连续频谱 meaning in English
continuous frequency spectrum
continuous spectrum
Examples
- Non - periodical time function consists of time harmonics with continuous frequency spectrum
非周期时变由连续频谱之弦波所构成。 - But they have the disadvantages such as poor complexity , poor security and insufficient amount of sequence numbers among the family of codes , the chaotic signals have noise ? ike , broadband frequency spectrum , they can be used as spreading codes , furthermore , chaos system is extremely sensitive on initial conditions so that the various initial conditions given by chaos system can provide with large sum of spreading sequences and this can meet the demand of cdma , this thesis sets out to study on using chaos system to generate spreading sequence s , there are two parts is this paper : firstly , we study the basic theory of spread ? pectrum communication and the characteristics of chaos so as to prove the applicability of chaos system to be used in spread ? pectrum ii communication system
现在使用的扩频码有m序列， gold码和r - s码等，这些扩频码具有良好的随机性，但普遍存在着复杂度低、保密性差以及同一码族序列数目少等缺点。混沌信号具有类似噪声、宽带连续频谱的特征，正符合扩频通信中对扩频码的要求，而且混沌系统对初始值极其敏感，可以通过给混沌系统赋予不同的初始值得到为数众多、不相关的扩频序列，这正好满足码分多址的要求。本文对利用混沌系统应用于扩频通信作了一些研究工作，主要包括两部分：第一部分：探讨了扩频通信的基本理论和混沌的基本特性，说明将混沌系统应用于扩频通信系统的可行性。