Power spectrum analysis of interference to a Beidou satellite receiver from UWB impulse radio sysems

The interference to a receiver of a second generation Beidou satellite system from ultra-wide band (UWB) impulse radio (IR) systems is analyzed. Both the power spectral density (PSD) of the Beidou satellite signal and the PSD of typical UWB-IR signals, such as UWB radar and pulse amplitude modulation (PAM) data signals, are given. The radio frequency (RF) front-end of the Beidou receiver is considered to suppress the effects of UWB-IR interference. Performance results are presented which show that UWB-IR systems which comply with the regulations of the Federal Communications Commission (FCC) and the Ministry of Industry and Information Technology (MIIT) of China can have different effects on a Beidou signal. Further, it is shown that the RF front-end processing of the satellite system provides no significant suppression of this interference.