摘要
针对时变瑞利衰落信道,提出多接收天线下两种新的空时分组码解码算法。由于多普勒频移和载频偏移,引起信道的时间选择性衰落,信道时间选择性衰落引起发送天线间互干扰(intertransmit antennas interfer-ence,ITAI)。所提方案中信道用一阶自回归模型建立,在多接收天线时,通过分集增益合并(diversity advantagecombiner,DAC)后,采用约束置零或cholesky分解的方法移除发送天线间互干扰。最后针对不同变化系数的衰落信道给出计算机仿真结果,结果表明提出的方案表现出了更好的性能。
Two kinds of new decoders are proposed for space-time block codes using multi received antennas over time-selective Rayleigh fading channel that arise due to Doppler shifts and carrier frequency offsets. Time-selective fading causes the intertransmit antennas interference(ITAI). Modeling the channel as AR1 autoregressive model, the proposed decoder performs robust performance to remove ITAI by restricted zero-forcing method or cholesky decomposition after diversity advantage combining(DAC) at receiver. The better performance is shown by simulation results presented for various channel-fading rates.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2006年第8期1141-1143,1193,共4页
Systems Engineering and Electronics
基金
哈尔滨工程大学基础研究基金资助课题(HEUF04103)
关键词
空时分组码
时变瑞利衰落信道
多接收天线
解码算法
space-time block codes
time-selective Rayleigh fading channel
multi-received antenna
decoder