DS-CDMA中一种低复杂度的多用户检测算法  

A Low Complexity Multi-user Detection Algorithm in DS-CDMA System

作　　者：胡观华[1,2] 李有明[1,2] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211 [2]宁波大学通信技术研究所,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2010年第1期34-37,共4页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(60772126);宁波市自然科学基金(2006A610002)

摘　　要：为降低常规解相关多用户检测算法的运算量和复杂度,利用相关矩阵的对角占优性提出了一种低复杂度的三对角线性检测算法.新算法首先将相关矩阵分解为三对角矩阵及其余式,然后将相关矩阵的求逆问题近似为特殊矩阵的乘法问题.与解相关检测算法相比,新算法运算复杂度大大降低,而检测性能良好.计算机仿真结果验证了新算法的有效性.In order to reduce the computational complexity of conventional decorrelating multi-user detection algorithm, we propose a lower complexity tri-diagonal linear detection algorithm based on the diagonal dominance property of correlation matrix. In the algorithm, the correlation matrix is first split into a tri-diagonal matrix and matrix with residual elements, the inversion of correlation matrix can then be obtained by approximating it to the special matrix multiplication. Compared with the conventional deeorrelating multi-user detection algorithm, the proposed algorithm has much lower complexity while maintaining a good performance. The efficiency of the presented algorithm is verified by the computer simulation results.

关 键 词：多用户检测 多址干扰 解相关 对角占优 线性检测 

分 类 号：TN92[电子电信—通信与信息系统]