Network channel is base on frequency hopping and spectrum spread radio stations.
网络信道基于跳频和扩频超短波电台。
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。
Therefore, spectrum spread systems lose efficiency when dealing with wide band interference.
因此，扩频系统在面对宽带非平稳干扰时，抑制效果十分有限。
The design of code tracking loop is a key sector of the realization of noncoherent spectrum spread receiver.
伪码跟踪环的设计是实现非相干扩频接收机的关键环节。
Aiming at the spectrum spread problem of traditional digital modulation signals, a time-phase modulation (TPM) method with abrupt phase change characteristic is proposed.
针对传统数字调制信号频谱扩展问题，提出具有相位突变特性的时相调制(TPM)方式。
The wireless propagation environment is described first: analyzing the small-scaled fading, including amplitude fading, multi-path time delay and Doppler spectrum spread.
在本论文中，首先对移动传播环境作了描述，特别是对小尺度多径传播造成的幅度衰落，多径时延和多普勒频移进行了分析；
These efforts contribute to our understanding of the virus, its patterns of spread, and the spectrum of sickness it can cause.
这些努力有助于我们理解这一病毒，其传播模式，以及它可能导致的疾病范围。
We are getting new data daily, and we are beginning to get an early picture of the clinical spectrum and patterns of spread.
我们每天都得到新的数据，我们也开始初步了解临床情况和传播模式。
Because the outgoing signal is known, it is as easy to process as spread-spectrum signals.
正因为输出信号是已知的，所以它能更轻松地处理这样多频率的信号。
Also, a spread-spectrum attachment was to be made available for beaming data across town or across the country. The target price was $6000.
除此之外还有一种扩频通信附件可以跨越市区或乡村进行通讯，售价6000美元。
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。
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。
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。
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.
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。
The spread spectrum communication with an aperiodic PN code and under strong man-made jammers has an important significance in military communications.
强人为干扰环境下的非周期扩频码的扩频通信在军事上具有重要的意义。
Among the use of various technologies in WLL, the use of spread spectrum is increasing due to its high data rate, no license in certain condition, etc.
在无线本地环路的各种技术手段中，扩频技术以其高数据速率和在一定条件下无需频率许可证等优点，在数据传输中得到越来越广泛的应用。
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。
The paper finally gives an example of spread spectrum technology in data transfer in Shanghai.
最后举例说明扩频技术在数据传输中的应用。
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。
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。
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。
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。
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。
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。
Spread - spectrum technique has been widely used in the burgeoning individual wireless communication.
扩频技术在新兴的个人无线通信中得到了广泛的应用。
The algorithm is applicable to precise measuring of the PN code phase of satellite positioning signals and spread-spectrum ranging signals.
该算法的主要应用领域为卫星定位信号和直序扩频测距信号PN码相位的精确测量。
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。
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。
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。
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