Low complexity adaptive iterative receiver for layered space-time coding CDMA systems

2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2005-09-11 DOI:10.1109/PIMRC.2005.1651876

C. Teekapakvisit, Yonghui Li, V. Pham, B. Vucetic

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引用次数: 1

Abstract

It is well known that an adaptive frequency domain receiver can dramatically reduce the detection computation complexity of a communication system compared to standard time domain receiver. In this paper, we propose a new low complexity frequency domain adaptive and iterative receiver for a layered space-time coded CDMA (LSTC-CDMA) system with no knowledge of channel state information (CSI), spreading sequences, and the fading coefficients, except a training sequence for each user. The proposed low complexity receiver consists of a normalized LMS feed forward filter and a feedback iterative parallel interference canceller in frequency domain. The proposed frequency domain receiver has a significant reduction in computation complexity and achieves the same performance compared to a time domain receiver. Our simulation results exhibit that the proposed adaptive iterative receiver can also approach the interference-free single user performance for a certain range of the signal to noise ratio (SNR)

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分层空时编码CDMA系统的低复杂度自适应迭代接收机

众所周知，与标准时域接收机相比，自适应频域接收机可以显著降低通信系统的检测计算复杂度。本文针对分层空时编码CDMA (LSTC-CDMA)系统，提出了一种新的低复杂度频域自适应迭代接收机，该接收机不知道信道状态信息(CSI)、扩频序列和衰落系数，只知道每个用户的训练序列。所提出的低复杂度接收机由归一化LMS前馈滤波器和频域反馈迭代并行干扰消除器组成。与时域接收机相比，所提出的频域接收机具有显著降低计算复杂度和达到相同性能的优点。仿真结果表明，所提出的自适应迭代接收机在一定信噪比范围内也能接近无干扰单用户性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications

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