一种改进的多用户自适应调制信道均衡算法

Improved Channel Equalization Algorithm Based on Multi-User Self-Adaptive Modulation

在多用户自适应调制系统中,由于多用户复用调制星座,各用户之间形成很强的共道干扰,在此情况下使用传统的信道均衡算法将使系统性能恶化。本文提出一种改进的信道均衡算法,该算法的核心是在信道均衡时自适应地采用多用户联合检测,从而提高信道均衡的准确性。仿真结果表明,新算法较传统算法具有大约1dB的增益。

Due to the multiplexing, the user has a strong co-channel interference with each other in the multi-user self-adaptive modulation system. In this case the system performance could be deteriorated by the traditional channel equalization algorithm, so an improved channel equalization algorithm is brought forward in this paper. The key point in this algorithm is to use the multi-user joint detection method to improve the veracity of the channel equalization. The simulation results show that the new algorithm has about ldB increment.