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- 设pn序列长度为Lc,为输入信号的Lc倍,输入带宽为f,则经过扩频后,信道中传输信号的带宽为Lc*f,.躁声也衰减为原来的1/Lc。在解调端用相同的pn序列进行解调。这样的好处是频带扩宽了,有利于对传送信号的保密,只有知道调制端的pn序列,才能正确地解调出信号;另外,由于躁声的衰减,在很大程度上降低了误码率-Based pn sequence length Lc, for the input signal Lc times, input
DDs
- 这是我的毕业设计,是用VHDL编程的直接扩频发生器。-This is my graduation project is the use of VHDL programming direct spread-spectrum generator.
ton
- 这是有关扩频通信系统仿真研究,介绍了在水下部分的特殊环境的通信实现。虽然比较冷门,不过物以稀为贵!-This is the spread spectrum communication system simulation studies, described in the underwater part of the special environment of communication. Although unpopular, but
cdma
- CDMA系统中的扩频序列相关性研究 扩频技术 -Spread Spectrum CDMA System sequence spread spectrum technology-related research
11
- 完成跳频通信系统的仿真,扩频和解扩,很详细-Complete frequency-hopping communication system simulation, spread spectrum reconciliation expansion, in great detail
DDSS_Matlab
- 直接序列扩频Matlab程序 直接序列扩频通信可以有效地抵抗来自信道中的窄带干扰。在一个直扩通信系统中,扩频是通过伪噪声序列(PN)对发送的信息数据进行调制来实现的。在接收端,原伪噪声序列和所收信号的相关运算可将窄带干扰扩展到DS信号的整个频带,使干扰等效为幅度较低频谱较平坦的噪声;同时,将DS信号解扩,恢复原始信息数据。-Matlab procedures for direct sequence spread spectrum
cox
- COX提出DCT域扩频水印嵌入算法。 这个算法是一个非盲水印,可以在此基础上改进得到盲水印算法-COX proposed DCT-domain spread spectrum watermark embedding algorithm. The algorithm is a non-blind watermarking, you can improve on this basis to be Blind Watermarking A
dssMatlab
- 直接序列扩频通信小程序,希望对大家有所帮助,欢迎下载-Direct sequence spread spectrum communications applet, and they hope to help everyone, welcome to download
GPSkuopinmatongbu
- 详细介绍了GPS原理,采用matlab对GPS扩频码进行捕获仿真-Detailed information on GPS theory, the use of matlab to capture GPS spread spectrum code simulation
kuopintongxinxitongweimabuhuojishuyanjiu
- 本论文围绕伪随机码的捕获展开,主要研究了直接扩频通信系统的性能特点、 伪随机码的产生与相关性、重点是伪随机码的捕获,提出了一种新型的捕获方法 ——双向滑动捕获法,并针对双向滑动捕获法进行了一些理论分析和探讨。-In this paper, around the pseudo-random code capture started, mainly to study the direct spread spectrum commun
222
- 扩展频谱技术有多种基本实现方式,本文主要介绍的是直接序列 扩频技术,特别针对二进制的PSK 调制解调技术,直接序列扩频系统的抗干 扰能力分析与直接序列扩频系统的同步方法,并进行了相关仿真分析-Spread spectrum technology has a wide range of basic ways, the introduction of this paper is a direct sequence spread sp
pnt
- 应用于扩频通信,关于PN码扩频,在matlab中的完整程序代码。-Applied to spread spectrum communication, spread spectrum on the PN code in matlab full program code.
m_xulie
- 扩频通信中码率为18K的15位m序列的matlab生成程序,自己写的,马马虎虎哈-Spread Spectrum Communication 18K bit rate for the 15 m sequence of matlab to generate procedures, wrote it myself, so-so ha
dsss3
- 介绍了直接序列扩频通信的理论基础和模型,并通过MATLAB提供的Simulink仿真平台对直扩通信系统进行了仿真。
MATLAB_dssf
- 扩频接收机程序,用于清晰化了解接收机在扩频通信系统中的作用-Spread spectrum receiver procedure for a clear understanding of receivers spread spectrum communication system in the role of
communication
- 本文件包含通信所有过程,从调制,扩频,发送到接收,经过解扩,解调等。其中信道可以随机产生时变的多径信道。
simulate
- 扩频程序,用于扩频通信中噪声对系统影响大小的研究-Spread-spectrum procedures, for spread spectrum communication system in the impact of noise on the size of the study
buhuo
- 扩频通信中的捕获问题,用GOLD码进行扩频, PN码相位捕获,利用捕获的相位,接收机产生偏移的GOLD码,进行解扩和误码率计算-Spread Spectrum Communication capture problems, and use spread-spectrum GOLD code, PN code phase acquisition, the use of capture phase, receivers have offse
rake
- 实现CDMA系统的RAKE接收,比较最大比合并、等增益合并、、选择合并接收算法的性能,采用3条多径,每条多径之间延迟半个码片,信源输入采用16位WALSH码扩频-Realize RAKE receiver CDMA system to compare maximal-ratio combining, and so gain the merger, and select to receive the combined algorithm,
12-6
- 比较对大比合并、等增益合并、选择合并接收算法的性能,信源输出用16位Walsh码扩频-Compared to the majority merger, the combined gain and so on, select receiver algorithm combined the performance of source output with 16-bit Walsh code spread-spectrum