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中文摘要：
在衰落信道下,提出了具有加权抵消的线性并行干扰消除多用户检测器（weight-cancelled linear parallel interference canceller,WLPIC）,不同于传统的线性并行干扰消除检测器（linear parallel interference canceller,LPIC）估计多址干扰的方法,WLPIC利用前一级软输出乘以一个相应的加权系数来恢复后一级期望用户信号中的多址干扰,并进行干扰抵消。基于最小均方误差准则,给出了加权系数的计算公式。对WLPIC进行了误码性能分析。理论分析和仿真结果表明,WLPIC能有效地克服远近效应,性能优于LPIC和匹配滤波检测器。
英文摘要：
A weight-cancelled linear parallel interference canceller（WLPIC） on fading channels is presented.Unlike the conventional linear parallel interference canceller（LPIC）,WLPIC estimates and cancels the multiple access interference（MAI） for a desired user in a stage through using the weighed factors to weight all the other users＇ soft outputs from the previous stage.The weighted factor formula for different stages is derived from the minimum mean square error（MMSE） criterion,and the BER performance of WLPIC is discussed.Theoretical analysis and simulation results show that WPLIC has robustness to near-far effect and outperforms LPIC and the MF detector significantly.
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