基于IEEE802.11a无线标准的STC-OFDM系统性能研究

被引：0
|
作者：
吕波
李云
周杰
机构：
[1] 南京信息工程大学电子与信息工程学院
来源：
电子技术应用 | 2010年 / 36卷 / 09期
关键词：
IEEE802.11a; 正交频分复用(OFDM); 空时编码(STC); STC-OFDM;
D O I：
10.16157/j.issn.0258-7998.2010.09.026
中图分类号：
TN919.3 [数据传输技术];
学科分类号：
摘要：
提出了使用正交频分复用(OFDM)技术减少码间干扰(ISI)来改善频率选择性衰落信道下空时编码(STC)性能的合理方案。在IEEE802.11a无线标准下对STC与OFDM技术相结合后的STC-OFDM系统进行了理论分析,通过仿真对系统性能进行了评估。仿真结果表明,空时分组编码(STBC)与OFDM技术的结合优于垂直的贝尔实验室分层空时方案(VBLAST)与OFDM技术的结合;FFT点数与子载波数对系统性能有一定的影响;随机交织器有助于显著改善多径衰落信道下系统性能,并能在各种信道上达到合理的鲁棒性。
引用
收藏
页码：133 / 137
页数：5
相关论文
共 11 条
  • [1] Optimal Training Signals for MIMO OFDM Channel Estimation. Hlaing Minn,Naofal Al-Dhahir. IEEE Trans onWireless Communications . 2006
  • [2] Channel estimation and signal detection for space division multiplexing in a MIMO-OFDM system. Y Ogawa,K Nishio,T Nishimura,T Ohgane. IEEE Transactions on Communications . 2005
  • [3] Space-time codes and MIMO systems. M. Jankiraman. . 2004
  • [4] IEEE Std.ISO/IEC8802-11/And1 . 1999
  • [5] A new branch metric generation method for soft-decision Viterbi decoding in coded OFDM-SDM systems employing MLD over frequency selective MIMO channels. HORI S,MIZOGUCHI M,SAKATA T,et al. IEICE Trans-actions on Fundamentals . 2002
  • [6] Space-time coded OFDM for high data-rate wireless communication over wideband channels. Agrawal D,Tarokh V,Naguib A,et al. Proceedings of the 48th IEEE Vehicular Technology Conference . 1998
  • [7] Implementation of a MIMO OFDM-based wireless LAN system. van Zelst A,Schenk TCW. IEEE Transactions on Signal Processing . 2004
  • [8] Optimal Training Sequences and Pilot Tones for OFDM Systems. Manton J H. IEEE Communications Letters . 2001
  • [9] Optimal training design for MIMO OFDM systems in mobile wireless channels. Barhumi I,Leus G,Moonen M. IEEE Transactions on Signal Processing . 2003
  • [10] A Space-Time Block-Coded OFDM Scheme for Unknown Frequency-Selective Fading Channels. M Uysal,N AI-Dhahir,C N Georghiades. IEEE International Symposium on Personal, Indoor and Mobile Radio Communications . 2001
12