一种多级迭代干扰消除多用户检测算法

Multiuser detection algorithm with interference cancellation by multistage iterative for fast-FHMA systems

提出了快跳频多址通信多级迭代干扰消除多用户检测算法.该算法首先使用传统检测器对只有惟一最大行的用户做出正确译码,对于有多个最大行的用户进行迭代干扰消除.在迭代干扰消除中,对干扰数据信干功率比进行估计,若干扰频点没有受到其他信号的重叠干扰,则在迭代中被消除,否则继续迭代,直到所有用户译码完成.该算法具有线性的复杂度,消除了Fiebig多级干扰消除算法的错误传播,仿真结果表明提出的多级迭代干扰消除算法性能优于其他多用户算法.

A multiuser detection algorithm for the communication systems with fast frequency hopping multiple accesses （fast-FHMA） was presented. The users only with a maximum row in the received T-F matrix were coded correctly by conventional detectors; for the other users with many maximum rows, the interference were canceled by iterative. If the symbol of the interference data was only a single one and was not interfered by other users repeatedly, then the corresponding cell data in T-F matrix would be zero. Otherwise it was iterated next until all the users were recoded correctly. The algorithm with complexity, that is only linear in the number of users, could cancel the outspread error of Fiebig＇s detection. The simulation results showed that multiuser detection algorithm would be superior to the conventional detection （CD）, the iterative interference cancellation and MS-MUD detection.