摘要
国际电信联合会在3GPP标准中推荐采用3GPP交织器,它在Turbo码中有优异的性能。本文在介绍3GPP交织器的基础上,对Turbo码的距离谱进行了分析,提出了一种3GPP交织器在低信噪比条件下的改进方案。通过仿真表明,在基本不改变原交织器的设计步骤情况下,改进方案精简了交织器的结构,并通过对短帧进行填充的方式,达到较长的交织长度,改善了短帧在低信噪比条件下传输的误码性能。
The International Telecommunications Union recommended the 3GPP standard use the 3GPP interleaver, it has excellent performance in Turbo codes. This paper base on the introduction of the 3GPP interleaver, then the distance spectrum of Turbo codes was analyzed, and an inproved 3GPP interleaver applied under low signal-to-noise ratio condition was presented. The simulation shows, on the condition of design steps of the basic intedeaver does not change, the improve method simplify its structure, and the short frames through fill to a longer interleaver length, so the transmission BER of the short-frame at low SNR conditions was improved.
出处
《信号处理》
CSCD
北大核心
2010年第3期448-452,共5页
Journal of Signal Processing
基金
重庆市自然科学基金(2008BB2168)
