Research And Implement Of High-speed Ss Receiver Based On FPGA

Spread spectrum communication technology has the advantages of anti-noise, Anti-jamming, hidden information transfer, multiple access communications, etc. Whethermilitary or civilian fields have a wide range of applications. In spread-spectrum commu-nication technology, the most common are direct sequence spread spectrum communi-cation technology (DS-SS), at present mainly concentrates to the direct sequence spreadspectrum communications system's research in the theoretical simulation, all-digital im-plementation, and the CDMA system capacity improvement. The implementation of ex-isting all-digital spread spectrum receiver system is combin FPGA and DSP , they aremainly used for low-speed data transmission, high-speed data transmission systems areseldom done.This article based on the direct sequence spread spectrum, to the traditional low-speed FPGA sequence spread receiver system structure thorough analysis's foundation,according to the high speed system's design concept, has realized a complete DS-SSreceiver and constructs the simulation system for this receiver to test the platform.The main working of paper is as follows:First, studies the receiver each part of key technologies principle, analyzes each al-gorithm in the actual work ?ow, combined with the practical need to adopt a zero inter-mediate frequency direct sequence spread spectrum receiver.Second, the improved algorithm and system architecture to make digital systemrunning at a higher frequency, the direct sequence spread spectrum receiver system isachieved on the FPGA.Third, using MATLAB, Modelsim and Quartus integrated platform of each moduleand the whole system simulation test, and verify the simulation results of the programfunctions in the actual chip.Finally, for sub-chip multi-path proposed new multi-path amplitude tracking algo-rithm to improve system performance in specific environments.