数字跳频系统CVSD编码性能优化研究  

Research on Performance Optimization of CVSD Coding in Digital FH System

作　　者：黄小刚[1] 曾现巍[2] 陈建忠[2] 

机构地区：[1]解放军理工大学通信工程学院,江苏省南京市210007 [2]总参谋部第六十三研究所,江苏省南京市210007

出　　处：《电子工程师》2007年第7期14-17,共4页Electronic Engineer

摘　　要：为了解决在受阻塞干扰的跳频信道上语音质量受影响严重的问题,对以传输语音为主的数字跳频系统采用CVSD(连续可变斜率增量调制)编码时的编码算法进行了优化研究。在传统CVSD编码基本原理的基础上,提出了一种新的CVSD编码优化算法,并给出了数字跳频系统中语音质量衡量准则和基于优化算法的数字跳频系统CVSD基带仿真模型,具体分析了在部分频带噪声干扰下优化算法对系统接收语音信号恶化量的影响。仿真结果表明,优化算法较之传统CVSD编码算法能有效地控制接收语音信号恶化量,即使在受阻塞干扰十分严重的情况下也能获得较好的语音质量。To solve the problem of the low speech signal quality on the FH channels with wideband rejective interference, the performance optimization of CVSD coding in the digital FH system is studied. A new CVSD coding algorithm is designed based on the principle of traditional CVSD coding. Then the rule for measuring the quality of speech signal is offered and the simulation method of digital FH system with baseband model based on the optimized CVSD coding algorithm is presented. In the end, the influence of the received speech signal＇ quality loss in the digital FH system with partial-band noise jamming based on optimized algorithm is analyzed. The simulation results show that compared with the traditional CVSD coding, the optimized CVSD coding algorithm can control availably the quality loss of the received speech signal, it can obtain better speech quality even if with the serious wideband rejective interference.

关 键 词：数字跳频系统 语音通信 CVSD 恶化量 仿真 

分 类 号：TN912.3[电子电信—通信与信息系统]