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文中提出一种在异步多径瑞利衰落MC-CDMA系统上行链路中改进型的仿射投影算法。利用盲信号空间分离的方法,将期望用户的信道信息估计出来,再将其结果作为参数带入到改进型仿射投影滤波器中。在权向量更新的过程中,抵抗多址干扰(MAI)的影响,将期望用户的信息可靠的恢复。计算机仿真显示,在考虑远近效应时,该盲算法的性能与非盲的最小均方误差接收器的性能接近。
In this paper, an improved affine projection algorithm is proposed in the uplink of an asynchronous multi-path Rayleigh fading MC-CDMA system. Using the method of spatial separation of blind signals, the channel information of the desired user is estimated, and then the result is taken as a parameter into the improved affine projection filter. In the process of weight vector updating, the effect of multiple access interference (MAI) is resisted, and user information will be expected to be reliably recovered. Computer simulations show that the performance of the blind algorithm is close to the performance of a non-blind LSMS receiver when considering the near and far effects.