摘要
本文针对工作于慢变频率选择性Rayleigh衰落信道中的部分相干的MC-DS-CDMA系统,基于随机相位误差的Tikhonov密度分布提出了误码率上边界的一种分析方法。仿真结果表明,随着环路信噪比的增加,相位误差损耗所产生的系统误码率性能损失变得越来越小,当环路信噪比高于系统信噪比(Eb/N0)20dB时,系统误码率性能损失小于0.2dB。在MC-DS-CDMA系统中,由于能用频率分集取代路径分集,因而接收机结构更易实现。
Based on the Tikhonov density distribution of stochastic phase error, An analytic method of the bit-error rate (BER) upper bound for partially coherent multicarrier DS-CDMA system operating over slow-variable frequency-selective Rayleigh fading channels is proposed. Simulation results show that the system BER degradation arising from the phase error loss becomes increasingly less as the loop SNR is increased. When the loop SNR is 20dB above the system SNR(Eb/N0), the system BER degradation is only less than 0.2dB. Since the path diversity can be replaced by the frequency diversity in multicarrier DS-CDMA systems, the receiver structure is easier to be implemented.
出处
《电路与系统学报》
CSCD
2004年第3期18-22,共5页
Journal of Circuits and Systems
基金
江苏省自然科学基金资助项目(BK2001036)
