Sat, 26 Jul 2008 06:11:25 BST CiteULike: dcastro's 80211 http://www.citeulike.org/user/dcastro/tag/80211 CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/3040245 <i>Vehicular Technology Conference, 2005. VTC-2005-Fall. 2005 IEEE 62nd, Vol. 4 (2005), pp. 2527-2531.</i> Performance of IEEE 802.11b in mobile railroad environments Ting Zhou H Sharif M Hempel P Mahasukhon Song Ci doi:10.1109/VETECF.2005.1559005 Vehicular Technology Conference, 2005. VTC-2005-Fall. 2005 IEEE 62nd, Vol. 4 (2005), pp. 2527-2531. 2008-07-24T15:38:28-00:00 2005 Vehicular Technology Conference, 2005. VTC-2005-Fall. 2005 IEEE 62nd 4 2527 2531 80211 mobile railway wlan http://www.citeulike.org/user/dcastro/article/3040183 <i>Military Communications Conference, 2005. MILCOM 2005. IEEE (2005), pp. 1819-1824 Vol. 3.</i><br /><br />Wireless local area network (WLAN) systems are typically designed to provide fixed or nomadic access. Using WLAN systems for military purposes raises the question of how WLAN terminals can be utilized in a fully mobile outdoor environment. In these environments, there typically exists multipath propagation with a large delay spread in the radio channel. This paper investigates the effect of terminal movement on the physical layer performance and capacity of IEEE 802.11b WLAN systems in a realistic outdoor mobile environment. Several wireless network interface cards are measured in laboratory conditions using a simulated radio channel. The measurement results indicate that WLAN systems can operate in mobile outdoor environment up to a certain mobile speed, and there are significant differences between equipment from product vendors. The effect of terminal movement to the physical layer performance of the IEEE 802.11b wireless LAN systems in simulated UMTS vehicular channel A Silvennoinen M Hall SG Haggman doi:10.1109/MILCOM.2005.1605937 Military Communications Conference, 2005. MILCOM 2005. IEEE (2005), pp. 1819-1824 Vol. 3. 2008-07-24T15:09:19-00:00 2005 Military Communications Conference, 2005. MILCOM 2005. IEEE 1819 1824 Vol. 3 80211 channel mobile umts wlan http://www.citeulike.org/user/dcastro/article/1366339 <i>Wireless Personal Communications, Vol. 41, No. 4. (June 2007), pp. 487-505.</i> The Effect of Terminal Movement on the Performance of IEEE 802.11 g Wireless LAN Systems in Simulated Radio Channels Silvennoinen Aki Hall Michael Haggman Sven-Gustav doi:10.1007/s11277-006-9155-1 Wireless Personal Communications, Vol. 41, No. 4. (June 2007), pp. 487-505. 2007-06-05T21:33:41-00:00 2007 Wireless Personal Communications 0929-6212 41 4 487 505 Springer 80211 channel mobile radio simulation wlan http://www.citeulike.org/user/dcastro/article/2809089 <i>Communications, 2003. ICC '03. IEEE International Conference on, Vol. 2 (2003), pp. 1196-1200 vol.2.</i><br /><br />In recent years there has been considerable interest in the development of standards for wireless local area networks. In particular, IEEE's 802.11a and 802.11g both employ coded orthogonal frequency division multiplexing (COFDM) but operate in different frequency bands. In this paper, the performance and relative merits of 802.11a and 802.11g are compared for the scenario of a corporate office wireless LAN application. It is shown that for comparable scenarios 802.11g achieves superior range but that 802.11a achieves higher data rates. Thus the two standards are found to have complimentary strengths and weaknesses. An evaluation of the performance of IEEE 802.11a and 802.11g wireless local area networks in a corporate office environment A Doefexi S Armour Beng-Sin Lee A Nix D Bull doi:10.1109/ICC.2003.1204558 Communications, 2003. ICC '03. IEEE International Conference on, Vol. 2 (2003), pp. 1196-1200 vol.2. 