短波宽带通信系统中LDPC码的应用分析  

Application of LDPC codes in the short-wave wideband communication system

作　　者：方秋晓[1,2] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001 [2]空军大连通信士官学校无线室,大连116600

出　　处：《信息技术》2012年第3期161-164,共4页Information Technology

摘　　要：针对短波宽带信道时变衰落色散的特性,为减小多径效应以及空间噪声、干扰等不利因素的影响,改善短波通信质量,采用高效纠错编码LDPC码,结合扩频OFDM技术,设计了一种适用于短波宽带信道的编码调制系统结构,仿真结果显示:系统能够显著提高短波宽带通信系统的误码性能,为短波宽带通信提供了一种可靠、有效的设计方案。According to the characteristic of short-wave wideband channel which is a fading and time-dispersive,in order to reduce many unfavorable factors like the multi-path effect,the noise and interference,improve the quality of short-wave communication,in this paper efficient error correction coding using LDPC codes,OFDM technology combined with spread spectrum,a modulation coding system structure is designed for the short-wave wideband channel.The simulation results show the system can significantly improve the BER of short-wave wideband communication system,for the short-wave wideband communication provides a reliable and effective design.

关 键 词：短波宽带信道 LDPC码 扩频 OFDM 

分 类 号：TN911.7[电子电信—通信与信息系统]