中文摘要：

为解决调制宽带转换器（Modulated Wideband Converter，MWC）在实现过程中{＋1／-1}伪随机周期序列硬件电路难以实现的问题，提出了一种硬件电路容易实现的{O/Vs_max}伪随机周期序列，取消电压偏移电路，直接对信号发生模块输出信号进行放大处理，通过调节放大器参数产生需求的{O/Vs_max}周期伪随机序列．利用云南天文台实测的射电天文信号数据进行仿真实验，验证MWC系统对信号的重构性能．仿真结果表明，MWC系统采用{O/Vs_max}伪随机周期序列时降低了重构信号的均方误差，提高了重构精度，直接证明新提出的{O/Vs_max}伪随机周期序列在通道数大于16时MWC系统对原始信号重构的优异特性．

英文摘要：

In order to solve the problem that the { ＋ 1/-1 } pseudo-random cycle sequence is difficult to re-alize in the modulation broadband converter hardware circuit, {O/Vs_max}apseudo-random periodic sequencerealization in hardware circuit is proposed, cancel the voltage offset circuit, amplify the signal generation moduleoutput signal directly,by adjusting the amplifier parameters to generate {O/Vs_max} perioclic pseudo-randomseguence.The simulation experiment on the radio astronomy signals measured by the Yunnan Observatory is car-ded out to verify the reconstruction performance of the MWC sampling system.The simulation results show that theMWC system using {O/Vs_max} pseudo-random period sequence has better signal reconstruction performance,and directly proves that the proposed {O/Vs_max} pseudo-random periodic sequence is excellent for signal re-construction in MWC system. Key word： Sub-Nyquist sampling; Modulation Broadband Converter （ MWC ） ; radio astronomical signal ; sig-nal reconstruction