Proposes a new lossy robust spread spectrum watermark algorithm.
提出了一种新的无失真鲁棒扩频水印方法。
Spread spectrum has two distinct flavors: direct sequence and frequency hopping.
该技术有两个明显的变型：直接顺序与跳频。
There are several difficult problems in the research of spread spectrum FH/DS system.
在研制扩展频谱FH/DS系统时，会遇到一些很困难的问题。
The near field spread spectrum ranging algorithm based on software radio is investigated.
对基于软件无线电的近距离扩频测距算法进行了研究。
First, the basic principles of power line communication and spread spectrum are introduced.
论文首先介绍了电力线载波通信和扩频技术的基本原理。
An adaptive acquisition strategy for slow frequency hopping spread spectrum system is proposed.
提出了一种应用于跳频扩频系统的自适应捕获策略。
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。
Methods and systems for time synchronizing a receiver to a spread spectrum signal are described.
本发明描述了接收机与扩频信号进行时间同步的方法和系统。
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。
In this paper, a spread spectrum digital watermark based on Gaussian pyramid decomposition was proposed.
提出了一种基于高斯金字塔分解的数字图像扩频水印技术。
Spread spectrum communication is the most efficient mode in the strong noise environment such as the coal mine.
扩频通信是矿井等强噪声环境中最有效的通信方式。
Spreading sequences design is one of the key task in the direct-sequence spread spectrum communication systems.
扩频序列设计是直接序列扩频通信系统的关键课题之一。
Merits of the Linear FM are that it is not necessary to have an equalizer or the spread spectrum code modulation.
线性调频调制的优点是：不须在接收端添加均衡滤波器，也不须进行扩频编码。
A better method for direct sequence spread spectrum (DSSS) receiver to decrease the acquisition time is proposed.
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。
The technology of directs sequence spread spectrum (DSSS) have been applied in the military communication widely.
直接序列扩频技术在军事通信中得到了广泛的应用。
The applications of SAWTDL in the TDMA spread spectrum mobile communication system is mainly introduced in this paper.
文中主要介绍声表面波抽头延迟线(SAWTDL)在TD MA扩频移动通信系统中的应用。
This article has described one method of transmitting physiological data through wireless spread spectrum communication.
本文描述了一种通过扩频通讯的方式实现生理数据无线传输的方法。
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。
The ownership prover insert the watermark into the host signal using symmetric watermark technology based on spread spectrum.
所有权证明者采用基于扩频的对称水印技术，在宿主信号中嵌入水印；
Through the analysis of the spread spectrum and power line carrier spectrum, the authors design a set of remote reading system.
通过对扩频通信和电力线载波通信特点的分析，设计实现了一套远程抄表系统。
It mainly contains the digital modulate system, the SS communication theory and the direct sequence spread spectrum (DSSS) 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。
The methods of acquisition and tracking of spread spectrum(SS) signals, hardware design and software flow, are discussed in detail.
文中较详细地讨论了扩频信号的捕获跟踪方法、硬件设计及软件流程。
Reverse-spread spectrum device, time sequence inspection device, channel evaluation device and method for measuring frequency faults.
逆扩频装置，时序检测装置，信道估计装置和频率误差测量方法。
An intelligent lighting system for railway goods yard based on spread spectrum power line carrier communication technique is proposed.
用扩频电力线载波通信技术设计了铁路站场智能化照明系统。
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。
This paper expounds the advantage of spread spectrum, principle and important parameters of the system, and the international regulation.
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。
The spread spectrum fingerprints embedding is researched based on tree-structure at multicast following Gaussian with bandwidth requirement.
在多播环境下，考虑带宽影响研究了一种基于树结构的扩频指纹嵌入系统。
A new modulated lapped biorthogonal transform (MLBT) was introduced for narrowband interference suppression in spread spectrum communications.
引入一种新的调制重叠双正交变换(MLBT)用于扩频通信窄带干扰抑制。
Traditional blind additive ss (spread spectrum) watermarking systems have such features: high robustness, low detection value and small capacity.
传统盲加性扩频水印系统具有鲁棒性高、检测值低、容量小的特点。
The performance of Direct Sequence Spread Spectrum(DSSS) in severe pulsed noise interference will be badly degraded when the duty factor is small.
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。
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