Sat, 26 Jul 2008 06:09:01 BST CiteULike: dcastro's modulation http://www.citeulike.org/user/dcastro/tag/modulation CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/2933333 <i>Communications, IEEE Transactions on, Vol. 43, No. 234. (1995), pp. 1513-1524.</i><br /><br />A digital modulation method based on quadrature-carrier multiplexing of two N-dimensional biorthogonal signal sets is proposed. An embodiment of the proposed method referred to as quadrature frequency/phase modulation (QFPM), and its continuous phase modification CP QFPM, are described. QFPM results when two NFSK/2PSK (combined frequency and phase shift keying) signals are quadrature-carrier multiplexed. The power efficiency of QFPM and CP QFPM on the AWGN (additive white Gaussian noise) channel is always superior when compared to that of quadrature-amplitude modulation (QAM), and their bandwidth efficiency is demonstrated to be under certain conditions comparable or better than that of QAM. Both schemes possess a self-synchronization capability. The demonstrated performance characteristics of QFPM and CP QFPM suggest that they may be competitive with respect to QAM on channels where little or no filtering is desired Quadrature frequency/phase modulation S Fleisher Shouxing Qu doi:10.1109/26.380201 Communications, IEEE Transactions on, Vol. 43, No. 234. (1995), pp. 1513-1524. 2008-06-27T10:41:19-00:00 1995 Communications, IEEE Transactions on 43 234 1513 1524 modulation http://www.citeulike.org/user/dcastro/article/2933331 <i>Communications Magazine, IEEE, Vol. 17, No. 4. (1979), pp. 14-22.</i> Minimum shift keying: A spectrally efficient modulation S Pasupathy Communications Magazine, IEEE, Vol. 17, No. 4. (1979), pp. 14-22. 2008-06-27T10:41:09-00:00 1979 Communications Magazine, IEEE 17 4 14 22 efficiency modulation msk spectral http://www.citeulike.org/user/dcastro/article/2933328 <i>Circuits and Systems II: Express Briefs, IEEE Transactions on [see also Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on], Vol. 53, No. 1. (2006), pp. 13-17.</i><br /><br />This paper presents a transmitter architecture which is less sensitive to power amplifier AM/AM and AM/PM conversions. Indeed, most radio communication standards employ nonconstant envelope modulation such as in the 802.11 series. Owing to power amplifiers' nonlinearities, distortions on the modulations degrade the overall transmitter performance. As a consequence, linearization methods, such as envelope elimination and restoration, have to be employed. The architecture relies on the transformation of a nonconstant envelope modulation to a constant or switched one. This signal coding enables the efficient amplification of the signal without undergoing power amplifier distortions. The envelope variation is restored by bandpass filtering just after the power amplifier. A transmitter architecture for nonconstant envelope modulation C Berland I Hibon JF Bercher M Villegas D Belot D Pache V Le Goascoz doi:10.1109/TCSII.2005.854594 Circuits and Systems II: Express Briefs, IEEE Transactions on [see also Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on], Vol. 53, No. 1. (2006), pp. 13-17. 2008-06-27T10:40:48-00:00 2006 Circuits and Systems II: Express Briefs, IEEE Transactions on [see also Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on] 53 1 13 17 envelope modulation papr http://www.citeulike.org/user/dcastro/article/2933325 <i>Consumer Electronics, IEEE Transactions on, Vol. 43, No. 3. (1997), pp. 443-447.</i><br /><br />The effect of nonlinearity on a QPSK-OFDM-QAM signal is analyzed. One of the characteristics of an OFDM-QAM signal is its wide range of envelope fluctuation: its crest factor, defined as the ratio of the peak instantaneous power to the average (rms) power in dB, is typically greater than 10. When an OFDM-QAM signal drives a nonlinear device, nonlinearity will result in signal compression and intermodulation among the sub-carriers at the output. An analytical method is used to predict the input back-off needed to keep the intermodulation below an acceptable level. For sufficient large number of sub-carriers, we show that to keep the intermodulation power 30 dB below the signal power, we need to back-off the input power by 6.5 dB. However, from the BER point of view, the degradation is less than 2 dB at BER=0.01% even for 1 dB input back-off The effect of nonlinearity on a QPSK-OFDM-QAM signal Chia-Liang Liu doi:10.1109/30.628655 Consumer Electronics, IEEE Transactions on, Vol. 43, No. 3. (1997), pp. 443-447. 2008-06-27T10:40:41-00:00 1997 Consumer Electronics, IEEE Transactions on 43 3 443 447 modulation nonlinear http://www.citeulike.org/user/dcastro/article/2883719 <i>Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE, Vol. 6 (2003), pp. 3316-3320 vol.6.</i><br /><br />We investigate bit-interleaved coded modulation with iterative decoding (BICM-ID) for bandwidth efficient transmission, where the bit error rate is reduced through iterations between a multilevel demapper and a simple channel decoder. In order to achieve a significant turbo-gain, the assignment strategy of the binary indices to signal points is crucial. We address the problem of finding the most suitable index assignments to arbitrary, high order signal constellations. A new method based on the binary switching algorithm is proposed that finds optimized mappings outperforming previously known ones. Optimized symbol mappings for bit-interleaved coded modulation with iterative decoding F Schreckenbach N Gortz J Hagenauer G Bauch doi:10.1109/GLOCOM.2003.1258849 Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE, Vol. 6 (2003), pp. 3316-3320 vol.6. 