迭代多用户联合检测与参数估计:一种因子图方法

Proceedings 2001 IEEE Information Theory Workshop (Cat. No.01EX494) Pub Date : 2001-09-02 DOI:10.1109/ITW.2001.955128

G. Caire, A. Tulino, E. Biglieri

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引用次数: 20

摘要

我们研究了一个具有同步DS-CDMA的多址AWGN信道，其中信道幅度和噪声方差参数是先验未知的。提出了一种基于软干扰抵消和软决策驱动最小二乘估计的迭代联合多用户译码器和参数估计器。我们的推导是通过对信息位和未知信道参数的联合后验概率测度的因子图应用和积算法得到的。

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Iterative multiuser joint detection and parameter estimation: a factor-graph approach

We examine a multiple-access AWGN channel with synchronous DS-CDMA in which the channel amplitude and noise variance parameters are unknown a priori. We derive an iterative joint multiuser decoder and parameter estimator based on soft interference cancellation and on soft decision-driven least-squares estimation. Our derivation is obtained by applying the sum-product algorithm to the factor graph of the joint a posteriori probability measure of the information bits and of the unknown channel parameters.

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Proceedings 2001 IEEE Information Theory Workshop (Cat. No.01EX494)

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