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用於寬頻分碼多工系統之次最佳多用戶偵測演算法

Suboptimal Multiuser Detectors for W-CDMA System

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摘要


本文係在探討次最佳化多用戶偵測技術,共推導出兩個用於W-CDMA系統之次最佳多用戶偵測演算法,這些演算法的最大特質在於它們的計算量大約祇與使用者數成線性增加,另外它們是基於最大可能性(Maximum-Likelihood)的演算法,可以搭配先前其他人所發展的偵測方法使用,利用它做初值估計,再使用我們所提出的方法去更進一步估計,以求取更好的結果。

並列摘要


In this paper, we study the .suboptimal multiuser detection techniques and two suboptimal multiuser detection algorithms for W-CDMA system are proposed. Both the computation load and memories needed by these two algorithms are linearly proportional to the user number of the system. On the other, these algorithms are nonlinear search maximum-likelihood algorithms. One can use the result obtained by correlation method or the other (linear or nonlinear suboptimal multiuser detection) algorithm as the initial guess needed in our algorithms to obtain the more accurate result in advance.

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