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.

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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.

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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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