2008-06-11T20:15:02-00:00 2003 Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE 6 3316 3320 vol.6 decoder iterative modulation http://www.citeulike.org/user/dcastro/article/2877953 <i>Communications, 1996. ICC 96, Conference Record, Converging Technologies for Tomorrow's Applications. 1996 IEEE International Conference on, Vol. 2 (1996), pp. 974-978 vol.2.</i><br /><br />In this paper, we propose a new solution to parallel concatenation of trellis codes with multilevel amplitude/phase modulations and a suitable bit by bit iterative decoding structure. Examples are given for throughput 2 and 4 bits/sec/Hz with 8 PSK, 16 QAM, and 64 QAM modulations. For parallel concatenated trellis codes in the examples, rate 2/3 and 4/5, 8, and 16-state binary convolutional codes with Ungerboeck mapping by set partitioning (natural mapping), a reordered mapping, and Gray code mapping are used. The performance of these codes is within 1 dB from the Shannon limit at a bit error probability of 10 ^-7 for a given throughput, which outperforms the performance of all codes reported in the past for the same throughput Parallel concatenated trellis coded modulation S Benedetto D Divsalar G Montorsi F Pollara doi:10.1109/ICC.1996.541356 Communications, 1996. ICC 96, Conference Record, Converging Technologies for Tomorrow's Applications. 1996 IEEE International Conference on, Vol. 2 (1996), pp. 974-978 vol.2. 2008-06-09T19:33:04-00:00 1996 Communications, 1996. ICC 96, Conference Record, Converging Technologies for Tomorrow's Applications. 1996 IEEE International Conference on 2 974 978 vol.2 code modulation parallel http://www.citeulike.org/user/dcastro/article/2808925 <i>ION NTM 2007 Proceedings (2007)</i> A Theoretical Survey of the Spreading Modulation of the New GPS Signals (L1C, L2C, and L5) IF Progri WR Michalson J Wang ION NTM 2007 Proceedings (2007) 2008-05-18T12:33:34-00:00 2007 ION NTM 2007 Proceedings galileo gps modulation http://www.citeulike.org/user/dcastro/article/2806808 <i>Communications Magazine, IEEE, Vol. 37, No. 4. (1999), pp. 80-86.</i><br /><br />In a digital transmission system, synchronization is an essential receiver function. Accurate timing information must be known to the demodulator in order to produce reliable estimates of the transmitted data sequence. In this article, synchronization for discrete multitone transmission (DMT) is examined. The effect of imperfect timing on the receiver performance is investigated. An overview of timing estimation and correction circuits based on data-aided and non-data-aided algorithms derived from maximum-likelihood estimation theory is given Synchronization with DMT modulation T Pollet M Peeters doi:10.1109/35.755454 Communications Magazine, IEEE, Vol. 37, No. 4. (1999), pp. 80-86. 2008-05-17T10:55:11-00:00 1999 Communications Magazine, IEEE 37 4 80 86 dmt modulation synchronization http://www.citeulike.org/user/dcastro/article/2802310 <i>Machine Learning and Cybernetics, 2007 International Conference on, Vol. 5 (2007), pp. 2653-2656.</i><br /><br />A PN (pseudo noise) code acquisition scheme for direct sequence spread spectrum (DSSS) systems is developed in this paper, which is especially suitable for the simultaneous presence of various rate data modulation and wide Doppler shift range at low signal-to-noise ratio. The technique is based on FFT and noncoherent integration, and can be implemented easily with less hardware cost. Some computer simulation results are given, which show that the technique can achieve fast PN acquisition and obtain carrier Doppler frequency estimation. A PN Code Acquisition Scheme in the Presence of Data Modulation and Doppler Shift Zhi-Jun Chen Jiang Zhao Su-Li Guo Ying-Bao Zhao doi:10.1109/ICMLC.2007.4370597 Machine Learning and Cybernetics, 2007 International Conference on, Vol. 5 (2007), pp. 2653-2656. 2008-05-15T18:22:16-00:00 2007 Machine Learning and Cybernetics, 2007 International Conference on 5 2653 2656 acquisition code data doppler modulation pn http://www.citeulike.org/user/dcastro/article/2782013 <i>Circuits and Systems II: Express Briefs, IEEE Transactions on [see also Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on], Vol. 52, No. 6. (2005), pp. 336-338.</i><br /><br />Signal-to-noise ratio (SNR) measurement is required in many receivers and systems of communications. In this brief, we derive a new SNR's estimator based on the second and fourth-order moments of the complex signals of quadrature phase-shift keying modulations. The mean square error of the estimated SNR by the proposed algorithm is smaller than that by other methods for a low SNR with limited samples. A new SNR's estimator for QPSK Modulations in an AWGN channel Guangliang Ren Yilin Chang Hui Zhang doi:10.1109/TCSII.2005.849008 Circuits and Systems II: Express Briefs, IEEE Transactions on [see also Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on], Vol. 52, No. 6. (2005), pp. 336-338. 