Title :
Application and performance of a dual-loop adaptive RLS Kalman estimator for carrier recovery in a Q2PSK system
Author :
Cilliers, J.E. ; Linde, L.P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Pretoria Univ., South Africa
Abstract :
This article describes the application of a dual-loop digital phase-locked loop (DPLL) in a Q2PSK modem for carrier recovery. The DPLL consists of an adaptive Kalman estimator which estimates the phase and frequency offsets of a received data bearing passband signal. The parameters of the Kalman estimator are updated by means of a recursive least squares (RLS) algorithm. The performance of this carrier recovery strategy is evaluated for some typical mobile channel carrier frequency offsets
Keywords :
adaptive Kalman filters; digital phase locked loops; frequency estimation; least squares approximations; modems; phase estimation; quadrature phase shift keying; recursive estimation; synchronisation; DPLL; Q2PSK modem; RLS algorithm; adaptive Kalman estimator; carrier recovery; dual-loop digital phase-locked loop; frequency offset estimation; mobile channel carrier frequency offsets; passband signal; phase estimation; recursive least squares algorithm; Frequency estimation; Kalman filters; Least squares approximation; Modems; Passband; Phase estimation; Phase locked loops; Phase shift keying; Recursive estimation; Resonance light scattering;
Conference_Titel :
Africon, 1999 IEEE
Conference_Location :
Cape Town
Print_ISBN :
0-7803-5546-6
DOI :
10.1109/AFRCON.1999.820784
