THE EFFECT OF EXPONENTIAL/COSINE HYPERBOLIC/ POLYNOMIAL/ KAISER WINDOW PARAMETERS CG-ICG-ENBW-SL ON THE SNR IMPROVEMENT OF MST RADAR SIGNALS

Abstract

In this paper, the effect of Exponential/Cosine Hyp erbolic/Polynomial/Kaiser window parameters Coheren t Gain (CG), Incoherent Power Gain (ICG), Equivalent Noise Band Width (ENBW ) and Scalloping Loss (SL) on the SNR values of MST Radar returns has been investigated. Six sets of multibeam observatio ns of the lower atmosphere made by the Indian Mesos phere-StratosphereTroposphere (MST) RADAR are used for the result ana lysis. Prior to the Fourier Transform, the in-phase and quadrature components of the Radar echo samples are weighted with Exponen tial/Cosine Hyperbolic/Polynomial/Kaiser window Fun ctions. It is observed that, with the increase in the parameter “ α” of Exponential and Cosine Hyperbolic Window and p“m” of Polynomial Window increases ENBW and SL, but decreases in CG a This observation can be used to establish in improving the Signal to Noise Ratio (SNR) of MST RADAR signals. From this s tudy it is reported that, the window e parameter “ α=6/m=4”can be suggested for optimum results of SNR improvement in MST RADAR signals. The optimum widow parameter“ α/m” in turn yields optimum Exponential window parameters as “CG=0.4768, ICG=0. 3495, ENBW=1.5371, SL=0.8536”, Cosine Hyperbolic wi ndow parameters as “CG=0.4769, ICG=0.3495, ENBW=1.5366, SL=0.8535”, Polynomial window parameters as “CG=0.5719, ICG=0. 4799, ENBW=1.4673, SL=0.8011”, and Kaiser window paramete rs as “CG=0.4991, ICG=0.3660, ENBW=1.4695, SL=0.841 0”.Which corresponds to optimum mail lobe width and side lob e attenuation to increase the SNR of MST Radar nois y data..