Research On Resolve High-level Pilot Pollution Based On Secondary Amplification Technology

In the mobile communication network, CDMA network standard has a trait of high spectrum efficiency, because apply the code division multiple access technology makes the network can complete point of single frequency network, so its frequency spectrum utilization is "1", combined with its unique way of soft handoff, able to complete mobile business service between the base station signal with same frequency point, so far the high request between base station signal control, if the signal control is not ideal, is likely to produce the phenomenon such as pilot pollution, noise, make the network access ability is affected. Analysis the factor for pilot pollution, due to the base station can be found using PN reuse technology to distinguish between different sectors in the grid, Therefore The phenomenon of signal planning and far as cover leaks and so on are obvious in urban areas, in the city of high-rise buildings, the terminal can receive signals from multiple base stations at the same time, due to the signal strength and interfere with each other, leads to the same frequency interference is quite serious, affect the quality of communication. Top pilot frequency interference is a common phenomenon in the CDMA network, is an important aspect to affect customer perception. With the rising number of CDMA network user, network load has increased, top pilot frequency interference effects have been increased.This paper is focused on the control and improvement of high-level interference sources of interference in the room. The main study of the following questions Pilot frequency interference problem representation; Mechanism analysis of high-level pilot frequency interference problem; Analysis on the basis of the principle of secondary amplification equipment solutions; Case analysis based on secondary amplifying device.Our proposed solution which is to use a secondary signal amplification by describing the radio signal propagation characteristics, calculating the loss, analyzing the causes and mechanism of high-level pilot pollution phenomenon. By using the new amplifying device in the case of not penetrate the wall, we amplified station signal especially the window area, the formation of multi-channel outdoor clutter suppression effect frequency, so that became the source of the corridor room to be dominant frequency coverage area, and can be verified by engineering examples and effectiveness of the implementation of such ideas and methods. CDMA network for 2G and 3G coverage optimization senior interior work a certain significance.