2008-05-09T23:47:09-00:00 2005 Circuits and Systems II: Express Briefs, IEEE Transactions on [see also Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on] 52 6 336 338 channel estimator modulation noise qpsk snr http://www.citeulike.org/user/dcastro/article/1767563 <i>Communications Letters, IEEE, Vol. 4, No. 2. (2000), pp. 43-45.</i><br /><br />Four signal-to-noise ratio (SNR) estimators for quaternary phase-shift keying (QPSK)-like signaling are proposed and examined. Two are based on receiver statistics directly related to the SNR while two others are based on receiver statistics inversely related to the SNR. The results show that the estimators based on the inverse of the SNR perform better than the estimators based on the SNR Comparison of four SNR estimators for QPSK modulations NC Beaulieu AS Toms DR Pauluzzi doi:10.1109/4234.824751 Communications Letters, IEEE, Vol. 4, No. 2. (2000), pp. 43-45. 2007-10-14T18:27:39-00:00 2000 Communications Letters, IEEE 4 2 43 45 estimator modulation qpsk snr http://www.citeulike.org/user/dcastro/article/2770265 <i>Vehicular Technology, IEEE Transactions on, Vol. 36, No. 1. (1987), pp. 28-35.</i><br /><br />Several modulation schemes for transmitting data over land mobile satellite channels are compared using a Monte Carlo simulation. Schemes under consideration include differentially detected minimum shift keying (DMSK), differentially detected filtered offset quadrature phase shift keying (DOQPSK), and coherently detected binary phase shift keying with transparent tone-in-band processing (BPSK-TTIB). The transmission of data to and from a mobile radio, which is also capable of operating as an amplitude companded single sideband radio, is the application considered here. The nominal bit rate is 2400 bit/s, while the nominal channel spacing is 5 kHz. DOQPSK with nonredundant single-error correction (SEC) is shown to be a promising candidate. It is capable of outperforming DMSK with SEC by more than 1 dB. Techniques that send a reference signal along with a PSK signal and then perform coherent detection, such as BPSK-TTIB, are also shown to be inferior to DOQPSK with SEC for the class of channels considered here. A comparison of data modulation techniques for land mobile satellite channels JH Lodge ML Moher SN Crozier Vehicular Technology, IEEE Transactions on, Vol. 36, No. 1. (1987), pp. 28-35. 2008-05-08T08:56:17-00:00 1987 Vehicular Technology, IEEE Transactions on 36 1 28 35 channel mobile modulation satellite http://www.citeulike.org/user/dcastro/article/2758164 <i>Selected Areas in Communications, IEEE Journal on, Vol. 5, No. 5. (1987), pp. 879-889.</i><br /><br />Frequency-selective fading caused by multipath time delay spread degrades digital communication channels by causing intersymbol interference, thus resulting in an irreducible BER and imposing a upper limit on the data symbol rate. In this paper, a frequencyselective, slowly fading channel is studied by computer simulation. The unfiltered BPSK, QPSK, OQPSK, and MSK modulations are considered first to illustrate the physical insights and the error mechanisms. Two classes of modulation with spectral-shaping filtering are studied next to assess the tradeoff between spectral occupancy and the performance under the influence of time delay spread. The simulation is very flexible so that different channel parameters can be studied and optimized either individually or collectively. The irreducible BER averaged over fading samples with a given delay profile is used to compare different modulation/detection methods, while the cumulative distribution of short-term BER is employed to show allowable data symbol rates for given values of delay spread. It is found that both GMSK and QPSK with a raised-cosine Nyquist pulse are suitable for a TDM/TDMA digital portable communications channel. The Effects of Time Delay Spread on Portable Radio Communications Channels with Digital Modulation J Chuang Selected Areas in Communications, IEEE Journal on, Vol. 5, No. 5. (1987), pp. 879-889. 2008-05-05T14:51:13-00:00 1987 Selected Areas in Communications, IEEE Journal on 5 5 879 889 channel delay digital mobile modulation radio spread time http://www.citeulike.org/user/dcastro/article/2713258 <i>Vehicular Technology Conference, 1993 IEEE 43rd (1993), pp. 38-41.</i><br /><br />A coherent F-QPSK modem radio technique is proposed for future generations of high-capacity personal communication services (PCSs) systems. F-QPSK is a constant envelope modulation that is 6 to 8 dB more power efficient than non-constant envelope signalings like the π/4 DQPSK as used in the US IS-54 digital cellular mobile radio and the Japanese Handyphone standards. A comprehensive evaluation of F-QPSK's adjacent channel interference (ACI) characteristics, spectral efficiency in b/s/Hz/m² and bit error rate (BER) performance in a PCS cellular environment is presented. The results are compared with Gaussian minimum shift keying (GMSK), which is the modulation format adopted in the current PCSs standards DECT and DCS1800. It is demonstrated that F-QPSK has an attainable spectral efficiency of 1.42 b/s/Hz, which is 51% higher than GMSK as used in DECT. The BER performance of F-QPSK is also more robust in both Rayleigh fading and CCI controlled environments F-QPSK-A superior modulation for future generations of high-capacity microcellular PCS systems PSK Leung K Feher doi:10.1109/VETEC.1993.507005 Vehicular Technology Conference, 1993 IEEE 43rd (1993), pp. 38-41. 