【摘要】 取样脉冲是影响超宽带无线电引信接收机性能的关键因素。在分析取样积分微分电路工作原理的基础上,建立了其频域和时域数学模型。结合无载波信号的时域多普勒效应,提出了基于Matlab的超宽带无线电引信接收机输出信号时域仿真方法。研究了取样脉冲宽度和幅度对电路输出波形的影响,结果表明:电路完全对称时,输出信号幅度只与取样脉冲宽度有关,但并非单调关系;非对称时,电路达到稳态前产生一个脉冲信号,脉冲幅度与取样脉冲的幅度成正比,宽度成反比。更多还原

【Abstract】 Sampling pulse is the key factor affecting the performance of ultra wideband(UWB) radar fuze receiver.Based on the analysis of working principle of sampling integral differential circuit,the mathematical models of frequency domain and time domain are established.Considering the Doppler effect in time domain,a time domain simulation method of the output signal of UWB radar fuze receiver based on Matlab is proposed.The simulation results of the influences of sampling pulse width and amplitude on output waveform show that when the circuit is completely symmetrical,the amplitude of the output signal is only related to sampling pulse width, but not in a monotonic relation.When the circuit is unsymmetrical,it generates a pulse signal before steady state,and the amplitude of the pulse varies proportionately with the amplitude of the sampling pulse but inversely with the width of the sampling pulse.更多还原