Propagation model and communication link equation of the UWB based outer space satellite formation

In this study, the communication link equation of the UWB (Ultra-wideband) based outer space satellite formation is established. According to the wide bandwidth of UWB signal, free space loss of UWB signal should be calculated using integral within a frequency region. The problem of the selection of monocycle pulse which is suitable for UWB communication system of satellite formation is analyzed. The equation reveals the relations among the system parameters, such as the Bit Error Rate (BER), transmission distance and data transmission rates, different orders of Gaussian pulse and transmitted power. Simulation results show that: in the same situation of BER, transmission distance and data transmission rate, the first order Gaussian pulse has the minimum transmitted power. Due to satellite formation limited of payload, the first order Gaussian pulse should be employed as the carrier waveform.