Design And Implementation Of 800MHz CDMA Dual Channel Booster

Dual Channel Booster can enlarge the coverage range of both uplink and downlink signals simultaneously, and it is a new kind of network optimization equipment for solving the problem of margin area coverage of mobile communication system. It must be an elementary configuration of 3G network.With the purpose of practical application of 800MHz CDMA dual channel booster, this thesis expounds the structure of the booster and its effect in wireless network optimization. Also, we focus on the design of low noise amplifier based on E-PEMT in the forepart of the receiver and the design of real-time informationsampling and control system. According to the demand of noise, linearity and impedance matching in the design process, it is used the radio-frequency circuit CAD software named Advanced Design System for complete analysis, and we design a reliable low noise amplifier, which has balance structure, adjustable gain, low noise figure and high linearity.It is used the AVR microchip ATmega8 to design the real-time information sampling and control system, and we has completed the hardware design including peripheral configuration and sampling circuit and program design. In order to monitor the system directly and simply, it is used Microsoft Visual Basic tools to design a visual control interface communicating with microchip system through RS-232 port, and it implements three functions including parameter setup, real-time information display and alarm indication.