提出了一种用于直接扩频通信系统（DSSS）快速捕获，新型组合声表子波（SAW）卷积器序列搜索码捕获方案。
A new combined Surface Acoustic Wave (SAW) convolver, or a serial searching code acquisition scheme for direct sequence spreading spectrum (DSSS) communication system is presented.
研究了用于低轨卫星通信的直接序列扩频系统的码捕获技术。
It is studied that the code acquisition technology of direct sequence spread spectrum system in LEO satellite communication.
直扩通信对抗包括直扩信号的盲检测、参数估计和扩频码序列恢复等内容。
The blind detection, parameters estimation and recovery of spreading sequences are the main contents of DS communication counter.
为了增加异步码分多址通信系统的可用码组，研究了在该系统中使用混沌扩频序列的可能性。
In order to expand the group of ades on communication system with asynchronous code division multiaddress (CDMA), the possibility of using chaotic spreading sequences was researched.
直接系列扩频通信系统的频谱扩展是借助于扩频函数而实现的，典型的扩频函数就是伪随机序列码。
Spectra expanding of Spread spectrum communication system makes use of the spread spectrum function to realize, the typical spread spectrum function is pseudo random sequence code.
讨论了高动态、低信噪比、长伪码序列扩频信号的伪码捕获、跟踪、载波跟踪与数据解调方法。
The paper discusses the acquisition and tracking of the PN code and the tracking of the carrier in high dynamic range , low SNR and long PN code.
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.
理论分析表明，该混沌序列具有较理想的A -CD MA扩频码性能。
The theoretical analysis shows that the chaotic sequences serve as spreading codes for A-CDMA.
扩频信号是一个伪随机代码序列，此码片速率比消息数据速率高若干数量级。
The spreading signal is a pseudo-noise code sequence that has a chip rate which is orders of magnitudes grater than the data rate of the message.
分析扩频码的产生和序列特点，给出的编码序列搜索，信息解码的解码方法。
The methods for searching the coded sequences and decoding the information are given.
扩频码序列的设计就是构造不同结构的具有良好特性的伪随机序列来满足CD MA系统的要求。
The design of spread spectrum code sequence is constructing pseudo-random sequence which is possessed of different structure and good performances in order to satisfy the need of CDMA system.
提出了扩频码（序列）容错能力影响扩频系统的性能的问题。
This paper proposes a problem that the error tolerance property of spread spectrum sequence influences the performance of spread spectrum system.
它动态地把信源序列转化成高斯白噪声分布的数据流，再通过量化、平衡编码进行序列优化，以得到所需的扩频码。
It transfers the data source to dynamic Gauss White noise. Then quantizing and optimizing the noise, we can get the final spread sequence.
文中提出了一种基于FPGA的扩频信号快速滑动相关捕获方法，来解决低信噪比条件下长伪码序列的捕获问题。
The paper presents a spread spectrum signal acquisition speed sliding correlation method base on FPGA, to address the problem of capture long PN code under low SNR.
比较了基于利用扩频码序列自相关和互相关特性实现扩频码同步的不同方法。
The ways based on the PN sequence's self-correlation and co-correlation to synchronize are compared.
如果扩频序列采用正交性能好的伪随机码，系统的性能可以优于其他系统；
The dissertation use theories analysis , computer simulation methods with hardware to analyze system performance , data-mapping method and effect of PN code.
如果扩频序列采用正交性能好的伪随机码，系统的性能可以优于其他系统；
The dissertation use theories analysis , computer simulation methods with hardware to analyze system performance , data-mapping method and effect of PN code.
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