一种改进的并行干扰抵消检测算法

An Improved Parallel Interference Cancellation Algorithm Based on Minimum Mean Square Error Estimation(MMSE)

为了抑制V-BLAST系统的多流干扰,最优算法是最大似然检测算法,但由于该算法计算复杂度太高而无法实际应用。针对该问题,给出一种新的检测方案,即首先采用最小均方误差算法进行初始估计,再采用改进的并行干扰抵消算法来抑制多流干扰。仿真结果表明,该算法有较强的抗多流干扰能力,性能接近最大似然检测算法,但其复杂度较低且时延较小。

In order to mitigate the MSI(Multi-stream interference) in V-BLAST system,the optimal algorithm is the Maximum Likelihood Detection Algorithm,but it is not practical with high computation complexity.In this paper,a new detection scheme is given to solve the problem.Improved parallel interference cancellation signal gives one kind of new examination plan in view of this problem.At first,the scheme gets an initial estimation according to the minimum mean square error method,on the basis of exploring the improved parallel interference canceller for mitigating MSI.The simulation results show that the algorithm proposed has a strong ability of anti-multi-stream interference,the performance is close to the maximum likelihood detection algorithm,but it is of less time delay with low complexity.