分布式发射天线下BPSK Alamouti方案性能分析

分布式发射天线下BPSK Alamouti方案性能分析

内容简介：在分布式发射天线系统中,针对圆形小区下基于Alamouti空时分组编码和采用BPSK调制的情况,推导了误比特性能的近似解析表达式.理论推导过程考虑了路径损耗、阴影衰落、单径瑞利衰落和背景噪声的影响.在2发1收、单径瑞利衰落信道、200 m发射天线间距以及8 dB阴影标准差的条件下进行仿真,结果表明,所提方法的数值分析结果和计算机仿真结果是相吻合的,且在比特误码率为3×10-1时,与传统方法相比,该文方法在性能上有约1.4 dB的比特信噪比增益.

Abstract：An approximate expression of bit error rate (BER) is derived for a circular cell distributed antenna system with space-time block coding based on Alamouti's scheme and utilizing binary phase shift keying (BPSK) modulation.The analysis is carried out on considering the effects of path loss,log-normal shadowing,multipath fading and background noise.A simulation is carried out under the condition of two transmit and one received antennas,single-path Rayleigh fading channels,antenna spacing of 200 m,and standard deviation of shadowing of 8 dB.The simulation results show that,the numerical results match the simulation results well,and at the BER of 3× 10-1,the proposed method is superior by about 1.4 dB to the traditional methods in bit signal-to-noise ratio.

作者：李志刚, 唐友喜,

关键词：比特误码率, 分布式天线系统, 大尺度衰落, 空时分组码,