基于Turbo编码的超宽带系统性能分析  

Performance Analysis of UWB System Based on Turbo Coding

作　　者：陈煌林[1] 

机构地区：[1]漳州职业技术学院电子工程系,福建漳州363000

出　　处：《现代电子技术》2011年第13期56-58,61,共4页Modern Electronics Technique

摘　　要：为了降低严重的时间弥散影响,提出了一种Turbo信道编码方案引入超宽带系统中,分析和仿真了在不同无线室内环境下基于Turbo编码的超宽带系统的误比特率性能。无线室内环境是由IEEE 802.15.3a提出的修正的SV信道模型。为了降低迭代译码的复杂度,采用了LOG-MAP算法。仿真结果表明,相比于无编码的系统,具有Turbo编码的超宽带系统在不同无线室内环境下提供了可观的编码增益,随着迭代次数的增加,超宽带系统的性能得到了改善。In order to decrease severe time dispersion, a Turbo channel coding introduced into UWB system is put forward and the bit error rates performance of UWB system based on Turbo coding is analyzed and simulated in different wireless indoor environment. The indoor wireless environment is modeled as a modified Saleh and Valenzuela （SV） channel which is put forward by IEEE802.15.3a. To decrease complexity of the iterative decode, LOG-MAP algorithm is adopted. The simulation results show that comparing with the system without coding, UWB system with Turbo coding offers considerable coding gain. It demonstrates that the performance of the UWB system can be substantially improved by increasing the number of iteration.

关 键 词：TURBO码 跳时脉冲位置调制 超宽带 修正的SV信道 

分 类 号：TN911.22[电子电信—通信与信息系统]