频域均衡联合干扰删除的频域实现方法  

Novel Frequency-Domain Implementation Method for Joint Frequency Domain Equalization and Interference Cancellation

作　　者：曹蕾[1,2] 张欣[2] 杨大成[2] 

机构地区：[1]中国移动通信研究院,北京宣武区100053 [2]北京邮电大学电信工程学院,北京海淀区100876

出　　处：《电子科技大学学报》2008年第6期818-822,共5页Journal of University of Electronic Science and Technology of China

摘　　要：针对重叠剪切法的频域均衡联合干扰删除接收算法,提出了一种新的低复杂度的频域实现方法。该方法利用重叠剪切的思想将每个迭代级中多用户干扰的重构方式由传统的时域线性卷积变换为频域相乘,并在频域删除重构的多用户干扰,可以降低接收算法的复杂度。仿真结果表明,该方法只是在较大信噪比下比时域实现方法的误码率性能略有损失,其他情况下两者相同;但是其计算复杂度比时域实现方法显著降低。A novel low-complexity frequency-domain implementation method is proposed for the receiving algorithm combined frequency domain equalization and interference cancellation. By using overlap-cut method, the multiuser interference （MUI） at each stage of iteration is regenerated by multiplication in frequency domain instead of by linear convolution in time domain, and then the regenerated MUI is cancelled in frequency domain. Simulation results show that the proposed method has slight bit-error-rate （BER） performance loss than conventional time-domain methods only at high SNRs, but the former is much simpler than the latter in computational complexity.

关 键 词：频域均衡 频域实现方法 频率选择性信道 干扰删除 重叠剪切 

分 类 号：TN929.533[电子电信—通信与信息系统]