Improved SNR of MST RADAR Signals by Cosine Hyperbolic Window over Kaiser Window

Abstract–In this paper, the effect of window shape parameter “?” in Cosine Hyperbolic Window Function on the SNR values of MST RADAR returns has been investigated. Six sets of multibeam observations of the lower atmosphere made by the Indian Mesosphere-Stratosphere-Troposphere (MST) RADAR are used for the result analysis. Prior to the Fourier Transformation, the in-phase and quadrature components of the RADAR echo samples are weighted with the recently proposed new class of adjustable window based on the Cosine Hyperbolic Window Function. The effects of data weighting with the variation of the window shape parameter “?” of the Cosine Hyperbolic Window Function is presented. It is observed that the increase of “?” increases the SNR values and a good improvement is reported. Optimum value of the shape parameter “?” for the Cosine Hyperbolic Window Function is suggested to analyze the MST RADAR signals. The results also shows that, the improvement of SNR of noisy data due to the effect of side lobe reduction and demands for the design of optimal windows.