Scattered Signal Enhancement Algorithm Applied to Radar Target Discrimination Schemes

Diego-Pablo RUIZ  Antolino GALLEGO  Maria-Carmen CARRION  

IEICE TRANSACTIONS on Communications   Vol.E82-B   No.11   pp.1858-1866
Publication Date: 1999/11/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
radar target discrimination,  natural resonances,  singular value decomposition,  radar signal processing,  

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A procedure for radar target discrimination is presented in this paper. The scheme includes an enhancement of late-time noisy scattering data based on a proposed signal processing algorithm and a decision procedure using previously known resonance annihilation filters. The signal processing stage is specifically adapted to scattering signals and makes use of the results of the singularity expansion method. It is based on a signal reconstruction using the SVD of a data matrix with a suitable choice of the number of singular vectors employed. To justify the inclusion of this stage, this procedure is shown to maintain the signal characteristics necessary to identify the scattered response. Simulation results clearly reveal a significant improvement due to the inclusion of the proposed stage. This improvement becomes especially important when the noise level is high or the targets to be discriminated (five regular polygonal loops) have a similar geometry.