Design And Implementation Of BDS/GPS Dual-Mode Receiver Interference Suppression Algorithm On Hardware Platform

The Satellite navigation system is an important national time-space information infrastructure.China attaches great importance to the construction of Satellite navigation systems,and efforts to develop independent Satellite navigation system.At present,China's Beidou navigation system is also out of the global positioning system.Compatible with the mainstream GPS and the BDS dual-mode navigation and reception system is a major trend in the military and civilian.But when faced with intentional or unintentional threat of strong interference,dual-mode navigation receiver system will not work properly.Therefore,it is necessary to study the interference suppression of the jamming signal.Based on the National Natural Science Foundation of China,the main objective of this paper is to suppress the suppression of jamming disturbances for the GPS L1 band and the Beidou B1 frequency band under static conditions.In this paper,the principle of BDS/GPS dual-mode receiving system is introduced briefly.The array model is studied and the simulation of MATLAB is carried out.In view of the shortcomings of the matrix inversion and the slowness of the matrix,the Cholesky decomposition algorithm is used to invert the power The algorithm is improved and the two algorithms are simulated and analyzed.The complete dual-mode anti-jamming receiving system platform is designed and built.Finally,the interference suppression test based on classical power inversion algorithm and improved power inversion algorithm by Cholesky algorithm is carried out.The test results show that the interference suppression receiving system based on classical power inversion algorithm can meet the requirement of interference suppression,and the suppression capability is about 20dB.After the algorithm is improved by Cholesky algorithm,the system interference suppression ability is enhanced by 5dB,which is about 25dB.