Title :
Fast carrier recovery for burst-mode coherent demodulation using feedforward phase and frequency estimation techniques
Author :
Caouras, Nestor ; Morawski, Robert ; Le-Ngoc, Tho
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
Abstract :
This paper describes novel feedforward data-aided digital estimation algorithms for determining carrier phase and frequency offsets independently in a burst-mode linear channel environment corrupted by additive white Gaussian noise. The techniques are applicable to linear modulation schemes (M-PSK, M-QAM) and based on oversampling of a known preamble. The estimators´ performance is analyzed, simulated and verified experimentally for QPSK/OQPSK systems. Experimental results demonstrate that the techniques provide a fast synchronization using a short preamble and low complexity.
Keywords :
AWGN; demodulation; feedforward; frequency estimation; phase estimation; phase shift keying; quadrature amplitude modulation; quadrature phase shift keying; signal sampling; synchronisation; telecommunication channels; Cramer-Rao lower bound; M-PSK; M-QAM; QPSK/OQPSK systems; additive white Gaussian noise; burst-mode coherent demodulation; burst-mode linear channel; carrier frequency offset; carrier phase offset; experimental results; fast carrier recovery; fast synchronization; feedforward data-aided digital estimation algorithms; feedforward frequency estimation; feedforward phase estimation; linear modulation; low complexity; oversampling; performance analysis; short preamble; AWGN; Additive white noise; Demodulation; Feedback; Filters; Frequency estimation; Maximum likelihood estimation; Phase estimation; Phase shift keying; Sampling methods;
Conference_Titel :
Electrical and Computer Engineering, 1999 IEEE Canadian Conference on
Conference_Location :
Edmonton, Alberta, Canada
Print_ISBN :
0-7803-5579-2
DOI :
10.1109/CCECE.1999.807174
