主要有两种选择，直接序列扩频和跳频扩频。
There are two main alternatives, Direct Sequence Spread Spectrum and Frequency Hopping Spread Spectrum.
提出了一种应用于跳频扩频系统的自适应捕获策略。
An adaptive acquisition strategy for slow frequency hopping spread spectrum system is proposed.
根据扩展频谱方式的不同，扩频通信系统分为：直接序列扩频、跳频扩频和混合扩频。
According to different ways of spread spectrum, spread spectrum communication systems are divided into: direct sequence spread spectrum, frequency-hopping spread spectrum and hybrid spread spectrum.
他还带领一个工程师团队，负责研究用于跳频扩频以及卫星系统的频率合成器和局部发生器。
He headed a group of engineers, whose duty was to develop frequency synthesizers and local generators for frequency hopping spread spectrum and satellite systems.
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.
直接序列扩频通过扩展干扰频谱降低有效干扰功率进行抗干扰，跳频则主要是通过频点跳变的方式躲避干扰。
DSSS system combats the jamming by reducing the effective power of jamming, and FH system does through the frequency hopping to avoid jamming.
网络信道基于跳频和扩频超短波电台。
Network channel is base on frequency hopping and spectrum spread radio stations.
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.
跳频通信是扩频通信的一个分支，它的突出优点是抗干扰性强，因而很适用于军事领域。
Over the past few decades, frequency-hopping (FH) communication system is widely used in military applications for its well performance.
跳频通信是扩频通信的一个分支，它的突出优点是抗干扰性强，因而很适用于军事领域。
Over the past few decades, frequency-hopping (FH) communication system is widely used in military applications for its well performance.
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