一、引言近年来,无绳电话发展迅速,尤其是无绳电话已作为实现个人通信网(PCN)的途径之一。无绳电话经历了从固定单信道到多信道自动扫描、从低频段到高频段和从模拟到数字的发展过程。欧洲的DECT和美国PACS越来越被广泛接受,它们都积极生产出相应的系统设备和移动手机,抢占巨大 I. INTRODUCTION In recent years, cordless telephones have been rapidly developed. In particular, cordless telephones have emerged as one of the ways to implement Personal Communication Networks (PCNs). Cordless phones have gone from fixed single-channel to multi-channel automatic scanning, from the low band to the high band and from analog to digital development. DECT in Europe and the United States PACS more widely accepted, they are actively producing the appropriate system equipment and mobile phones, to seize a huge