Adaptive ZCDPLL for Quadrature-Quadrature PSK Carrier Recovery

Author

Nasir, Qassim

Author_Institution

Dept. of Electr. & Comput. Eng., Sharjah Univ., Shariah

fYear

2006

fDate

4-7 Dec. 2006

Firstpage

1520

Lastpage

1522

Abstract

A second order zero crossing digital phase locked loop (ZCDPLL) with time varying loop gains is applied to Quadrature-Quadrature phase shift keying Q²PSK modem for carrier recovery. The ZCDPLL consists of an adaptive Kalman estimator which estimates the phase offsets of a received data bearing passband signal. The ZCDPLL digital filter gains are updated using the recursive least squares (RLS) algorithm. The performance of the use of adaptive ZCDPLL for Q²PSK modem for carrier recovery is evaluated and compared with fixed gains case. Simulation results for the variable gain ZCDPLL compared to a fixed gains show the improved the probability of error performance

Keywords

adaptive Kalman filters; digital phase locked loops; least squares approximations; modems; phase shift keying; PSK carrier recovery; ZCDPLL; adaptive Kalman estimator; adaptive digital phase locked loops; phase shift keying; recursive least squares; zero crossing digital phase locked loop; Digital filters; Kalman filters; Least squares methods; Modems; Passband; Performance gain; Phase estimation; Phase locked loops; Phase shift keying; Resonance light scattering; adaptive digital phase locked loops; digital phase locked loops; non-uniform sampling;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on

Conference_Location

Singapore

Print_ISBN

1-4244-0387-1

Type

conf

DOI

10.1109/APCCAS.2006.342512

Filename

4145693