分布式STBC-OFDM交织深度优化  

Optimal Interleaving Depth in STBC OFDM System with Distributed Transmit Antennas

作　　者：官鹭[1] 邵士海[1] 唐友喜[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,成都611731

出　　处：《电子与信息学报》2011年第5期1141-1146,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60902027;60832007;60901018);基金项目(9140A21030209DZ02);中央高校基本科研业务费专项资金(ZYGX2009J008;ZYGX2009J010);国家863计划项目(2009AA01Z236)资助课题

摘　　要：该文在分布式发射天线场景下,考虑多径瑞利衰落信道,针对每个天线上分别采用交织分组子载波功率扩展的STBC-OFDM链路,提出了一种交织深度优化方法:根据分布式信道的多径数和多径时延,以最小化成对错误概率上界为目标,设置交织子载波分组的交织深度。在两发一收STBC,BPSK调制,由M.1225步行测试信道A,B组成的分布式场景下仿真,结果表明:当误比特率为10?3时,与传统方法相比,该文方法有1.5 dB的功率节省。Focusing on the STBC OFDM system where transmit power of data symbols are spreading on interleaving-grouped subcarriers of each distributed transmit antenna in Rayleigh fading channel,an optimal method for interleaving depth is proposed.According to the number of channel taps and the multi-path delays,the method searches the optimal interleaving depth to minimize the pair-wise error probability.Simulation results in distributed channel which is composed by M.1225 pedestrian test channel A and channel B show that the proposed algorithm has 1.5 dB gain at BER of 10？ 3compared to conventional method using BPSK modulation in STBC system with two transmit antennas and one receive antenna.

关 键 词：无线通信 空时分组码(STBC) 正交频分复用(OFDM) 分布式天线系统 交织子载波分组 

分 类 号：TN92[电子电信—通信与信息系统]