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星载微波辐射计的天线提供的是宽带噪声功率信号。为了对微波辐射计进行星载条件下的仿真研究,本文采用伪随机信号来仿真微波辐射计的输入信号。所仿真的输入信号通过微波辐射计仿真模型与实际噪声信号输入到实际微波辐射计系统的对比结果表明了其良好的线性度,目标辐射信号的特征可用适当分布的随机噪声的数字特征表现,能用于进一步的仿真研究。
Antenna for a spaceborne microwave radiometer provides a broadband noise power signal. In order to simulate the microwave radiometer under the spaceborne condition, the pseudo-random signal is used to simulate the input signal of the microwave radiometer. The simulated input signal through the simulation model of the microwave radiometer and the input of the actual noise signal to the actual microwave radiometer system show the good linearity. The characteristics of the target radiation signal can be represented by the digital characteristics of random noise with proper distribution. Used for further simulation studies.