| Cdma2000 is one of the standards for the 3rd Generation (3G) wireless communication systems. In multiple environments,cdma2000 satisfies the requirements of IMT-2000, supporting various/combined services (e.g. voice,packet/circuit data, positioning services) with different QoS. Becoming fiercer in the market competition of mobile communication trade, how to improve satisfaction of customers, improve the impression that the feelings to the network,improve the existing network maintenance level and optimizing quality, its benefit of full play that maximum,has already become the important subject of improving the management level of network maintenance.This thesis has introduced the summary , division of the regional frequency band and wireless theory that spread of CDMA mobile communication system from the basic conception and operation principle of mobile communication.The pilot frequency pollution is the biggest difficult problem in CDMA system which meets in the urban high-level region, is affects the user feelings as well as influence the CDMA system network target. This article characteristic is by many kinds of mentalities, in many kinds of way contrasts, seeks reduces and even eliminates the pilot frequency pollution nearby the windows of indoor coverage buildings in CDMA system. Then introduced the method of the solution to pilot frequency pollution in this special work, through the contrast implementation effect, the project difficulty as well as to existing network's influential, counts software's analysis through the backstage, seeks the best solution pilot frequency pollution way—Pseudo pilot frequency way.Around finally unifies the Dongfang Zhongxin building to optimize the network condition contrast as well as the telephone traffic statistics comparison in the Shanghai present network, obtained the false pilot frequency way thorough settlement pilot frequency pollution, enhanced in the building the CDMA network performance index, improved the user;s feelings. |
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