2008-05-18T14:14:36-00:00 2003 Communications, 2003. ICC '03. IEEE International Conference on 2 1196 1200 vol.2 80211 performance wireless wlan http://www.citeulike.org/user/dcastro/article/2809095 <i>Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE, Vol. 2 (2003), pp. 724-728 Vol.2.</i><br /><br />A MAC performance comparison between IEEE 802.11 a, 802.11e and HiperLAN/2 WLAN standards is presented integrating both physical layer rate adaptation and retransmission mechanisms. Some simulations of the different MAC and error control layers have been conducted using a binary error pattern captured from an actual OFDM modem instead of an error model. The performance is evaluated by assessing the maximum total goodput provided by the systems in typical radio environments. Finally, an analysis of the results establishes the conditions in which the mechanisms specific to each protocol become profitable. IEEE 802.11a, 802.11e and HiperLAN/2 goodput performance comparison in real radio conditions R Rollet C Mangin doi:10.1109/GLOCOM.2003.1258333 Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE, Vol. 2 (2003), pp. 724-728 Vol.2. 2008-05-18T14:16:30-00:00 2003 Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE 2 724 728 Vol.2 80211 performance http://www.citeulike.org/user/dcastro/article/2809088 <i>Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd, Vol. 1 (2001), pp. 668-672 vol.1.</i><br /><br />HIPERLAN/2 and IEEE 802.11a are two wireless LAN (WLAN) standards which operate in the 5 GHz band. In order to support broadband multimedia communications, they can provide data rates up to 54 Mbps. An overview of the two standards is presented together with software simulated physical layer performance results. The differences between the two standards (PDU size, MAC layers etc.) and the effects on throughput and range are also discussed A study of the performance of HIPERLAN/2 and IEEE 802.11a physical layers A Doufexi S Armour M Butler A Nix D Bull doi:10.1109/VETECS.2001.944927 Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd, Vol. 1 (2001), pp. 668-672 vol.1. 2008-05-18T14:14:17-00:00 2001 Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd 1 668 672 vol.1 80211 ofdm wireless wlan http://www.citeulike.org/user/dcastro/article/2805158 <i>Communications and Vehicular Technology, 2000. SCVT-200. Symposium on (2000), pp. 14-20.</i><br /><br />At present, wireless local area networks (WLANs) supporting broadband multimedia communication are being developed and standardized. Two such standards are HIPERLAN/2, defined by ETSI BRAN and the IEEE's 802.11a. These WLAN standards will provide data rates up to 54 Mbps (in a channel spacing of 20 MHz) in the 5.2 GHz band. In this paper, an overview of the the standards is presented together with software simulated physical layer performance results for each of the transmission modes defined in the two standards. Furthermore, the differences between the standards (protocol data unit-PDU-size, upper protocol layers etc.) and the effects on applications are discussed A comparison of HIPERLAN/2 and IEEE 802.11a physical and MAC layers A Doufexi S Armour A Nix D Bull doi:10.1109/SCVT.2000.923334 Communications and Vehicular Technology, 2000. SCVT-200. Symposium on (2000), pp. 14-20. 2008-05-16T12:02:15-00:00 2000 Communications and Vehicular Technology, 2000. SCVT-200. Symposium on 14 20 80211 physical wireless wlan http://www.citeulike.org/user/dcastro/article/897602 <i>(2006), pp. 525-530.</i> 802.11b/g Link Level Measurements for an Outdoor Wireless Campus Network Giuseppe Bianchi Fabrizio Formisano Domenico Giustiniano doi:10.1109/WOWMOM.2006.6 (2006), pp. 525-530. 2006-10-15T02:51:28-00:00 2006 525 530 IEEE Computer Society 80211 channel wireless http://www.citeulike.org/user/dcastro/article/2782982 <i>Aerospace and Electronic Systems, IEEE Transactions on, Vol. 43, No. 4. (2007), pp. 1617-1624.