论文部分内容阅读
本文简介了IMT-2000的标准化进程,并围绕第三代CDMA空中无线接口,比较了W-CDMA与cdma2000的主要参数,综述了异步基站操作、变长正交码字、多速与变速传输、越区越频切换、快速功率控制、差错控制编码与矢量均衡等关键技术,展望了第四代空中无线接口可能提供的服务及其传输技术。
In this paper, the standardization process of IMT-2000 is introduced. The main parameters of W-CDMA and cdma2000 are compared around the third generation of CDMA air wireless interface. In this paper, the operation of asynchronous base station, variable length orthogonal code, multi-speed and variable speed transmission, The key technologies such as frequency-hopping handover, fast power control, error control coding and vector equalization are discussed. The services provided by the fourth-generation air-to-air interface and their transmission technologies are also expected.