Research And Applications Of Coastal Covering Technology Based On CDMA Wireless Network

With the continuous development and improvement of the mobile communication network,mobile network service area has been expanded to offshore areas even outside the line of sight.But the capacity and speed of the current network can not meet the needs of user’s voice and dataservices. In order to meet the network needs of users in the offshore areas and waterways, thereis an urgent need for a greater capacity, faster, better user’s experience CDMA network instead ofthe original network.This thesis is based on the characteristics and difficulties of the marine environment,focusing on the analysis of the impact of the marine environment on the CDMA networkcoverage. It puts forward planning and optimization of technical solutions of the marine networkcoverage based on CDMA network. Firstly, this thesis analyzes the segmentation propagationmodels for the sub-sea areas, and establishes the basic mathematical model. It carries out adetailed analysis of the calculation of the wireless line-of-sight path, and then comes to amathematical model of the antenna hanging high and wireless line-of-sight. Secondly, for thedeficiencies and shortcomings of the current network coverage, this thesis describes the watersCDMA coverage planning program. And it elaborates the planning process, including theregional division of the waters, the link budget, capacity planning, planning of the station siteand the selection of the main equipment. Finally, the thesis takes a coastal city in Jiangsu as anexample, to make a marine network coverage planning and optimization based on the CDMAsystem. Compared with the performance of the original network, the coverage effect of theCDMA network performs better.After engineering practice tests, to make a marine network coverage planning andoptimization based on the CDMA system, the coverage effect of the network performs muchbetter than the original network.