The Design And FPGA Implementation Of Spread Spectrum/Adaptive Antennas Anti-interference System Of Shortwave Station

Adaptive antenna technology and spread spectrum technology are effective measures for enhancing anti-interference performance of communication systems.The purpose of this project is to make the shortwave communication systems possess anti-interference performance and ensure normal communination in bad electromagnetism environment through combining adaptive antenna technology with spread spectrum technology.In this thesis, the main research work focuses on the following aspects:. To investigate the PN synchronization in bad electromagnetism environment,and provide the rules of selecting main parameters in the project;. To analyze the principle of reference signal generation, and present design scheme adapt to the project;. To provide the method of selecting PN1 ,which is regarded as spread spectrum Pseudo-Noise ,and PN2, which is regarded as pilot signal;. To propose detailed realization method for of the PN synchronization and reference signal generation based on FPGA in the project.