摘要
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．
Because asynchronous optical code division multiple access communication system requires that the subscriber address codes must have good cyclic auto correlation and cross correlation properties, the number of subscribers in the system is considerably limited.However, since synchronous optical code division multiple access communication system only requires quasi orthogonal optical address codes under none cycle correlation, the communications among a large number of subscribers can be realized. Therefore synchronous optical code division multiple access techniques should be used more widely in the future. The key for realizing synchronous optical code division multiple access is the design of synchronous optical codes and the realization of all optical tunable encoder/decoder. In this paper, the construction of synchronous optical code is presented.The design procedures of synchronous optical codes are given.The cardinality of synchronous optical codes is analyzed. The realization method of synchronous optical code encoder/decoder is proposed for the first time.
出处
《光子学报》
EI
CAS
CSCD
1999年第7期607-612,共6页
Acta Photonica Sinica
关键词
同步光码
分多址通信系统
码编/解码器
synchronous optical code division multiple access communication system
Synchronous optical code
Synchronous optical code encoder/decoder