2008-04-24T14:47:29-00:00 1993 Vehicular Technology Conference, 1993 IEEE 43rd 38 41 capacity efficiency high mobile modulation http://www.citeulike.org/user/dcastro/article/2678799 <i>Communications, 1994. ICC '94, SUPERCOMM/ICC '94, Conference Record, 'Serving Humanity Through Communications.' IEEE International Conference on (1994), pp. 645-649 vol.2.</i><br /><br />This paper presents a new coding scheme based on the association of a turbo-code with a bandwith efficient modulation. It is shown that the new coding scheme provides a substantial coding gain both on Gaussian channels and Rayleigh channels. On a Gaussian channel, it outperforms 64-state trellis-coded modulation (TCM) by 2.5 dB at the bit error rate (BER) of 10^-6. On a Rayleigh fading channel, it outperforms 64-state TCM optimized for that environment Turbo-codes and high spectral efficiency modulation S Le Goff A Glavieux C Berrou doi:10.1109/ICC.1994.368804 Communications, 1994. ICC '94, SUPERCOMM/ICC '94, Conference Record, 'Serving Humanity Through Communications.' IEEE International Conference on (1994), pp. 645-649 vol.2. 2008-04-16T19:26:48-00:00 1994 Communications, 1994. ICC '94, SUPERCOMM/ICC '94, Conference Record, 'Serving Humanity Through Communications.' IEEE International Conference on 645 649 vol.2 efficiency high modulation spectral turbocode http://www.citeulike.org/user/dcastro/article/2674578 <i>Communications Magazine, IEEE, Vol. 41, No. 5. (2003), pp. 92-98.</i><br /><br />Designing a system able to cope with a hostile channel is a typical challenge for data communication engineers. High-data-rate communication over power lines is an exemplar case: while power lines are a potentially convenient and inexpensive "no new wire" medium for data transmission, their features make it very difficult to design a simple modem. In this article we illustrate the main features of the power line communication channel, and some of the solutions advocated for modem design. Coding and modulation for a horrible channel E Biglieri doi:10.1109/MCOM.2003.1200107 Communications Magazine, IEEE, Vol. 41, No. 5. (2003), pp. 92-98. 2008-04-15T17:57:00-00:00 2003 Communications Magazine, IEEE 41 5 92 98 channel coding modulation http://www.citeulike.org/user/dcastro/article/2042842 <i>Selected Areas in Communications, IEEE Journal on, Vol. 16, No. 2. (1998), pp. 206-218.</i><br /><br />We present a bandwidth-efficient channel coding scheme that has an overall structure similar to binary turbo codes, but employs trellis-coded modulation (TCM) codes (including multidimensional codes) as component codes. The combination of turbo codes with powerful bandwidth-efficient component codes leads to a straightforward encoder structure, and allows iterative decoding in analogy to the binary turbo decoder. However, certain special conditions may need to be met at the encoder, and the iterative decoder needs to be adapted to the decoding of the component TCM codes. The scheme has been investigated for 8-PSK, 16-QAM, and 64-QAM modulation schemes with varying overall bandwidth efficiencies. A simple code choice based on the minimal distance of the punctured component code has also been performed. The interset distances of the partitioning tree can be used to fix the number of coded and uncoded bits. We derive the symbol-by-symbol MAP component decoder operating in the log domain, and apply methods of reducing decoder complexity. Simulation results are presented and compare the scheme with traditional TCM as well as turbo codes with Gray mapping. The results show that the novel scheme is very powerful, yet of modest complexity since simple component codes are used Bandwidth-efficient turbo trellis-coded modulation using punctured component codes P Robertson T Worz doi:10.1109/49.661109 Selected Areas in Communications, IEEE Journal on, Vol. 16, No. 2. (1998), pp. 206-218. 2007-12-02T09:23:56-00:00 1998 Selected Areas in Communications, IEEE Journal on 16 2 206 218 bandwidth code efficiency modulation puncturing trellis http://www.citeulike.org/user/dcastro/article/955307 <i>Communications Magazine, IEEE, Vol. 25, No. 2. (1987), pp. 12-21.</i> Trellis-coded modulation with redundant signal sets Part II: State of the art G Ungerboeck Communications Magazine, IEEE, Vol. 25, No. 2. (1987), pp. 12-21. 2006-11-21T15:04:23-00:00 1987 Communications Magazine, IEEE 25 2 12 21 code modulation trellis http://www.citeulike.org/user/dcastro/article/955306 <i>Communications Magazine, IEEE, Vol. 25, No. 2. (1987), pp. 5-11.</i> Trellis-coded modulation with redundant signal sets Part I: Introduction G Ungerboeck Communications Magazine, IEEE, Vol. 25, No. 2. (1987), pp. 5-11. 2006-11-21T15:03:59-00:00 1987 Communications Magazine, IEEE 25 2 5 11 modulation trellis http://www.citeulike.org/user/dcastro/article/2625648 <i>Signal Processing and Communications Applications, 2007. SIU 2007. IEEE 15th (2007), pp. 1-4.