MMSE and LS Interference Alignment Algorithm Based on Symbol Detection

The basic idea of Interference Alignment consists in precoding the transmitted signals such that they are aligned at the receiver where they constitute interference, while at the same time disjointed from the desired signal. In this paper, the minimum mean square error (SDA - MMSE) algorithm and the least squares (SDA - LS) algorithm based on symbol detection are proposed on the traditional MMSE algorithm and the least squares (LS) algorithm. Firstly, the iterative calculation is carried out based on the traditional algorithm, and then the iterative calculation is carried out by using the improved algorithm. The simulation results show that the proposed algorithm has better system performance than the traditional algorithm, and the system performance of SDA-MMSE algorithm is found to be optimal.