扩展频谱是指将信号的频谱扩展至占用很宽的频带,简称扩谱。扩谱技术一般可分为三类:直接序列扩谱(2)跳频3)线性调频,在这种系统中,载频在一个信息码元时间内在一个宽的频段中线性地变化,从而使信号带宽得到扩展。
扩展频谱通信 Spread Spectrum Communication ; Extended Spectrum Telecommunication ; Spread Spectrum
直接序列扩展频谱 direct swquence spread spectrum ; sequence spread spectrum ; Direct Sequence Spread Spectrum
频率跳动扩展频谱 frequency-hopping spread spectrum
扩展频谱频率调制 SSFM
扩展频谱时域反射法 SSTDR
扩展频谱调制技术 spread spectrum modulation technique
扩展频谱调制 spread-spectrum modulation
序列扩展频谱 Direct Sequence Spread Spectrum ; DSSS
跳频扩展频谱 Frequency Hopping Spread Spectrum ; FHSS
扩展频谱定时 Spread Spectrum Clocking
Spread spectrum communication is an accepted technique and has many special advantages.
扩展频谱通信到目前为止已经成为比较成熟的一门技术,在个人通信方面,它具有独特的优点。
参考来源 - 一种基于混沌的扩频通信系统This paper analyses convolution encoding method and spreading spectrum method and discusses emphatically its implementation and demonstrates the program flow chart.
论文分析了卷积编码方法和扩展频谱方法,并详细论述了编码和扩频的软件实现方法,给出了程序的流程图和相关程序。
参考来源 - 激光无线通信系统的DSP实现及仿真研究The theory and application of EDA and FPGA are introduced in this paper,and are described as well the principle theory and current development in spread-spectrum communication technology.
本文首先介绍了电子设计自动化技术,阐述了FPGA的基本原理及其目前在数字信号处理领域的应用,之后概述了扩展频谱通信技术的基本原理和当前的发展情况。
参考来源 - 基于FGPA的基带扩频信号处理器的设计与实现A steganalysis algorithm that estimates the secret key used in sequential steganography of spread spectrum embedding is proposed.
论文提出了一种针对图像扩展频谱序列隐写的密钥估计算法。
参考来源 - 数字图像信息隐写与隐写分析技术研究·2,447,543篇论文数据,部分数据来源于NoteExpress
在研制扩展频谱FH/DS系统时,会遇到一些很困难的问题。
There are several difficult problems in the research of spread spectrum FH/DS system.
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.
伪随机序列的产生是实现BPC低频时码发播台扩展频谱技术升级的一个重要环节。
The generating of pseudo random sequence is one of the key subjects to realize the spread spectrum technique upgrade for BPC low frequency time code radio station.
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