Title :
On blind carrier recovery in time-selective fading channels
Author :
Ghogho, Mountr ; Swami, Ananthram ; Durrani, Tariq
Author_Institution :
Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK
Abstract :
This paper considers the problem of blind (non-data aided) symbol clock and frequency offset estimation in the context of time-selective fading communication channels. The performance of estimators based on cyclic correlation is analyzed and optimality issues are addressed. Closed-form expressions for the Cramer-Rao bound are developed under the Gaussian assumption. Extensions of the algorithm to staggered modulation (e.g., OQPSK) are studied. In this case, synchronization generally requires fourth-order cyclic statistics.
Keywords :
Rician channels; correlation methods; frequency estimation; higher order statistics; optimisation; quadrature phase shift keying; synchronisation; Cramer-Rao bound; Gaussian assumption; OQPSK; Rician channel; algorithm; blind carrier recovery; blind symbol clock; closed-form expressions; cyclic correlation; discrete-time signal model; estimator performance; fourth-order cyclic statistics; frequency offset estimation; nondata aided symbol clock; optimality; staggered modulation; synchronization; time-selective fading channels; time-selective fading communication channels; Additive noise; Autocorrelation; Bandwidth; Clocks; Colored noise; Delay effects; Fading; Frequency estimation; Frequency synchronization; Matched filters;
Conference_Titel :
Signals, Systems, and Computers, 1999. Conference Record of the Thirty-Third Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5700-0
DOI :
10.1109/ACSSC.1999.832330
