【摘要】 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。更多还原

【Abstract】 A modified affine projection algorithm(APA) is proposed for uplink asynchronous multicarrier code-division multiple-access(MC-CDMA) systems with multipath Rayleigh-fading channel. The channel estimation of desired user is carried out through subspace separation,then the result is put into the modified affine projection filter as a parameter. During the update of the weight vector,the multiple access interference(MAI) is suppressed and the information of desired user reliably recovered. Computer simulation result shows that the performance of this modified algorithm is close to that of the non-blind minimum-mean-square error(NB-MMSE) receiver in severe near-far scenarios.更多还原