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Phase Estimation Accuracy Based on Piecewise Polynomial-Phase Modeling Method with Short Sequences |
Lu Kun; Liu Xing-zhao |
Department of Electronic Engineering Shanghai Jiaotong University Shanghai 200030 China |
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Abstract In this paper, the performance of polynomial phase coefficient estimation algorithm based on High-order iguity Function (HAF) for non-polynomial phase signal with short sequences is discussed in detail. Further, ntaneous phase estimation method is developed on the basis of the idea of this algorithm. The main idea of the ;ssed algorithm is to divide the data sequence into several segments, approach the instantaneous phase of each short Lent by a low-order polynomial, estimate the parameters of the modeling polynomial-phase signal by HAF and Product methods, and finally integrate the whole phase with estimated instantaneous phase of each segment. The estimation mnance depends comparatively on the achievable accuracy of the segmented phase. The disadvantage of /PHAF-based polynomial-phase estimation method with short and non-polynomial phase sequences is analyzed in this r and some general conclusions are drawn after simulations.
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Received: 18 December 2003
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