上行干扰条件下软限幅转发器中滤波器带宽的影响  

Effect of Filter Bandwidth in Soft-limiting Transponder with Uplink Interference

作　　者：郭道省[1] 沈忠良[1] 张邦宁[1] 甘仲民[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2002年第3期22-24,共3页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：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 in soft limiting satellite transponder with uplink interference is studied. The joint probability density function of the composite envelope and phase of the signal plus interference and noise at the output of the limiter and power amplifier is calculated. The power of the periodic and non periodic components is then found by averaging the limiter output signal with respect to the composite envelope and phase. The simulations are made for the effect of filter bandwidth in soft limiting transponder on small signal suppression by specific simulating software ACOLADE. The simulation curves are given for small signal suppression with respect to filter bandwidth.

关 键 词：软限幅转发器 上行干扰 滤波器带宽 小信号压缩 

分 类 号：TN973.3[电子电信—信号与信息处理]