The main reason why the SS communication can pick up weak signal in the strong noise environment, is the function of spreading and despreading spectrum.
扩频通信之所以能实现强噪声环境中弱信号的提取，主要是扩频和解扩的作用。
Direct sequence spread spectrum (DSSS) and despreading first structure is most advantageous of all kinds of spread spectrum techniques.
扩频系统中性能最好的是直接序列扩频的先解扩后解调方式。
In this paper, a blind despreading algorithm is proposed for the synchronous multi-user long-code Direct Sequence spread Spectrum (DS-SS) signals in low signal to Noise Ratio (SNR) scenarios.
针对同步多用户长码直扩信号，该文提出了一种低信噪比条件下的盲解扩算法。
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