Automated Algorithm for Accurate Doppler Profile Detection of MST Radar Signals Considering Removal of Interference
N.Padmaja1, D. Leela Rani2, M. Bharathi3 

1N.Padmaja, Professor of ECE, Center for Communication and Signal Processing, Sree Vidyanikethan Engineering College, Tirupati.
2D.Leela Rani, Professor of ECE, Center for Communication and Signal Processing, Sree Vidyanikethan Engineering College, Tirupati
3M.Bharathi, Assistant Professor of ECE, Center for VLSI & Embedded Systems, Sree Vidyanikethan Engineering College, Tirupati.

Manuscript received on 19 March 2019 | Revised Manuscript received on 24 March 2019 | Manuscript published on 30 July 2019 | PP: 1134-1138 | Volume-8 Issue-2, July 2019 | Retrieval Number: B1693078219/19©BEIESP | DOI: 10.35940/ijrte.B1693.078219
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Abstract: Identifying the accurate radar echo returns from the MST (Mesosphere-Stratosphere–Troposphere) region poses serious challenges, as the radar echo signals are of very low amplitude and hidden in noise. The process of extraction of the relevant signal information becomes intricate when the spectra sometimes are infected with interference signals of non-atmospheric origin. An automated algorithm is suggested for eliminating the interference bands in the Doppler spectra of MST radar signals. The process of removal of interference and de-noising of the radar echoes using soft thresholding techniques was achieved simultaneously. The algorithm was practically applied to interference contaminated MST radar data taken from National Atmospheric Research Laboratory (NARL), Gadanki, Tirupati and studied for removal of interference bands. It was found that the projected algorithm effectively removes multiple interference bands and also improves signal detectability. The power and Doppler values (moments) are estimated using FFT and HHT (Hilbert Huang Transform) and median Doppler is plotted on Doppler power spectrum and compared.
Index Terms: MST Radar, Doppler Power Spectrum, FFT, Interference, HHT.

Scope of the Article: Automated Software Specification