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An adaptive multistage parallel interference canceller for CDMA systems over frequency selective fading channels

机译:在频率选择性衰落信道上用于CDMA系统的自适应多级并行干扰消除器

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摘要

In this paper, a bit inversion (BI) procedure in previous works is further investigated over multipath frequency selective fading channels for DS-CDMA communication systems. Moreover, after the BI procedure performed with partial parallel interference cancellation (PPlC) schemes where the partial cancellation weight (PCW) is adapted by the least mean square (LMS) adaptive filtering algorithm, a full PIC is performed to closely cancel the multiple access interference (MAI). Simulation results show that the proposed four-stage BI-based full PIC (BI-FPIC) detector closely cancels the MAI over a two-path frequency selective fading channel and outperforms the LMS-based PPIC schemes.
机译:本文针对DS-CDMA通信系统中的多径频率选择性衰落信道,进一步研究了先前工作中的位反转(BI)过程。此外,在通过部分并行干扰消除(PPlC)方案执行的BI程序(其中部分消除权重(PCW)通过最小均方(LMS)自适应滤波算法进行了调整)之后,执行了完整的PIC来紧密消除多址干扰(MAI)。仿真结果表明,所提出的四级基于BI的全PIC(BI-FPIC)检测器可在两路径频率选择性衰落信道上紧密抵消MAI,并且优于基于LMS的PPIC方案。

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