</i><br /><br />In this study, we present the implementation of Binary Amlitude Shift Keying (BASK), Binary Phase Shift Keying(BPSK), Binary Frequency Shift Keying (BFSK), Quadrature Phase Shift Keying(QPSK) on FPGA using one of hardware definition language, VHDL. Algofithms are implemented on 3s 100evq100-4 device, belong to Xilinx FPGA farmily. Inputs are from RAM of FPGA card. In this woik, the aim of chosing FPGA is: FPGAs perform faster compared to other processors, and parallel-processing features of VHDL enables fast results, to be able to investigate the logical programming side of FPGAs. FPGA Based Implementation of Communication Modulation Fatma Demir Ugur Kafadar Sener Dikmese Hasan Dincer doi:10.1109/SIU.2007.4298751 Signal Processing and Communications Applications, 2007. SIU 2007. IEEE 15th (2007), pp. 1-4. 2008-04-03T09:59:22-00:00 2007 Signal Processing and Communications Applications, 2007. SIU 2007. IEEE 15th 1 4 communication fpga modulation http://www.citeulike.org/user/dcastro/article/2479096 <i>Communications, IEEE Transactions on [legacy, pre - 1988], Vol. 29, No. 11. (1981), pp. 1661-1668.</i><br /><br />This paper considers the performance of QPR in the presence of the identical jamming postulated in Part I. Although a QPR system employs a single sample detector in its receiver, while QASK (or QPSK) requires a matched-filter type of receiver., it is shown that the coherent detection performances of the two in the presence of the intentional jammer have definite similarities. Coherent Detection of Frequency-Hopped Quadrature Modulations in the Presence of Jamming--Part II: QPR Class I Modulation M Simon Communications, IEEE Transactions on [legacy, pre - 1988], Vol. 29, No. 11. (1981), pp. 1661-1668. 2008-03-06T15:16:14-00:00 1981 Communications, IEEE Transactions on [legacy, pre - 1988] 29 11 1661 1668 coherent detection fh jam modulation http://www.citeulike.org/user/dcastro/article/2479091 <i>Communications, IEEE Transactions on [legacy, pre - 1988], Vol. 29, No. 11. (1981), pp. 1644-1660.</i><br /><br />This paper examines the performance of coherent QPSK and QASK systems combined with FH or FH/PN spread spectrum techniques in the presence of partial-band multitone or noise jamming. The worst-case jammer and worst-case performance are determined as functions of the signal-to-background noise ratio (SNR) and signal-to-jammer power ratio (SJR). Asymptotic results for high SNR are shown to have a linear dependence between the jammer's optimal power allocation and the system error probability performance. Coherent Detection of Frequency-Hopped Quadrature Modulations in the Presence of Jamming--Part I: QPSK and QASK Modulations M Simon A Polydoros Communications, IEEE Transactions on [legacy, pre - 1988], Vol. 29, No. 11. (1981), pp. 1644-1660. 2008-03-06T15:13:45-00:00 1981 Communications, IEEE Transactions on [legacy, pre - 1988] 29 11 1644 1660 coherent detection fh jam modulation spread-spectrum http://www.citeulike.org/user/dcastro/article/2421309 <i>Wireless Communications, IEEE [see also IEEE Personal Communications], Vol. 12, No. 2. (2005), pp. 6-7.</i> Guest editorial - Modulation, coding and signal processing for wireless communications doi:10.1109/MWC.2005.1421923 Wireless Communications, IEEE [see also IEEE Personal Communications], Vol. 12, No. 2. (2005), pp. 6-7. 2008-02-24T12:52:27-00:00 2005 Wireless Communications, IEEE [see also IEEE Personal Communications] 12 2 6 7 coding communication modulation processing signal wireless http://www.citeulike.org/user/dcastro/article/2421303 <i>Vehicular Technology Conference, 1996. 'Mobile Technology for the Human Race'., IEEE 46th, Vol. 1 (1996), pp. 26-30 vol.1.</i><br /><br />An overview of modulation and coding techniques commonly used in wireless communications is given. In addition to the tutorial presentation, reference is made to a number of papers on modulation and coding options in environments typical of the land mobile channel. The characteristics of the mobile wireless channel make for a challenging design of communication systems that, in addition to the demand for good power and bandwidth efficiencies, must cope with the various degradations encountered such as adjacent channel interference, cochannel interference, fading, and multipath An overview of modulation and coding for wireless communications RE Ziemer doi:10.1109/VETEC.1996.503401 Vehicular Technology Conference, 1996. 'Mobile Technology for the Human Race'., IEEE 46th, Vol. 1 (1996), pp. 26-30 vol.1. 2008-02-24T12:50:59-00:00 1996 Vehicular Technology Conference, 1996. 'Mobile Technology for the Human Race'., IEEE 46th 1 26 30 vol.1 coding communication modulation overview wireless http://www.citeulike.org/user/dcastro/article/2355171 <i>Position, Location, And Navigation Symposium, 2006 IEEE/ION (2006), pp. 883-892.</i> MBOC: The New Optimized Spreading Modulation Recommended for GALILEO L1 OS and GPS L1C GW Hein JA Avila-Rodriguez S Wallner AR Pratt J Owen J Issler JW Betz CJ Hegarty S Lenahan S Lenahan JJ Rushanan A10 AL Kraay A11 TA Stansell A12 Position, Location, And Navigation Symposium, 2006 IEEE/ION (2006), pp. 883-892. 2008-02-08T23:57:44-00:00 2006 Position, Location, And Navigation Symposium, 2006 IEEE/ION 883 892 galileo gps mboc modulation http://www.citeulike.org/user/dcastro/article/2279513 <i>Communications, IEEE Transactions on, Vol. 46, No. 2. (1998), pp. 182-190.