학술논문
Resolving aliasing effect in the QML estimation of PPSs
Document Type
Periodical
Author
Source
IEEE Transactions on Aerospace and Electronic Systems IEEE Trans. Aerosp. Electron. Syst. Aerospace and Electronic Systems, IEEE Transactions on. 52(3):1494-1499 Jun, 2016
Subject
Language
ISSN
0018-9251
1557-9603
2371-9877
1557-9603
2371-9877
Abstract
The quasimaximum likelihood (QML) estimator of polynomial-phase signals (PPSs) is based on the maximization of the short-time Fourier transform and suffers from aliasing when signals are sampled below the Nyquist sampling rate. In this paper, a phase unwrapping procedure has been proposed as an additional step in the QML to estimate parameters of such signals. Statistical study has shown excellent performance of the proposed approach.