任意Nakagami衰落信道下2D-Rake接收机的性能分析

Performance Analysis of 2D-Rake Receiver in a Nakagami Fading Channel with Arbitrary Parameters

研究了单小区直扩码分多址(DS-CDMA)通信系统在任意Nakagami衰落信道下2D-Rake接收机的性能,推导出误码率的解析表示式.理论分析和数值计算结果表明,2D-Rake接收机获得了独立多径信号较大的空时分集增益,其误码率性能远优于普通的Rake或多天线接收机.系统的用户容量也有显著的提高.

Based on beamforming and conventional Rake technology, 2DRake receiver is composed of antennas array, timedelay, beamforming, coherent demodulation, despread, and maximum rate combing (MRC). In Nakagami fading channel with arbitrary parameter, the bit error rate (BER) of 2DRake receiver is investigated for single cell coherent DSCDMA system. Theoretic analysis and numerical results indicate that 2DRake receiver can achieve the spacetemporal gain from independent multipath component, and its BER get an advantage over the conventional Rake receivers or the multiantenna receiver. The number of users supported by the system is also increased in a great deal.