一种新的不需要帧同步模数模加密方案

A New Analog-Digital-Analog Scrambling Scheme Not Requiring Synchronization

本文提出一种新的不需要帧同步模-数-模语音加密方案,称为频域幅相分离置换和幅度修正组合加密方法。理论分析和计算机模拟结果表明:这种方法和L.S.Lee体制相比,具有更高的安全性,在异步解密的情况下,没有非线性相位失真,因而恢复语音质量更高。

This paper proposes a new analog-digital-analog speech scrambling scheme, which uses frequency-domain amplitude-phase separate permutation and amplitude modification algorithm. It is shown by analysis and simulation that the scheme has greater security over L. S. Lee's system and can work under asynchronous condition without non-linear phase distortion.