衰落信道中的DS/CDMA系统盲差分自适应接收机

在本文中，我们针对标准MMSE自适应接收机在频率非选择性衰落信道中的相位滑动和失锁问题，提出了一种无需进行训练和信道参数估计的盲差分自适应接收机。为自适应地实现该接收机，我们同时提出了一种基于正交分解的盲平均随机梯度（Orthogonal Decomposition-based Blind Aver-aged stochastic Gradient，简称ODBAG）算法。仿真结果表明，这种以ODBAG算法实现的盲差分自适应接收机在瑞利（Rayleigh）衰落信道中，误码率性能比传统匹配滤波器（Matched Filter，简写为MF）接收机有显著的提高，并接近改进的MMSE自适应接收机的性能。

A Blind Differential Adaptive Receiver for DS/CDMA Systems in Fading Channels

It is known that the standard MMSE receiver will often lose phase lock on the desired signal when the desired signal dips into a deep fade in frequency-nonselective-fading channels. To overcome above problem, a differential blind adaptive receiver is proposed. In addition, the Orthogonal Decomposition-based Blind Averaged stochastic Gradient (ODBAG) algorithm is proposed to implement the blind differential adaptive receiver adaptively. Through computer simulation, it is shown that the proposed receiver provides bit error rate performance significant over the match filter receiver and comparable to the modified MMSE receiver with perfect phase recovery.