Sinusoidal digital phase-locked loop (SDPLL)
                                                        
                                                                                                            
                                                            Cramer-Rao bound (CRB)
                                                        
                                                                                                            
                                                            colored noise
                                                        
                                                                                                            
                                                            frequency error variance
                                                        
                                                                                                            
                                                            signal-to-noise ratio (SNR).
                                                        
                                                                                                                                                                                         
                                                                        
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                                        The problem of frequency estimation of a single sinusoid observed in colored noise is addressed. Our estimator is based on the operation of the sinusoidal digital phase-locked loop (SDPLL) which carries the frequency information in its phase error after the noisy sinusoid has been acquired by the SDPLL. We show by computer simulations that this frequency estimator beats the Cramer-Rao bound (CRB) on the frequency error variance for moderate and high SNRs when the colored noise has a general low-pass filtered (LPF) characteristic, thereby outperforming, in terms of frequency error variance, several existing techniques some of which are, in addition, computationally demanding. Moreover, the present approach generalizes on existing work tha
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