联合 MMSE 和 PIC 的 DS-CDMA 单载波频域均衡

摘要

The single ⁃ carrier overlap ⁃ cut frequency ⁃ domain equalization (OC ⁃ FDE) proposed recently requires no GI (Guard interval)inserted between data blocks,having almost the same BER performance. OC⁃FDE combined with parallel inter⁃ference cancellation(PIC),named OC⁃PIC⁃FDE is a low complexity frequency⁃domain implementation method,with good BER performance. Based on the method,this paper proposed the improved method,by inferring the MMSE factors related to the us⁃er,jointing MMSE and PIC. The simulation results show the improved method has the same complexity compared with OC⁃PIC⁃FDE,but the BER performance is better.%　　重叠剪切频域均衡联合并行干扰消除(OC⁃PIC⁃FDE)是一种较低复杂度的实现方法，能取得良好的误码性能。基于该方法，通过联合 MMSE(最小均方误差)和并行干扰对每个用户求出最优的 MMSE频域均衡系数，实现对原方法的改进。仿真结果表明，改进后的方法与原 OC⁃PIC⁃FDE相比，计算复杂度几乎相同，但误码性能却可以得到很大提高。