针对直接序列扩频信号，介绍了其发射和接收部分基本组成，给出了系统接收部分的具体设计框图。
The paper introduces the basic composition of transmitter and receiver in direct-sequence spread spectrum system and gives the detailed design block diagram of the receiver.
针对直接序列扩频通信中的载波恢复问题，提出了一种基于自适应算法设计的双pll载波跟踪方法。
For the problem of carrier recovery in DS-SS communication, the model of dual PLL is presented, which is designed based on the auto -adapted algorithm.
针对直接序列扩频信号工作中信噪比较低的特点，提出了一种通过求解接收信号相关矩阵的特征值来估计信号信噪比的方法。
In consideration of the low signal-noise-ratio (SNR) of DSSS signals, a method of estimating the SNR was given by resolving the eigenvalue of the received signal correlation matrix.
文章介绍了直接序列扩频通信的原理及其优点，针对不同的干扰方式，对直接序列扩频通信的抗干扰能力进行分析。
The paper introduces the principle and the merit of DSSS communication, then analyze the anti-jamming capability of DSSS communication in the case of many kinds of jam.
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。
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。
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.
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