Minimum probability of error of many-user CDMA without power control
Minimum probability of error of many-user CDMA without power control
复制标题
无功率控制的多用户CDMA的最小错误概率
DOI：
10.1109/isit.2002.1023460
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
S. Verdú
中科院分区：
文献类型：
--
作者：
Dongning Guo;S. Verdú
证明了多用户CDMA的最小误差概率（最优）检测器等效于一个条件均值估计器，该估计器找到所谓的贝叶斯反向信道的随机输出的均值。利用统计力学工具研究自旋玻璃的宏观性质，使得贝叶斯反通道与自旋玻璃的等效性可以在大系统极限下精确地确定最佳误码率。研究发现，所有用户，无论其个人接收能量如何，都具有相同的多用户效率，这与条件平均估计量的均方误差直接相关。
The minimum-probability-of-error (optimal) detector of multiuser CDMA is shown to be equivalent to a conditional mean estimator which finds the mean value of the stochastic output of a so-called Bayes retrochannel. The equivalence of the Bayes retrochannel to a spin glass allows the optimal bit-error-rate to be determined exactly in the large-system limit by studying macroscopic properties of the spin glass using tools developed in statistical mechanics. It is found that all users, regardless of their individual received energies, enjoy the same multiuser efficiency, which is directly related to the mean-square error of the conditional mean estimator.