Title :
Low complexity frequency estimator with close-to-optimum performance
Author_Institution :
Communications Research Centre, Ottawa, Ont., Canada
Abstract :
A low complexity, open-loop, discrete-time, delay-multiply-average (DMA) technique for estimating the frequency offset for digitally modulated MPSK signals is investigated. A nonlinearity is used to remove the MPSK modulation and generate the carrier component to be extracted. Theoretical and simulated performance results are presented and compared to the Cramer-Rao lower bound (CRLB) for the variance of the frequency estimation error. For all signal-to-noise ratios (SNRs) above threshold, it is shown that performance very close to the CRLB can be achieved with linear complexity
Keywords :
discrete time systems; frequency estimation; phase shift keying; Cramer-Rao lower bound; delay-multiply-average technique; digitally modulated MPSK signals; discrete time; frequency estimation error; frequency estimator; frequency offset; linear complexity; nonlinearity; open loop; performance; Baseband; Chirp modulation; Delay estimation; Digital modulation; Fast Fourier transforms; Frequency estimation; Frequency synchronization; Maximum likelihood estimation; Signal to noise ratio; Uncertainty;
Conference_Titel :
Universal Personal Communications, 1993. Personal Communications: Gateway to the 21st Century. Conference Record., 2nd International Conference on
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-1396-8
DOI :
10.1109/ICUPC.1993.528421
