Sun, 27 Jul 2008 07:45:54 BST CiteULike: dcastro's Jung http://www.citeulike.org/user/dcastro/author/Jung CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/2802312 <i>Communications, IEEE Transactions on, Vol. 50, No. 8. (2002), pp. 1232-1235.</i><br /><br />An adaptive serial search pseudonoise (PN) code acquisition scheme is proposed, in which the detection threshold is scaled by the instantaneous received power measured prior to PN code correlation. We observe that the proposed scheme achieves significantly improved mean acquisition times compared to the conventional nonadaptive schemes under Rayleigh fading and pulsed Gaussian noise jamming. Furthermore, the proposed scheme is shown to be optimum under pulsed Gaussian noise jamming in the sense that it forces the worst case jamming fraction to unity. Adaptive PN code acquisition using instantaneous power-scaled detection threshold under Rayleigh fading and pulsed Gaussian noise jamming Kwonhue Choi Kyungwhoon Cheun Taejin Jung doi:10.1109/TCOMM.2002.801494 Communications, IEEE Transactions on, Vol. 50, No. 8. (2002), pp. 1232-1235. 2008-05-15T18:22:20-00:00 2002 Communications, IEEE Transactions on 50 8 1232 1235 acquisition adaptive code fading noise pn rayleigh threshold http://www.citeulike.org/user/dcastro/article/2801376 <i>Microwave Symposium Digest, 1998 IEEE MTT-S International, Vol. 3 (1998), pp. 1383-1386 vol.3.</i><br /><br />In this work, a beam-scanning array for antenna remoting via an optical link is presented. Optical control over the main beam is accomplished through the use of a photosensitive resonator. Experimental data shows a total scan angle up to 36° can be achieved with this optical technique All-optically controlled beam-scanning array for antenna remoting applications WR Deal T Jung MC Wu T Itoh doi:10.1109/MWSYM.1998.700632 Microwave Symposium Digest, 1998 IEEE MTT-S International, Vol. 3 (1998), pp. 1383-1386 vol.3. 2008-05-15T11:34:52-00:00 1998 Microwave Symposium Digest, 1998 IEEE MTT-S International 3 1383 1386 vol.3 antenna array beam optical http://www.citeulike.org/user/dcastro/article/2776232 <i>Communications, Computers and Signal Processing, 1999 IEEE Pacific Rim Conference on (1999), pp. 580-583.</i><br /><br />In this paper, by modifying a conventional method which requires two training symbols, we propose a timing and frequency synchronization algorithm for OFDM systems which requires one training symbol. While the frame/symbol timing is obtained by using the conventional method, the carrier frequency offset is efficiently estimated by the proposed method. Key features of the proposed method are presented in terms of missing probability and estimation error variance of the carrier frequency offset estimator in AWGN and frequency selective fading channels. It is shown that the proposed method not only reduces the number of training symbols but also possesses better performance than the conventional method without increased complexity An efficient frequency offset estimator for timing and frequency synchronization in OFDM systems Yun Kim Young Hahm Hye Jung Iickho Song doi:10.1109/PACRIM.1999.799604 Communications, Computers and Signal Processing, 1999 IEEE Pacific Rim Conference on (1999), pp. 580-583. 2008-05-09T16:11:36-00:00 1999 Communications, Computers and Signal Processing, 1999 IEEE Pacific Rim Conference on 580 583 estimator frequency ofdm synchronization time http://www.citeulike.org/user/dcastro/article/2763869 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 53, No. 10. (2005), pp. 3082-3089.</i><br /><br />The use of direct RF sampling has been explored as a means of designing multifrequency RF front ends. Such front ends will be useful to multifrequency RF applications such as global navigation satellite system receivers that use global positioning system (GPS) L1, L2, and L5 signals and Galileo signals. The design of a practical multifrequency direct RF sampling front end is dependent on having an analog-to-digital converter whose input bandwidth accommodates the highest carrier frequency and whose maximum sampling frequency is more than twice the cumulative bandwidth about the multiple carrier signals. The principle of direct RF sampling is used to alias all frequency bands of interest onto portions of the Nyquist bandwidth that do not overlap. This paper presents a new algorithm that finds the minimum sampling frequency that avoids overlap. This design approach requires a multifrequency bandpass filter for the frequency bands of interest. A prototype front end has been designed, built, and tested. It receives a GPS coarse/acquisition code at the L1 frequency and GPS antispoofing precision code at both L1 and L2. Dual-frequency signals with received carrier-to-noise ratios in excess of 52 dB-Hz have been acquired and tracked using this system. Design and practical implementation of multifrequency RF front ends using direct RF sampling ML Psiaki SP Powell Hee Jung PM Kintner doi:10.1109/TMTT.2005.855127 Microwave Theory and Techniques, IEEE Transactions on, Vol. 53, No. 10. (2005), pp. 3082-3089. 2008-05-07T06:08:30-00:00 2005 Microwave Theory and Techniques, IEEE Transactions on 53 10 3082 3089 design frequency front-end galileo gnss gps multi rf sampling http://www.citeulike.org/user/dcastro/article/2693262 <i>Electronics Letters, Vol. 33, No. 25. (1997), pp. 2102-2103.</i><br /><br />Future mobile radio systems like the European UMTS (universal mobile telecommunications system) will provide packet oriented data services with data rates up to 2 Mbit/s. Therefore, flexible and adaptive error correction coding must be deployed. Recently, rate compatible punctured Turbo-codes (RCPTCs) have been proposed. The authors discuss a design method for such codes and illustrate its viability by showing the performance results for an RCPTC with a block size of 672 bits Performance of rate compatible punctured Turbo-codes for mobile radio applications P Jung J Plechinger Electronics Letters, Vol. 33, No. 25. (1997), pp. 2102-2103. 2008-04-20T16:36:00-00:00 1997 Electronics Letters 33 25 2102 2103 mobile performance puncturing radio turbocode http://www.citeulike.org/user/dcastro/article/2424650 <i></i><br /><br />In this paper, by modifying a conventional method which requires two training symbols, we propose a timing and frequency synchronization algorithm for OFDM systems which requires one training symbol. While the frame/symbol timing is obtained by using the conventional method, the carrier frequency offset is efficiently estimated by the proposed method. Key features of the proposed method are presented in terms of missing probability and estimation error variance of the carrier frequency offset... An Efficient Frequency Offset Estimator for Timing and Frequency Synchronization in OFDM Systems Yun Kim Young Hahm Hye Jung Iickho Song 2008-02-25T08:18:06-00:00 estimation frequency ofdm offset synchronization time