Title :
Single frequency estimation with non-uniform sampling
Author :
Gansman, J.A. ; Krogmeier, J.V. ; Fitz, M.P.
Author_Institution :
Sch. of Electr. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
A new frame structure is proposed for pilot symbol assisted modulation (PSAM) systems which includes a small number of known pilots at the start of each frame. This facilitates the estimation of large frequency offsets without aliasing. Cramer Rao lower bounds and the exact ML estimates are derived for AWGN and Rayleigh fading channels. Finally, simulations show that the ML estimator has much better performance than existing reduced complexity estimators when applied to this sparse observation model.
Keywords :
Gaussian channels; Rayleigh channels; fading; frequency estimation; maximum likelihood estimation; modulation; signal sampling; AWGN channels; Cramer Rao lower bounds; ML estimates; PSAM systems; Rayleigh fading channels; frame structure; frequency offsets; nonuniform sampling; performance; pilot symbol assisted modulation; pilots; single frequency estimation; sparse observation model; AWGN; Fading; Frequency estimation; Gaussian noise; Maximum likelihood estimation; Phase estimation; Probability density function; Sampling methods; Signal to noise ratio; Transmitters;
Conference_Titel :
Signals, Systems and Computers, 1996. Conference Record of the Thirtieth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-8186-7646-9
DOI :
10.1109/ACSSC.1996.600934
