The results show that:the direct sequence spread spectrum signals, frequency hopping signals and DS/FH hybrid spread spectrum signals are correct;

实验结果表明：产生的直扩信号、跳频信号和DS／FH混合扩频信号正确；

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In order to solve the problem of direct sequence spread spectrum signals check and recognition, a blind estimate algorithm is proposed, it based on cyclic spectrum theory and matrix transform.

为了解决正确检测和识别直扩信号的问题，提出一种基于循环谱理论和矩阵变换法的盲估计算法。

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Aiming at the acquisition problem of direct sequence spread-spectrum (DSSS) signals with large Doppler offset, a new method based on fast Fourier transform (FFT) is proposed.

针对具有大多普勒偏移的直接序列扩频信号捕获问题，提出一种基于快速傅里叶变换(FFT)的多普勒和伪码分别并行搜索的捕获新方法。

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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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