快跳频多址通信多级迭代干扰消除多用户检测  

Multistage Iterative Interference Cancellation Multiuser Detection for Fast FHMA System

作　　者：刘传清[1,2] 胡修林[1] 张蕴玉[1] 

机构地区：[1]华中科技大学电信系 [2]襄樊学院物电系,襄樊441053

出　　处：《信号处理》2007年第1期54-57,共4页Journal of Signal Processing

摘　　要：提出了多级迭代干扰消除快跳频多址多用户检测算法。首先使用传统检测器检测,对只有一个最大行的用户做出正确译码,对相应时频矩阵元素进行信干噪声功率比估计,确定干扰消除迭代权值,然后,对干扰元素做加权运算,逐渐消除干扰,直到所有用户译码完成。该算法消除了迭代中权值估计带来的误差,计算量同用户数成线性关系。仿真结果表明：提出的多级迭代干扰消除算法性能优于文献中的多用户检测算法,特别是在用户数较多时性能有较明显改善。A multistage iterative interference cancellation multiuser detection algorithm is presented for fast frequency-hopping multiple access communication systems. At first, we exploit conventional detector decide majority row in the receive T-F matrix and identify the single majority row which is multiuser interference with high probability. Then estimate correspond of signal to interference plus noise power ratio（SINR） and make a decision weighting factor,Next we can cancel interference by step of step with a variety weighting factor until all the users correct receded. Proposed algorithm cancels the estimation error of constant weighting factor and has only a linear complexity with the number of users. Simulation results show that proposed schemes have the best performance than other detector in beth nonfading and fading channels,especially in large number of user.

关 键 词：多用户检测 跳频多址通信 干扰消除 多级迭代 

分 类 号：TN914.5[电子电信—通信与信息系统]