Research on Performance Optimization of CVSD Coding in Digital FH System
Cheng Jian-zhong · Electronic Engineer · 2007
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.