论文部分内容阅读
异步光码分多址通信系统，要求用户地址码具有好的循环自相关和互相关特性，因此，系统中的用户数受到很大的限制；而对同步光码分多址通信系统，只要求光地址码是非循环相关意义下的准正交，从而可实现较大的用户数，因此具有广阔的应用前景．实现同步光码分多址的关键之一是同步光码的设计和可调光编／解码器的实现．本文介绍了同步光码的构造方法，给出了同步光码的构造过程，分析了码的容量，提出了全光可调同步光码编／解码器的实现方法．
Asynchronous optical code division multiple access communication system, requiring users to have good cyclic address autocorrelation and cross-correlation characteristics, therefore, the number of users in the system is greatly restricted; and for synchronous optical code division multiple access communication system, The optical address code is quasi-orthogonal in the meaning of non-cyclic correlation, so that a large number of users can be realized, thus having broad application prospect. One of the keys to achieving synchronous optical code division multiple access is the design of a synchronous optical code and the implementation of a dimmable encoder / decoder. This paper introduces the construction method of synchronous optical code, gives the construction process of synchronous optical code, analyzes the capacity of the code and puts forward the realization method of all-optical adjustable synchronous optical code encoder / decoder.