900MHz频段多信道调频无绳电话

The Design and Development of Multi-Channel FM Cordless Telephone in 900 MHz

本文给出一种根据欧洲ＣＥＰＴＣＴ１＋的标准设计和研制的９００ＭＨｚ频段８０信道调频无绳电话，介绍了ＣＴ１＋标准的主要要求，给出其硬件和软件设计的关键技术，重点研究了物理层的设计，提出“循环检测法”和利用信道“忙闲表”法，使信道扫描时间和主动建链时间均达到最短，最后给出研制情况和测试结果．该无绳电话已研制成功并取得欧洲国家的生产许可证．

A new type of cordless telephone in 900 MHz band is designed and developed according to CEPT CT1+standard.This standard is reviewed briefly. Some key methods in design of the hard-ware and software are proposed,The design of the physical layer in softare is studied in detail.In or-der to shorten the scanning and link time,the methods of the cycle compansion to check valid ID andthe using busy-free-table to find a free-channel are presented. The results prove that the design meth-ods in this paper are right and useful.