Study On The Design Of CDMA2000 1xEV-DO Wireless Channel

CDMA2000 1x EV-DO is an effective improvement for CDMA2000 1x wireless network in providing data service. By the study on the disign of EV-DO channel, it is helpful for network technicians to learn more about the EV-DO equipments. Therefore, those equipments can provide better data services and improve the quality of network overlay.In the thesis, the study on the disign of EV-DO channel is divided into three parts. The first part introduces the physical layer and air interface of EV-DO, including the forword channel structure, the reverse channel structure and the computing method on performance of wireless channel. In the second part, the theories of rate allocation and power distribution are concluded. And it pays more attention on the rate allocation algorithms and power distribution algorithms. The principle of rate allocation and power distribution is introduced in this part, including the control flow part, algorithms and the analysis on their influence of system overlay performance. In the third part, a practical EV-DO project is introduced. This project is carried on by the China United Telecommunications Corporation Xinchang Branch. In this part, the budgets of both forword channel and reverse channel are discussed. Moreover, by analysing the measure results, the reasons on the different overlay of forword channel and reverse channel are discussed. And the corresponding solutions are given.