Signal Detection And Implementation Of Meteor Burst Communication In Extremely Low SNR Mode

Based on the analysis of the meteor burst channel specialty in extremely low SNR communication mode, using the principle of M-ary orthogonal spread spectrum, the key technology of weak signal detections in meteor burst communication is discussing. Computer simulations are show the proposed technologies are effective. Finally, the hardware implement schemes are realized.In section I, the meteor extremely low SNR communication necessity and feasibility is investigated and analyzing the meteor burst channel specialty in extremely low SNR communication mode is analyzing. In section II, M-ary orthogonal spread spectrum is proposed and discussed to anti severe noise and interference. In section III, with the principle of iterative signal processing, the iterative carrier synchronization and compensation method is proposed. By compensating the long spread spectrum code with the residual frequency offset, the correlation peak can be increased, and the corresponding performance of receiver can be improved significantly. Theory analysis is included to prove the proposed method is effective. In section IV, the meteor extremely low SNR simulation platform is set up and simulated in SPW (Signal Processing Workspace). The simulation results show that the iterative carrier synchronization and compensation method is effective. In section V, the hardware platform is briefly introduced.