| Because of the unique natural environment and resources, various operation activity frequently occurred on the sea of Huludao, such as island catch, coastal waters cultivate, travel development of resources, garrison, shipping and mineral products develop. It puts forward demand for higher communication quality to maritime mobile communication. Doing well the sea coverage is an important business opportunity of Huludao CDMA market development.At first, this paper introduces and studies the basic communication theory of CDMA network coverage from CDMA communication principle, characteristic of sea coverage, antenna covering principle, and so on.Secondly the Huludao sea area several centralized problems are analyzed and summarized by making full use of network optimize software of testing, analyze software and way examine. The problems include pilot frequency pollution, cover overlap too large, weak to cover and cross district cover.A design scheme is recommended to improve the quality of network coverage in Huludao sea area based on theory learning and the practical problems testing and analysis. Optimization scheme starts with coverage adjustment, parameter adjustment and resource adjustment. Optimization scheme practices through the adjustment of direction angle, declination angle, adjacent area, power control parameters and access handoff parameters. The achievements of optimization technology are proved through the before and after comparison of forward signal-to-noise ratio, frame error ratio, forward transmit power and reverse transmit power.Finally, a new planning and design is proposed based on present sea coverage to improve the quality of network coverage in Huludao sea area.CDMA network coverage has reached or approached effect of land mobile network after the project implementation.It makes a great significance to improve the quality of whole network coverage and support front of market. |
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