</i><br /><br />This paper presents results concerning the use of IEEE 802.11 a and b wireless local area network (WLAN) standards for proximity wireless networks on the Martian surface. The RF environment on the Martian surface is modeled using high-resolution digital elevation maps (DEMs) of Gusev Crater and Meridiani Planum (Hematite) as sample sites. The resulting propagation path loss models are then used in a physical layer (PHY) simulation. Our results show that Martian terrain as represented by the sites studied, can create multipath conditions which in turn affect 802.11 a and b PHY performance. However, with a few tens of milliwatts of radiated power and antenna heights within 1-2 m, orthogonal frequency division multiplexing (OFDM)-based 802.11 a can have very good PHY performance in terms of bit error rate (BER) and packet error rate (PER) for distances up to a few hundred meters; 802.11 b, which is based on direct-sequence spread spectrum (DSSS), is found to be much more adversely affected in the multipath environment. The DEM-based simulation methodology presented here may be more useful to mission planners than generic statistical models. Terrain-based simulation of IEEE 802.11a and b physical layers on the martian surface A Daga GR Lovelace DK Borah PL De Leon doi:10.1109/TAES.2007.4441762 Aerospace and Electronic Systems, IEEE Transactions on, Vol. 43, No. 4. (2007), pp. 1617-1624. 2008-05-10T14:56:10-00:00 2007 Aerospace and Electronic Systems, IEEE Transactions on 43 4 1617 1624 80211 martian physical simulation wlan http://www.citeulike.org/user/dcastro/article/2674775 <i>Personal Communications, IEEE [see also IEEE Wireless Communications], Vol. 8, No. 6. (2001), pp. 48-57.</i><br /><br />Broadband wireless communication is the key technology to a new generation of products in the consumer market. The emerging standards for the 5 GHz band will form the basis for many applications requiring a high communication bandwidth. Low cost and low power dissipation will be a prerequisite for most mobile applications. One way to realize low-cost systems is to reduce the system complexity and deploy highly integrated components. The work presented in this article discusses aspects of implementing a complete Hiperlan/2 and IEEE 802.11a compliant modem, including the physical layer as well as the data link control layer, into a single chip On the single-chip implementation of a Hiperlan/2 and IEEE 802.11a capable modem E Grass K Tittelbach-Helmrich U Jagdhold A Troya G Lippert O Kruger J Lehmann K Maharatna KF Dombrowski KF Dombrowski N Fiebig A10 R Kraemer A11 P Mahonen A12 doi:10.1109/98.972168 Personal Communications, IEEE [see also IEEE Wireless Communications], Vol. 8, No. 6. (2001), pp. 48-57. 2008-04-15T18:16:17-00:00 2001 Personal Communications, IEEE [see also IEEE Wireless Communications] 8 6 48 57 80211 wifi wlan http://www.citeulike.org/user/dcastro/article/2426206 <i>Communications Magazine, IEEE, Vol. 40, No. 5. (2002), pp. 172-180.</i><br /><br />At present, WLANs supporting broadband multimedia communication are being developed and standardized around the world. Standards include HIPERLAN/2, defined by ETSI BRAN, 802.11a, defined by the IEEE, and HiSWANa defined by MMAC. These systems provide channel adaptive data rates up to 54 Mb/s (in a 20 MHz channel spacing) in the 5 GHz radio band. An overview of the HIPERLAN/2 and 802.11a standards is presented together with software simulated physical layer performance results for each of the defined transmission modes. Furthermore, the differences between these two standards are highlighted (packet size, upper protocol layers etc.), and the effects of these differences on throughput are analyzed and discussed A comparison of the HIPERLAN/2 and IEEE 802.11a wireless LAN standards A Doufexi S Armour M Butler A Nix D Bull J Mcgeehan P Karlsson doi:10.1109/35.1000232 Communications Magazine, IEEE, Vol. 40, No. 5. (2002), pp. 172-180. 