一种新形的CDMA蜂房移动通信系统及其容量性能(英文)

On Capacity of A Novel CDMA Cellular System

建立了随机访问多码ＣＤＭＡ（ＲＡＭＣＣＤＭＡ）蜂房移动通信系统模型。ＲＡＭＣＣＤＭＡ采用多个并行码传送一个用户信息以提高信息传送速率，为了不使系统容量下降，文中采用动态调节每个用户的并发码数和子码生成技术。分析表明在动态码数分配及采用子码生成的条件下，该系统容量性能相对于普通ＣＤＭＡ蜂房移动通信系统没有明显下降，而它却能为用户提供高峰值传送速率服务。

In this paper,the architecture of random access multicode CDMA(RAMCCDMA) cellular system is presented.RAMCCDMA adopts multiple parallel codes to transport one user′s information so that high peak date rate services can be admitted into system without extrabandwidth.To keep capacity,it is necessary that the number of parallel codes realtime varies with user′s bit rate and adopts subcode concatenation,which can avoid interference among codes in a user.Capacity performance of RAMCCDMA in multiple cell cellular system is analyzed.It is proved that system capacity is not degraded because of assigning the number of codes dynamically and adopting subcode concatenation.