</i><br /><br />The multilevel modulation techniques of 64-quadrature amplitude modulation (QAM) and 64-differential amplitude and phase-shift keying (DAPSK) have been proposed in combination with the orthogonal frequency-division multiplexing (OFDM) scheme for digital terrestrial video broadcasting (DTVB). With this system a data rate of 34 Mb/s can be transmitted over an 8-MHz radio channel. A comparison of these modulation methods in the uncoded case has been presented by Engels and Rohling (see European Trans. Telecommun., vol.6, p.633-40, 1995). The channel coding scheme proposed for DTVB by Schafer (see Proc. Int. Broadcasting Convention, Amsterdam, The Netherlands, p.79-84, 1995) consists of an inner convolutional code concatenated with an outer Reed-Solomon (RS) code. In this paper the performance of the convolutional codes is analyzed for the two modulation techniques. This analysis includes soft decision Viterbi (1971) decoding of the convolutional code. For soft decision decoding of DAPSK modulated signals a new metric is developed Performance analysis of Viterbi decoding for 64-DAPSK and 64-QAM modulated OFDM signals T May H Rohling V Engels doi:10.1109/26.659477 Communications, IEEE Transactions on, Vol. 46, No. 2. (1998), pp. 182-190. 2008-01-23T08:50:03-00:00 1998 Communications, IEEE Transactions on 46 2 182 190 decoder modulation ofdm qam viterbi http://www.citeulike.org/user/dcastro/article/2072362 <i>Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th, Vol. 3 (2004), pp. 1816-1820 Vol.3.</i><br /><br />This paper investigates the adaptive subcarrier and bit allocation algorithm for OFDMA systems. To minimize overall transmit power, we propose a novel adaptive subcarrier and bit allocation algorithm based on channel state information, Moreover, the block-wise method is considered based on channel variation for adaptive subcarrier and bit allocation. It is shown that a near optimal solution is obtained by the proposed algorithm which has low complexity compared to that of other conventional algorithms. Also, it is shown that the block-wise method significantly reduces the complexity and the feedback or side information though has a slight transmit power increase. Efficient subcarrier and bit allocation algorithm for OFDMA system with adaptive modulation Ho Kim JS Kwak Jung Choi Jae Lee Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th, Vol. 3 (2004), pp. 1816-1820 Vol.3. 2007-12-07T09:53:34-00:00 2004 Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th 3 1816 1820 Vol.3 adaptive algorithm carrier modulation ofdma http://www.citeulike.org/user/dcastro/article/2002763 <i>Vehicular Technology, IEEE Transactions on, Vol. 40, No. 4. (1991), pp. 686-693.</i><br /><br />The author presents pilot-symbol-assisted modulation (PSAM) on a solid analytical basis, a feature missing from previous work. Closed-form expressions are presented for the bit error rate (BER) in binary-phase-shift-keying (BPSK) and in quadrature-phase-shift-keying (QPSK), for a tight upper bound on the symbol error rate in 16 quadrature-amplitude-modulation (16-QAM), and for the optimized receiver coefficients. The error rates obtained are lower than for differential detection for any combination of signal-to-noise ratio (SNR) and Doppler spread, and the performance is within 1 dB of a perfect reference system under slow-fading conditions and within 3 dB when the Doppler spread is 5% of the symbol rate An analysis of pilot symbol assisted modulation for Rayleigh fading channels [mobile radio] JK Cavers Vehicular Technology, IEEE Transactions on, Vol. 40, No. 4. (1991), pp. 686-693. 2007-11-28T10:27:54-00:00 1991 Vehicular Technology, IEEE Transactions on 40 4 686 693 analysis channel estimation fading mobile modulation pilot radio rayleigh symbol wireless http://www.citeulike.org/user/dcastro/article/1959710 <i>Mobile and Personal Satellite Communications 2, 1996. Proceedings of the Second European Workshop on Mobile/Personal Satcoms (EMPS '96) (1996), pp. 1-11.</i> Approaching the Shannon Limit: theorist's dream and practitioner's challenge A Viterbi Mobile and Personal Satellite Communications 2, 1996. Proceedings of the Second European Workshop on Mobile/Personal Satcoms (EMPS '96) (1996), pp. 1-11. 2007-11-22T15:17:57-00:00 1996 Mobile and Personal Satellite Communications 2, 1996. Proceedings of the Second European Workshop on Mobile/Personal Satcoms (EMPS '96) 1 11 convolutional modulation viterbi http://www.citeulike.org/user/dcastro/article/1959686 <i>Communications Magazine, IEEE, Vol. 27, No. 7. (1989), pp. 11-19.</i><br /><br />Since the early 1970s, for power-limited applications, the convolutional code constraint length <e1>K</e1>=7 and rate 1/2, optimum in the sense of maximum free distance and minimum number of bit errors caused by remerging paths at the free distance, has become the de facto standard for coded digital communication. This was reinforced when punctured versions of this code became the standard for rate 3/4 and 7/8 codes for moderately bandlimited channels. Methods are described for using the same <e1>K</e1>=7, rate 1/2 convolutional code with signal phase constellations of 8-PSK and 160PSK and quadrature amplitude constellations of 16-QASK, 64-QASK, and 256-QASK to achieve, respectively, 2 and 3, and 2, 4, and 6 b/s/Hz bandwidth efficiencies while providing power efficiency that in most cases is virtually equivalent to that of the best Ungerboeck codes for constraint length 7 or 64 states. This pragmatic approach to all coding applications permits the use of a single basic coder and decoder to achieve respectable coding (power) gains for bandwidth efficiencies from 1 b/s/Hz to 6 b/s/Hz A pragmatic approach to trellis-coded modulation AJ Viterbi JK Wolf E Zehavi R Padovani Communications Magazine, IEEE, Vol. 27, No. 7. (1989), pp. 11-19. 