空频分集MIMO-OFDM系统的DFE-SDR算法仿真  

DFE-SDR Simulation for SFD-MIMO-OFDM System

作　　者：杨斌[1] 龚萍[2] 李永华[2] 吴伟陵[2] 

机构地区：[1]国家电网公司,北京100031 [2]北京邮电大学,北京100876

出　　处：《系统仿真学报》2008年第7期1934-1937,共4页Journal of System Simulation

基　　金：国家自然科学基金资助项目(90204001)

摘　　要：研究了空间频率分集MIMO-OFDM系统的DFE-SDR译码算法,提出了一种能充分利用空间分集、空间复用、频率复用增益,且能对抗时间选择性和频率选择性衰落的空时频率分集MIMO-OFDM系统,结合判决反馈均衡(DFE)以及半定松弛检测(SDR)的优点,经过推导得到一种应用在空时频率分集MIMO-OFDM系统的DFE-SDR检测方法,该算法能同时得到较理想的系统性能和算法复杂度。根据该算法给出了具体的系统仿真分析过程,证明该算法与DFE检测算法相比,误码率性能得到了较大提高,是一种有实用价值的译码算法。A spatial multiplexing and diversity joint transmit structure for MIMO-OFDM （Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing） system was proposed. Space-Frequency Block Coding （SFBC） is used over its all spatial multiplexing layers to obtain both space diversity and frequency diversity （SFD） gain. According to the idea of DFE and Semi-definite Relaxation （SDR） detection, a joint DFE and SDR detection algorithm for SFD-M1MO-OFDM system was proposed. The algorithm can achieve a good trade-off of complexity and BER performance. Detailed simulations analysis processes are proposed which prove that the BER performance improved greatly compared with generic DFE detector after the algorithm is applied in SFD-MIMO-OFDM system.

关 键 词：空频分集 MIMO-OFDM DFE-SDR 仿真 

分 类 号：TN911.23[电子电信—通信与信息系统]