soft handover meaning in Chinese

软件切换

This paper firstly introduce the background and signification of this research , tdd - cdma communication principle including its technology advantage , then research the critical technology of its physical layer such as power - control technology , soft handover , multiuser detection , diversity technology and rake receiver , software radio and smart antenna and so on
第一章，简明扼要地介绍了研究背景和意义以及本论文所做的工作。第二章，概述了tddcdma的通信原理，包括cdma扩频通信原理、 tdd的工作原理、 tddcdma的技术优势及存在的问题。