2007-11-22T15:13:44-00:00 1989 Communications Magazine, IEEE 27 7 11 19 code convolutional modulation viterbi http://www.citeulike.org/user/dcastro/article/1915469 <i>Communications, 2007. ICC '07. IEEE International Conference on (2007), pp. 4438-4443.</i> On the Acquisition Ambiguity for Galileo BOC(n,n) Modulated Signals G Avellone M Frazzetto E Messina doi:10.1109/ICC.2007.733 Communications, 2007. ICC '07. IEEE International Conference on (2007), pp. 4438-4443. 2007-11-14T19:20:29-00:00 2007 Communications, 2007. ICC '07. IEEE International Conference on 4438 4443 acquisition boc galileo modulation signal http://www.citeulike.org/user/dcastro/article/1915431 <i>Communications, 2002. ICC 2002. IEEE International Conference on, Vol. 3 (2002), pp. 1476-1479 vol.3.</i><br /><br />In this contribution we consider the Cramer-Rao bound (CRB) for the estimation of the time delay of a noisy linearly modulated signal with random data symbols. In spite of the presence of the nuisance parameters (i.e., the random data symbols), we obtain a closed-form expression of this CRB for arbitrary PSK, QAM or PAM constellations and a bandlimited square-root Nyquist transmit pulse. The true Cramer-Rao bound for estimating the time delay of a linearly modulated waveform N Noels H Steendam M Moeneclaey Communications, 2002. ICC 2002. IEEE International Conference on, Vol. 3 (2002), pp. 1476-1479 vol.3. 2007-11-14T19:14:35-00:00 2002 Communications, 2002. ICC 2002. IEEE International Conference on 3 1476 1479 vol.3 cramer-rao delay estimation modulation time http://www.citeulike.org/user/dcastro/article/1915430 <i>Communications Letters, IEEE, Vol. 5, No. 5. (2001), pp. 218-220.</i><br /><br />We consider the Cramer-Rao bound (CRB) for the estimation of the carrier phase and frequency of a noisy linearly modulated signal with random data symbols. The observation vector consists of the matched filter output samples taken at the symbol rate, assuming known symbol timing. Because of the presence of the random data, the evaluation of this CRB is quite tedious. Instead, here we derive a simple closed-form expression for the limit of the CRB at low-signal-to-noise ratio (SNR), which holds for arbitrary PAM, PSK, and QAM constellations Low-SNR limit of the Cramer-Rao bound for estimating the carrier phase and frequency of a PAM, PSK, or QAM waveform H Steendam M Moeneclaey Communications Letters, IEEE, Vol. 5, No. 5. (2001), pp. 218-220. 2007-11-14T19:14:14-00:00 2001 Communications Letters, IEEE 5 5 218 220 carrier cramer-rao frequency modulation phase http://www.citeulike.org/user/dcastro/article/1915429 <i>Communications Letters, IEEE, Vol. 5, No. 1. (2001), pp. 31-33.</i><br /><br />In this letter we consider the Cramer-Rao bound (CRB) for the estimation of the time delay of a noisy linearly modulated signal with random data symbols and random carrier phase. Because of the presence of the nuisance parameters (i.e., data symbols and carrier phase), a closed-form expression of this CRB is very hard to obtain for arbitrary PSK, QAM or PAM constellations and a band-limited transmit pulse. Instead, we derive a simple expression for the limit of the CRB at low signal-to-noise ratio (SNR), which is a relevant benchmark for timing recovery algorithms operating at small E_s/N₀ Low-SNR limit of the Cramer-Rao bound for estimating the time delay of a PSK, QAM, or PAM waveform H Steendam M Moeneclaey Communications Letters, IEEE, Vol. 5, No. 1. (2001), pp. 31-33. 2007-11-14T19:13:51-00:00 2001 Communications Letters, IEEE 5 1 31 33 cramer-rao delay modulation time http://www.citeulike.org/user/dcastro/article/1913176 <i>Advances in Wired and Wireless Communication, 2005 IEEE/Sarnoff Symposium on (2005), pp. 223-228.</i><br /><br />We address the problem of identifying the modulation format of an incoming signal. We review many existing techniques for digital modulation recognition in a systematic way, which helps the reader to see the main features of each technique. The goal is to provide useful guidelines for choosing appropriate classification algorithms for different modulations, from the large pool of available techniques. Furthermore, the performance of a benchmark classifier is presented, as well as its sensitivity to several model mismatches. Open problems and possible directions for further research are briefly discussed Blind modulation classification: a concept whose time has come OA Dobre A Abdi Y Bar-Ness Wei Su Advances in Wired and Wireless Communication, 2005 IEEE/Sarnoff Symposium on (2005), pp. 223-228. 2007-11-14T10:20:14-00:00 2005 Advances in Wired and Wireless Communication, 2005 IEEE/Sarnoff Symposium on 223 228 blind classification modulation radio software http://www.citeulike.org/user/dcastro/article/1021897 <i>Computer Networks, 2006 International Symposium on (2006), pp. 11-16.