一种基于分布式发射天线的差分空时调制方法  

Differential Space Time Modulation with Distributed Transmit Antennas

作　　者：孙德福[1] 唐友喜[1] 邵士海[1] 李少谦[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610054

出　　处：《电子与信息学报》2008年第3期759-762,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60272009;60572090;60472045;60496313);教育部博士点基金(20050614009)资助课题

摘　　要：在基于分布式发射天线的多入多出(MIMO)系统中,由于各发射天线的发射信号不同时到达接收端,用于信道估计的导引设计及发射方法存在一定困难。针对这一问题,该文提出一种无需信道估计的分布式MIMO差分编码及检测方法:发送端将发射矩阵进行相位差分调制后发射,接收端利用前后接收量判断相位信息恢复出发送端数据信息。该方法频谱效率与V-BLAST相同,适用于任意发射天线数和接收天线数,且不要求接收天线数大于发射天线数。仿真结果表明,在不同信道传播时延情况下,误码率性能不同。It is difficult to estimate channel knowledge in multiple input multiple output system which based on distributed antenna structure because the transmit signals are received asynchronously. Aiming at this matter, a differential encoding and detection scheme is proposed where channel estimation is not needed. The proposed scheme has the same spectral efficiency as V-BLAST scheme and can be applied to any number of transmit antenna and receive antenna, besides the number of receive antenna can be less than transmit antenna. The simulation results show that the BER performance is different corresponding to different channel propagation delay.

关 键 词：分布式发射天线 分布式多入多出 信道传播时延 差分检测 

分 类 号：TN914[电子电信—通信与信息系统]