Impact of interference on the frequency domain and modulation domain of BDS signal

BeiDou navigation Satellite system (BDS) is highly susceptible to interference from air or ground, which may cause signal quality changing and navigation performance redacing. Evaluating the impact of interference on BDS navigation signal quality can lay the foundation for interference monitoring technology. Different types of signals as interference are generated by vector signal source. and superimposed on BDS navigation signal received by high-gain antenna, the aliased data is processed offline, and the signal quality is analyzed from frequency domain and the modulation domain. Results show that interference may deteriorate BDS navigation signal, and the influence of different types of interference on the signal quality is different. Power spectrum and constellation processing results can be used to analyze the quality of BDS signal in interference environment.