一种新的多电平调制BICM Turbo均衡方法

A new BICM Turbo equalization by multi-level modulations

Turbo均衡结合信道译码提高了性能,但是用到SISO均衡器和译码器,对于多电平调制情况复杂度太高,在复杂信道中应用受限。提出比特交织编码调制BICM,使用改进的MMSE-DFE实现Turbo均衡,大大降低复杂度,且具有结构简单、计算量小、可扩展性强、适合工程实现的特点,并通过仿真验证性能。

Turbo equalization combined equalization with decoder,improved the equalization,but which used soft-in-soft-out equalizer and decoder which were too complexity when the system used multi-level modulations over the complex channel.Proposed bit-interleaved coded modulation（BICM）with improved minimum mean square error decision feedback equalizer（MMSE-DFE）to accomplish Turbo equalization,made the complexity much lower and had the characteristic of simple structure,less compution,strong expansibility and can be implemented easily in project.Simulation results show that the proposed method obtained better performance.