Influence analysis of noise on sensitivity and 1/f noise removal in a 220GHz radiometer

As a high sensitivity receiver system, radiometer is greatly affected by system noise. Noise suppression is important to improve the performance of radiometer. In this paper, the millimeter-wave radiometer is modeled to analyze the influence of noise on the sensitivity of radiometer. A new method of 1/f noise removal based on the parameter estimation of power spectral density (PSD) is proposed. The PSD and sensitivity before and after filtering are obtained by simulation. The results show that our method can effectively remove the 1/f noise.