PLL-based frequency discriminator using the loop filter as an estimator

Author

Izadi, Mohammad Hadi ; Leung, Bosco

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Ont., Canada

Volume

49

Issue

11

fYear

2002

fDate

11/1/2002 12:00:00 AM

Firstpage

721

Lastpage

727

Abstract

In this paper we present a new phase-locked-loop-based frequency discriminator architecture that performs both A/D conversion and frequency demodulation. In addition, the loop filter is designed as a linear estimator. Two forms of linear estimators are investigated. Simulation results show that for a minimum shift key signal at 400 MHz IF, the proposed frequency discriminator achieves an SNR improvement of up to 5 dB over a large variety of noise/fading conditions.

Keywords

Kalman filters; Wiener filters; analogue-digital conversion; demodulation; discriminators; minimum shift keying; phase locked loops; 400 MHz; A/D conversion; IF signal processing; Kalman filter; SNR; Wiener filter; frequency demodulation; frequency discriminator; linear estimator; loop filter; minimum shift key signal; phase locked loop; Demodulation; Digital filters; Fading; Frequency conversion; Frequency estimation; Phase estimation; Phase locked loops; Signal processing; Signal to noise ratio; Wiener filter;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/TCSII.2002.807572

Filename

1177410