Accession Number : AD1024210


Title :   Signal Separation of Helicopter Radar Returns Using Wavelet-Based Sparse Signal Optimisation


Descriptive Note : Technical Report


Corporate Author : Defence Science and Technology Group Edinburgh, South Australia Australia


Personal Author(s) : Nguyen,Si T ; Kodituwakku,Sandun ; Melino,Rocco ; Tran,Hai-Tan


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1024210.pdf


Report Date : 01 Oct 2016


Pagination or Media Count : 70


Abstract : A novel wavelet-based sparse signal representation technique is used to separate the main and tail rotor blade components of a helicopter from the composite radar returns. The received signal consists of returns from the rotating main and tailrotor blades, the helicopter body, possible land or sea clutter, and other residual components, which may all overlap in time and frequency; and therefore conventional time and frequency separation techniques cannot be applied. A sparse signal representation technique is now proposed for this problem with the tunable Q wavelet transform used as the dictionary. The proposed algorithm is demonstrated using both simulated and real radar data (X and Ku-band), and is capable of extracting the components of interest successfully.


Descriptors :   helicopters , helicopter rotors , tail rotors , algorithms , Foreign government


Subject Categories : Helicopters
      Government and Political Science


Distribution Statement : APPROVED FOR PUBLIC RELEASE