It mainly contains the digital modulate system, the SS communication theory and the direct sequence spread spectrum (DSSS) system.

主要是数字调制系统、扩展频谱通信原理和直接序列扩频系统等内容。

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The performance of Direct Sequence Spread Spectrum(DSSS) in severe pulsed noise interference will be badly degraded when the duty factor is small.

当脉冲干扰占空比较小时，干扰能量集中，导致直接序列扩频（DSSS）系统的误码性能较差。

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A better method for direct sequence spread spectrum (DSSS) receiver to decrease the acquisition time is proposed.

提出一种减小直接序列扩频(DSSS)接收机信号捕获时间的改进方法。

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Main.net uses a related technology called direct sequence spread spectrum, or DSSS, to send its signals down the power line.

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