Network channel is base on frequency hopping and spectrum spread radio stations.
网络信道基于跳频和扩频超短波电台。
But a spectrum spread system's interference immunity depends on spectrum spread gain.
传统的扩频抗干扰方式在面对窄带干扰时效果良好。
The design of code tracking loop is a key sector of the realization of noncoherent spectrum spread receiver.
伪码跟踪环的设计是实现非相干扩频接收机的关键环节。
Aiming at the spectrum spread problem of traditional digital modulation signals, a time-phase modulation (TPM) method with abrupt phase change characteristic is proposed.
针对传统数字调制信号频谱扩展问题，提出具有相位突变特性的时相调制(TPM)方式。
Therefore, spectrum spread systems lose efficiency when dealing with wide band interference.
因此，扩频系统在面对宽带非平稳干扰时，抑制效果十分有限。
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.
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.
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。
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