用于分层调制的MMSE线性分层均衡算法

Hierarchical MMSE Linear Equalization for Multi-Layer Modulation

  • 摘要: 以使用分层编码调制的通信系统为背景,详细介绍了采用最小均方误差(MMSE)线性均衡算法的分层均衡的基本原理和方法,并针对采用格雷映射4-QAM的分层调制为例,推导了均衡器外信息的计算方法,提出一种新的可以用于分层调制的分层均衡技术。仿真结果表明新的分层均衡算法与传统标准均衡相比,不仅可以用于分层高阶调制中,而且在不损失BER性能的前提下,大大降低了计算分层调制的均衡器外信息的复杂度。

     

    Abstract: A simplified hierarchical equalizer's extrinsic information of base-layer for 4-QAM multi-layer modulation is presented. A new hierarchical equalization method of base layer is applied to multi-layer modulation. Simulation results show that the proposed hierarchical equalization method works effectively for multi-layer modulations and the simplified equalizer's extrinsic information algorithm is able to reduce the calculation complexity degrees of equalizer's extrinsic information without the loss of bit error rate (BER) performance.

     

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