According to different ways of spreadspectrum, spreadspectrum communication systems are divided into: direct sequence spreadspectrum, frequency-hoppingspreadspectrum and hybrid spread spectrum.
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。
2
There are two main alternatives, Direct Sequence SpreadSpectrum and FrequencyHoppingSpreadSpectrum.
主要有两种选择，直接序列扩频和跳频扩频。
3
Spreadspectrum has two distinct flavors: direct sequence and frequencyhopping.