</i><br /><br />The challenge for broadband fixed wireless access (BFWA) systems, which represent an attractive solution for broadband access in the last mile and for wireless backhauling applications in the "middle mile", lies in providing high data rates and quality of service (QoS). Such requirements mainly derive from the need to provide new bandwidth consuming multimedia services and applications, efficient handling of IP traffic, effective use of the limited radio spectrum and a greater backhaul capacity to support the increased number of users per cell site. IEEE 802.16 family of standards and its associated consortium WiMAX are gaining more and more interest in the telecommunication areas as broadband fixed wireless access solution with possible extension in nomadic and mobile area. Its main leverages are an efficient handling of IP traffic, the support of channel adaptivity and advanced QoS management. This paper aims at defining a new packet-based scheduling strategy for an IEEE 802.16 system supporting variable length MAC protocol data units (PDUs) and adaptive coding and modulation while fulfilling QoS requirements. A performance analysis of the proposed scheduler is presented and discussed in terms of packet transfer delay, MAC overhead and average throughput. Performance analysis of an efficient packet-based IEEE 802.16 MAC supporting adaptive modulation and coding M Settembre M Puleri S Garritano P Testa R Albanese M Mancini V Lo Curto Computer Networks, 2006 International Symposium on (2006), pp. 11-16. 2007-01-02T00:28:08-00:00 2006 Computer Networks, 2006 International Symposium on 11 16 80216 adaptive analysis coding modulation wimax http://www.citeulike.org/user/dcastro/article/1885734 <i>Communications, IEEE Transactions on [legacy, pre - 1988], Vol. 29, No. 7. (1981), pp. 1044-1050.</i><br /><br />This paper is concerned with digital modulation for future mobile radio telephone services. First, the specific requirements on the digital modulation for mobile radio use are described. Then, premodulation Gaussian filtered minimum shift keying (GMSK) with coherent detection is proposed as an effective digital modulation for the present purpose, and its fundamental properties are clarified with the aid of machine computation. The constitution of modulator and demodulator is then discussed from the viewpoints of mobile radio applications. The superiority of this modulation is supported by some experimental test results. GMSK Modulation for Digital Mobile Radio Telephony K Murota K Hirade Communications, IEEE Transactions on [legacy, pre - 1988], Vol. 29, No. 7. (1981), pp. 1044-1050. 2007-11-08T18:59:31-00:00 1981 Communications, IEEE Transactions on [legacy, pre - 1988] 29 7 1044 1050 digital gmsk mobile modulation radio http://www.citeulike.org/user/dcastro/article/173915 <i>Communications, IEEE Transactions on [legacy, pre - 1988], Vol. 28, No. 8. (1980), pp. 1107-1121.</i><br /><br />This paper examines the problems of carrier phase estimation and symbol timing estimation for carrier-type synchronous digital data signals, with tutorial objectives foremost. Carrier phase recovery for suppressed-carrier versions of double sideband (DSB), vestigial sideband (VSB), and quadrature amplitude modulation (QAM) signal formats is considered first. Then the problem of symbol timing recovery for a baseband pulse-amplitude modulation (PAM) signal is examined. Timing recovery circuits based on elementary statistical properties are discussed as well as timing recovery based on maximum-likelihood estimation theory. A relatively simple approach to evaluation of timing recovery circuit performance in terms of rms jitter of the timing parameters is presented. Carrier and Bit Synchronization in Data Communication--A Tutorial Review L Franks Communications, IEEE Transactions on [legacy, pre - 1988], Vol. 28, No. 8. (1980), pp. 1107-1121. 2005-04-29T08:40:16-00:00 1980 Communications, IEEE Transactions on [legacy, pre - 1988] 28 8 1107 1121 communications data modulation synchronization tutorial http://www.citeulike.org/user/dcastro/article/967180 <i>Selected Areas in Communications, IEEE Journal on, Vol. 2, No. 5. (1984), pp. 632-647.</i><br /><br />This paper attempts to present a comprehensive tutorial survey of the development of efficient modulation techniques for bandlimited channels, such as telephone channels. After a history of advances in commercial high-speed modems and a discussion of theoretical limits, it reviews efforts to optimize two-dimensional signal constellations and presents further elaborations of uncoded modulation. Its principal emphasis, however, is on coded modulation techniques, in which there is an explosion of current interest, both for research and for practical application. Both block-coded and trellis-coded modulation are covered, in a common framework. A few new techniques are presented. Efficient Modulation for Band-Limited Channels G Forney R Gallager G Lang F Longstaff S Qureshi Selected Areas in Communications, IEEE Journal on, Vol. 2, No. 5. (1984), pp. 632-647. 2006-11-29T17:44:07-00:00 1984 Selected Areas in Communications, IEEE Journal on 2 5 632 647 modulation