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On the Application of a Novel Hybrid Harmony Search Algorithm to the Radar Polyphase Code Design Problem

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5 Author(s)
Del Ser, J. ; Telecom Unit, Tecnalia Res. & Innovation, Zamudio, Spain ; Gil-Lopez, S. ; Perez-Bellido, A. ; Salcedo-Sanz, S.
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Polyphase codes are widely used in radar systems as a pulse compression approach due to the fact that they produce lower side-lobes in the compressed signal than other methods. Unfortunately, the efficient design of such codes comprises by itself a non-linear n-dimensional NP-hard optimization problem, which has been so far tackled by using evolutionary techniques. In this paper we present a novel heuristic approach consisting of a Harmony Search algorithm hybridized with both a dynamic-step gradient-guided and a random walk local search procedures. The second procedure is applied when the gradient of the underlying fitness function is zero, i.e. when facing a flat region during the search process over the solution space. A simulation-based comparison study with the best results found in the literature is presented, from where it is concluded that our proposed algorithm outperforms other existing approaches in the literature for n = 1,...,15.

Published in:

Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd

Date of Conference:

15-18 May 2011