Based On The Wireless Receiver Baseband Processing Design Of Spread Spectrum Communication

In this dissertation, a research has been made a fusion system of spread spectrum technology, sensor technology, and monitoring system. Spread spectrum communication applications in the prison monitoring system is to enhance the prison management capabilities, is an effective means to improve the development of the traditional prison management mode. This system monitors part of the focus of the inmates or prison outside activities of staff, detecting the value of the parameters tested, real-time monitoring of target movements.This system is designed to be portable, low-power chip.Spread-spectrum communication is the ability to enhance the signal reception, the ability of anti-crack.It examines the principle of spread spectrum communication transceiver.It using Altium Designer design circuit schematics, loading network table, layouting diagram of the PCB and debuging chip port. It uses the Verilog language designing program, including the system clock, occurred balance Gold code, tracing module. The Modelsim simulation function of each module and testing the downloaded program.In interference or a higher error rate, conventional receiver can demodulated data.The system is designed to handle511baseband spread spectrum signal, real-time tracking and capturing the256-channels input data, the shortest time tracking demodulate the data. It sets the threshold value and selects the maximum two value method to determine whether the tracking success. In the case the the higher error rate, the experiment proved the this system can be normally demodulated data. The results meet the design requirements and objectives.