Sampling and recovery of radio astronomy signals based on improved Modulation Broadband Converter

In order to solve the problem that the +1/-1 pseudo-random cycle sequence is difficult to realize in the modulation broadband converter hardware circuit,0/Vs_max apseudo-random periodic sequence realization in hardware circuit is proposed,cancel the voltage offset circuit,amplify the signal generation module output signal directly,by adjusting the amplifier parameters to generate 0/Vs_max perioclic pseudo-random seguence.The simulation experiment on the radio astronomy signals measured by the Yunnan Observatory is carried out to verify the reconstruction performance of the MWC sampling system.The simulation results show that the MWC system using 0/Vs_max pseudo-random period sequence has better signal reconstruction performance,and directly proves that the proposed 0/Vs_max pseudo-random periodic sequence is excellent for signal reconstruction in MWC system.