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研究了在上行干扰条件下软限幅卫星转发器中滤波器带宽对系统性能的影响。分别给出了信号、干扰和噪声的合成包络与相位的联合概率密度函数的计算方法 ,并通过对限幅器输出信号分别相对于合成包络和相位求平均 ,计算输出信号中包含的周期信号和非周期信号功率 ,从而计算小信号的功率压缩情况。通过应用专用仿真软件 ACOLADE,对在上行干扰条件下转发器中滤波器带宽对小信号压缩的影响进行了仿真 ,给出了小信号压缩相对于滤波器带宽的仿真曲线。
The effect of filter bandwidth on system performance in soft-limiting satellite transponders under uplink interference conditions is studied. The method of calculating the joint probability density function of the synthetic envelope and the phase of the signal, the interference and the noise respectively is given. The period included in the output signal is calculated by averaging the limiter output signal with respect to the composite envelope and the phase, respectively Signal and aperiodic signal power to calculate the small signal power compression. Through the application of special simulation software ACOLADE, the influence of filter bandwidth on small signal compression in uplink transponder is simulated, and the simulation curve of small signal compression with respect to filter bandwidth is given.