It mainly contains the digital modulate system, the SS communication theory and the direct sequence spread spectrum (DSSS) system.

主要是数字调制系统、扩展频谱通信原理和直接序列扩频系统等内容。

youdao

Spread Spectrum (SS) communication is a kind of communication system with excellent performance, and has attracted wide attention and interest of researchers since it was born.

扩频通信是一种有着极其优异性能的通信方式，自其诞生之日起就受到了广泛的关注。

youdao

FSK-SS communication system has higher transmission efficiency as compared with direct series spread spectrum (DS-SS) communication system.

与通常的直接序列扩颗通信方式(DS - SS)相比，移频键控多值传送扩颗通信方式(FSK - SS)具有传输效率高的特点。

youdao

FSK-SS communication system has higher transmission efficiency as compared with direct series spread spectrum (DS-SS) communication system.

与通常的直接序列扩颗通信方式(DS - SS)相比，移频键控多值传送扩颗通信方式(FSK - SS)具有传输效率高的特点。

youdao