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CPF-HAF estimator of polynomial-phase signals

2011; Institution of Engineering and Technology; Volume: 47; Issue: 17 Linguagem: Inglês

10.1049/el.2011.1896

1350-911X

Marko Simeunović, Igor Djurović,

Machine Fault Diagnosis Techniques

A simple and effective modification of the high-order ambiguity function (HAF) is introduced. The number of phase differentiations is decreased to two with respect to the HAF. The obtained signal has a cubic phase, the parameters of which can be estimated using the cubic phase function (CPF) in the final stage. The SNR threshold of the proposed modification is reduced for 9 dB with respect to the HAF, while the MSE is about 2 dB less.