本文阐述了扩频技术的优点、各种扩频系统（直接扩频、跳频和混合系统）的原理和主要参数，以及国际上的规定。
This paper expounds the advantage of spread spectrum, principle and important parameters of the system, and the international regulation.
跳频技术是扩频通信中的一种抗干扰的实用技术。
Hopping frequency (FH) communication technology is the important part of spread spectrum communication, which is widely applied in anti-jamming communication.
在扩频通信技术中，直接序列扩频和跳频是应用最广的两种扩频技术。
In the spread spectrum communication, direct sequence spread spectrum (DSSS) and frequency hopping (FH) are the two kinds of most widely used spread spectrum technologies.
在扩频通信技术中，直接序列扩频和跳频是应用最广的两种扩频技术。
In the spread spectrum communication, direct sequence spread spectrum (DSSS) and frequency hopping (FH) are the two kinds of most widely used spread spectrum technologies.
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