A Novel Approach to Improve the Wind Profiler Doppler Spectra Using Wavelets

Volume 4 Issue 4 October - December 2016

Research Paper

A Novel Approach to Improve the Wind Profiler Doppler Spectra Using Wavelets

P. Krishna Murthy*, S. Narayana Reddy**

* Research Scholar, Department of Electronics & Communication Engineering, SVU College of Engineering, Tirupati. A.P, India.

** Professor, Department of Electronics & Communication Engineering, SVU College of Engineering, Tirupati, A.P, India.

Murthy, K. P, and Reddy, N.S. (2016). A Novel Approach to Improve the Wind Profiler Doppler Spectra Using Wavelets. i-manager’s Journal on Digital Signal Processing, 4(4), 22-28. https://doi.org/10.26634/jdp.4.4.8313

Abstract

The dedicated VHF clear-air atmospheric radars built in the late 70’s and early 80’s were found to be capable of observing atmospheric parameters such as the three-dimensional wind vector. These radars measure wind continuously. Wind profiling radars yield real-time lower atmospheric wind profiles in continuous unattended operation. Wind profilers are necessary to measure the height profile of wind vector and Signal to Noise Ratio (SNR) by detecting the Doppler shift of echoes. The lower atmospheric signals, which are processed in the present work has been obtained from the LAWP radar at National Atmospheric Research Laboratory (NARL), Gadanki, India. This paper discusses estimation of the wind profile using Peak Detection Technique (PDT) and Db11 Wavelet. The fake peaks which are adjacent to the real in the radar data can be detected by applying the threshold. In order to get the true position of the object, those fake peaks should be removed and this is possible by using Peak Detection Technique. Effective Doppler shift for LAWP data is obtained by using Peak Detection Technique and compared with the doppler obtained for LAWP data using Daubechies Wavelet. Results shows that there is an effective doppler shift after using Db11 Wavelet.