Joint NDA Estimation of Carrier Frequency/Phase and SNR for Linearly Modulated Signals

Author

Gappmair, Wilfried ; López-Valcarce, Roberto ; Mosquera, Carlos

Author_Institution

Inst. of Commun. Networks & Satellite Commun., Graz Univ. of Technol., Graz, Austria

Volume

17

Issue

5

fYear

2010

fDate

5/1/2010 12:00:00 AM

Firstpage

517

Lastpage

520

Abstract

We consider the problem of joint non-data-aided (NDA) estimation of carrier frequency and phase offsets, together with that of signal and noise powers, obtained from the baud-rate samples of a linearly modulated signal distorted by Gaussian noise. The Crame??r-Rao lower bound (CRLB) is derived, for quadrature-symmetric constellations showing that the carrier parameters are decoupled from signal and noise powers. Furthermore, a joint NDA maximum-likelihood estimator is developed, based on the application of the expectation-maximization algorithm, which exhibits a jitter performance close to the CRLB for a wide SNR range.

Keywords

Gaussian noise; expectation-maximisation algorithm; modulation; signal processing; Cramer-Rao lower bound; Gaussian noise; SNR; baud rate samples; carrier frequency; carrier phase; expectation-maximization algorithm; joint non-data-aided estimation; linearly modulated signals; maximum likelihood estimator; noise powers; phase offsets; quadrature symmetric constellations; Carrier offset estimation; Cramér–Rao lower bound; SNR estimation; expectation-maximization algorithm;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2010.2045545

Filename

5431044