关键词: 多输入多输出, 干扰对齐, 干扰抑制

Abstract:

Interference alignment (IA) is one of the promising technologies to solve the co-channel interference in wireless communication systems.It can provide better spatial multiplex gain than other interference management methods.Based on consideration of engineering applications,the realization of interference alignment for multi-cell MIMO system is studied in this paper.Firstly,the performances of classical algorithm based on closed-form solution and typical distributed iterative algorithms in system capacity and convergence are analyzed and compared in independent and identically distributed channel.Secondly,the performances of the algorithms in spatial-correlated channel are simulated and analyzed for the future Massive MIMO technology.Finally,the applications of the algorithms in different communication systems are summarized.Simulation results show that the distributed iterative algorithm based on matrix-projection distance offers the best overall performance.

Key words: multiple input multiple output;interference alignment;interference suppression