Direct sequence spread spectrum communications is one of the most typical spread spectrum modes.
其中直接序列扩频通信是目前使用最典型的扩频工作方式。
This paper introduces the principle of spread spectrum communication, stresses the application of spread spectrum technique, and summarily introduces the broadband access technology of power line .
本文介绍了扩频通信的基本原理，重点论述扩频通信技术在家庭测控网络中的应用，同时介绍了电力线宽带接入技术。
There are two main alternatives, Direct Sequence Spread Spectrum and Frequency Hopping Spread Spectrum.
主要有两种选择，直接序列扩频和跳频扩频。
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.
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。
Based on MATLAB, the primary concepts of the spread spectrum are simulated. The system design and interface technology of a spread spectrum radio device is simply discussed.
基于MATLAB，对扩频通信技术有关概念进行了仿真分析，并简要讨论了点对点扩频电台的系统设计和接口技术。
Presented in this paper is a direct sequence spread spectrum radio based on virtual technique in which direct sequence spread spectrum, software radio and virtual technique are combined.
文中提出的虚拟式直接序列扩频通信电台将直接序列扩频通信、软件无线电和虚拟技术相结合。
Spread spectrum communication is implemented by a spread spectrum chipset, which is composed of two parts:baseband and RF.
扩频通讯由扩频芯片组来实现，该芯片组由基带和射频两部分组成。
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。
The relation between the digital watermarking and spread-spectrum was analyzed at first, A spread-spectrum adaptive digital watermarking scheme based on the wavelet transform was proposed.
在分析了自适应小波变换和扩频特性关系的基础上，提出一种基于小波变换的扩频数字水印算法。
Experimental results show that this scheme can generate much more spread-spectrum sequences than single chaotic map to satisfy the demand of spread-spectrum communication.
计算机仿真结果表明，该模型产生的混沌扩频序列调整更容易，比基于单一混沌映射能产生更多符合扩频通信要求的扩频序列。
In this paper, the theory of spread spectrum communication technology is presented, the structure and the operating principle of spread spectrum communication system are discussed.
本文讨论直接序列扩展频谱通信系统中有关同步捕获和跟踪的问题。
This paper proposes a problem that the error tolerance property of spread spectrum sequence influences the performance of spread spectrum 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。
First of all, the thesis introduces the principles of spread spectrum communication, especially investigates the system structure and features of hybrid spread spectrum communication.
本文首先介绍了扩频通信的基本原理，重点研究了混合扩频的系统结构和特点。
But a spectrum spread system's interference immunity depends on spectrum spread gain.
传统的扩频抗干扰方式在面对窄带干扰时效果良好。
In the spread spectrum communication, direct sequence spread spectrum (DSSS) and frequency hopping (FH) are the two kinds of most widely used spread spectrum technologies.
在扩频通信技术中，直接序列扩频和跳频是应用最广的两种扩频技术。
Capturing spread spectrum sequence is the premise of spread spectrum communication.
扩频码的捕获是扩频通信的前提。
With its spread-spectrum technology to perfect the theory and technology, spread-spectrum technology and mobile communications will be more closely linked.
随着扩频技术自身理论和技术趋于完善，扩频技术与移动通信的联系也将越来越紧密。
According to different ways of spread spectrum, spread spectrum communication systems are divided into: direct sequence spread spectrum, frequency-hopping spread spectrum and hybrid spread spectrum.
根据扩展频谱方式的不同，扩频通信系统分为：直接序列扩频、跳频扩频和混合扩频。
In this dissertation, the author mostly research on Direct Sequence Spread Spectrum (DS-SS), the most ordinary one within Spread Spectrum technologies.
扩频通信技术中，最常见的是直接序列扩频通信(DS - SS)系统，本论文所研究的就是这一类通信系统。
By using 32 bit Cyclic Code Shift Keying(CCSK) code-word S0 to establish spread spectrum space, the tamed spread spectrum was completed.
以32位的循环码移位键控（CCSK）码字S0为基础建立扩频空间，完成软扩频；
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；
Chaotic direct sequence spread spectrum (CD3S) signal is more nonlinear and more complex than the conventional direct sequence spread spectrum signal.
与传统直扩序列相比，混沌扩频序列具有非线性复杂度较高的优点，该优点同时也是盲估计混沌扩频序列的难点。
Chaotic direct sequence spread spectrum (CD3S) signal is more nonlinear and more complex than the conventional direct sequence spread spectrum signal.
与传统直扩序列相比，混沌扩频序列具有非线性复杂度较高的优点，该优点同时也是盲估计混沌扩频序列的难点。
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