A novel refinement technique for 2-D PPS parameter estimation
2013; Elsevier BV; Volume: 94; Linguagem: Inglês
10.1016/j.sigpro.2013.06.033
ISSN1872-7557
AutoresMarko Simeunović, Igor Djurović, Slobodan Djukanović,
Tópico(s)Advanced Electrical Measurement Techniques
ResumoThis paper considers refinement in parameter estimation of 2-D polynomial phase signals (PPSs). For this purpose, a method based on phase unwrapping, filtering and polynomial fitting is developed. In the method, 2-D parameter estimation is reduced to 1-D refinement procedure, thus significantly gaining in calculation efficiency. As initial estimates, the proposed method takes the estimates provided by any 2-D parameter estimator. In this paper, we use initial estimates provided by the standard Francos–Friedlander algorithm. Numerical simulations performed on third-order 2-D PPSs show that mean squared error of the proposed estimator reaches the Cramér–Rao lower bound above the signal-to-noise ratio threshold.
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