2008-02-25T18:09:58-00:00 2002 Communications Magazine, IEEE 40 5 172 180 80211 hiperlan wireless wlan http://www.citeulike.org/user/dcastro/article/2072408 <i>Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th, Vol. 3 (2003), pp. 1422-1426 Vol.3.</i><br /><br />The IEEE 802.11 standard specifies both radio and MAC protocol design. We observe that its CSMA protocol helps avoid much of co-channel interference by sharing radio resources in time at the potential expense of degraded network performance. Due to the coupling between the physical and MAC layers, conventional frequency allocation methods for typical cellular networks cannot be applied directly to the 802.11 networks. In this paper, by focusing on interactions among access points, we formulate the channel assignment problem for the 802.11 network, considering the traffic load at the MAC layer, and prove that the problem is NP-complete. In light of computational complexity, a heuristic algorithm is proposed and analyzed. The algorithm is then applied to two cellular settings with known optimal assignments for verification. For one of the settings, the proposed technique generates the optimal channel assignment. As for the second case of a large network, although only a suboptimal solution is obtained by the algorithm, it is shown to be excellent. Thus, as the 802.11 networks are widely deployed, the proposed method can serve as a valuable tool for frequency planning of networks with non-uniform coverage and load. Frequency assignment for IEEE 802.11 wireless networks KK Leung BJ Kim Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th, Vol. 3 (2003), pp. 1422-1426 Vol.3. 2007-12-07T10:17:07-00:00 2003 Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th 3 1422 1426 Vol.3 80211 frequency networks wireless http://www.citeulike.org/user/dcastro/article/771617 <i>Radio and Wireless Symposium, 2006 IEEE (2006), pp. 31-34.</i><br /><br />A zero-IF, 4.9-5.95 GHz, 2.3-2.5 GHz, transceiver is fabricated on a 0.18 /spl mu/m CMOS process. By using a fractional-N synthesizer, an integrated phase error of 0.6/spl deg/ (0.7/spl deg/) at 5 GHz (2.4 GHz) is achieved, while supporting fine frequency resolution. Digital calibration eliminates I/Q mismatch and achieves accurately matched baseband filters. The transceiver is compliant to 802.11a/b/g, while programmable bandwidth filters and an EVM of -35 dB in both transmit and receive, make it suitable for applications based on 802.16d/e. A dual-band 4.9-5.95 GHz, 2.3-2.5 GHz, 0.18 /spl mu/m CMOS transceiver for 802.11 a/b/g-802.16d/e I Vassiliou K Vavelidis N Haralabidis S Kavadias S Bouras G Kamoulakos C Kapnistis Y Kokolakis A Kyranas E Metaxakis S Plevridis P Merakos K Tsilipanos Radio and Wireless Symposium, 2006 IEEE (2006), pp. 31-34. 2006-07-24T16:24:44-00:00 2006 Radio and Wireless Symposium, 2006 IEEE 31 34 80211 80216 dual-band rf transceiver http://www.citeulike.org/user/dcastro/article/1921868 <i>Communications Magazine, IEEE, Vol. 45, No. 11. (2007), pp. 116-122.</i> Multihop Relaying for Broadband Wireless Mesh Networks: From Theory to Practice O Oyman JN Laneman S Sandhu doi:10.1109/MCOM.2007.4378330 Communications Magazine, IEEE, Vol. 45, No. 11. (2007), pp. 116-122. 2007-11-15T11:46:51-00:00 2007 Communications Magazine, IEEE 45 11 116 122 80211 80216 broadband network relay wifi wimax wireless http://www.citeulike.org/user/dcastro/article/1921643 <i>Communications Magazine, IEEE, Vol. 45, No. 11. (2007), pp. 108-114.</i> Outdoor Mobile Broadband Access with 802.11 P Alexander D Haley A Grant doi:10.1109/MCOM.2007.4378329 Communications Magazine, IEEE, Vol. 45, No. 11. (2007), pp. 108-114. 2007-11-15T10:46:48-00:00 2007 Communications Magazine, IEEE 45 11 108 114 80211 broadband mobile ofdm outdoor