研究了直接扩频码分多址(DS - CDMA)干扰受限系统的功率分配的可行性问题。
The feasibility criterion of power control in interference-limited direct sequence code division multiple access (DS-CDMA) systems is investigated.
所用的研究方法和有关部分相关捕捉的结论也适用于其它直接扩频快速捕捉系统，如IS- 95。
The research method and the result of partial correlation acquisition detection can also be used in any other fast acquisition system, such as IS-95 system.
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。给出了直接扩频系统的滑动搜索自同步方案。
Contributed to the acquisition and Code tracing for the DS spread spectrum com munication systems, this paper presents the scheme of sliding search self-synchronization for a DS system.
本文阐述了扩频技术的优点、各种扩频系统（直接扩频、跳频和混合系统）的原理和主要参数，以及国际上的规定。
This paper expounds the advantage of spread spectrum, principle and important parameters of the system, and the international regulation.
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.
目前，无人机数据链系统采用的调制模式都比较简单，如2FSK、BPSK、直接扩频技术等，传输速率与抗干扰能力有限。
The modulation types of data link for UAV are simple, such as BPSK, 2FSK , direct spread spectrum. The transmitted rate and anti-interference performance of them are limited.
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。
Direct sequence spread spectrum communications is one of the most typical spread spectrum modes.
当脉冲干扰占空比较小时，干扰能量集中，导致直接序列扩频（DSSS）系统的误码性能较差。
The performance of Direct Sequence Spread Spectrum(DSSS) in severe pulsed noise interference will be badly degraded when the duty factor is small.
主要是数字调制系统、扩展频谱通信原理和直接序列扩频系统等内容。
It mainly contains the digital modulate system, the SS communication theory and the direct sequence spread spectrum (DSSS) system.
为了给验证算法提供现实的BPSK调制的直接序列扩频信号，本文详细介绍了一种多参数可调的扩频信号源的设计方案。
In order to supply the actual BPSK DS-SS signal to verify the algorithms, this dissertation present a design method of spread spectrum signal generator with adjustable muti-parameter in detail.
本文给出了直接序列扩频信号正交分路周期相关检测算法的性能分析。
The performance analysis of quadrature correlation detection algorithm for DS-SS signal is presented.
本文对低信噪比直接序列扩频（DS／SS）信号的检测提出了设计方案和算法。
One detection design block diagram and algorithms for low S/N DS/SS signal are presented in this paper.
提出了直接序列扩频通信系统中抑制窄带干扰的一种算法。
An algorithm for the suppression of narrowband interference in the direct sequence spread-spectrum (DSSS) systems is presented.
主要有两种选择，直接序列扩频和跳频扩频。
There are two main alternatives, Direct Sequence Spread Spectrum and Frequency Hopping Spread Spectrum.
在直接序列扩频通信系统中，假设敌方能够逐个比特地检测到整个PN序列，并产生一个调制的转发干扰。
In direct sequence spread spectrum communication system, enemy is assumed to detect whole PN sequence chip by chip and a modulated retransmitted interference is created.
直接序列扩频技术在军事通信中得到了广泛的应用。
The technology of directs sequence spread spectrum (DSSS) have been applied in the military communication widely.
提出一种减小直接序列扩频(DSSS)接收机信号捕获时间的改进方法。
A better method for direct sequence spread spectrum (DSSS) receiver to decrease the acquisition time is proposed.
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.
直接序列扩频接收机对本地载波的同步要求非常严格，以往所需电路复杂。
A direct sequence spread spectrum (DSSS) receiver has strict requirement on local carrier's synchronization, and always needs complex circuits.
论述了直接序列扩频测距的原理，研究了近距离测距的回波模型。
The principle of direct sequence spread spectrum ranging is introduced and the echo model of near field ranging is discussed.
算法将原始水印利用扩频通信技术生成能够直接嵌入的水印信息；
Original watermark is mapped to watermark information, which can be directly embedded to the host, with spread-spectrum communication technique.
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.
后一种方法是直接根据盗用扩频信号四阶累积量2d切片的特点进行检测，不需要预处理。
In the latter one, we directly detect the embezzled signal according to the fourth-order cumulant 2d slice characteristics, without pretreatment to the received signals.
该文提出一种基于门限估计的直接序列扩频(DS - SS)通信系统窄带干扰变换域抑制方法。
This paper proposes a method for narrowband interference suppression in Direct Sequence Spread System (DS-SS).
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。
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.
基于软件无线电的思想，论述了直接序列扩频接收机的数学模型，进而建立了一个宽带中频采样直扩系统接收机的实现框图。
On the basis of software radio, a mathematics model about DSSS receiver is described, and a realization diagram of wide_scope intermediate frequency sampling DSSS receiver is builded.
CDMA2000采用多载波和直接序列扩频两种方式来达到提供宽带数据业务的目的。
Multi-carrier and direct-spread-spectrum are employed by CDMA2000 to support wideband data service.
干扰抑制是提高直接序列（DS）扩频通信系统抗干扰能力的重要手段。
The anti jamming capability of DS/SS communications systems can be enhanced significantly by interference suppression techniques.
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.
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.
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