Designing training sequences for carrier frequency estimation in frequency-selective channels

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A procedure for selecting a training sequence (TS) is developed for frequency estimation in frequency-selective channels. An expression for the unconditional Cramer-Rao bound (UCRB) is obtained by averaging the CRB for frequency estimation over the probability density function of Gaussian random channels. In addition, a necessary and sufficient condition for minimizing the UCRB is derived. Based on these results, a procedure for selecting a TS is developed. Through a computer search, binary TSs up to length 24 are found and tabulated. It is observed that periodic TSs tend to be selected when the TS length is twice the channel duration. Simulation results demonstrate that the proposed TSs can enhance the performance of the maximum likelihood (ML) frequency estimate.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2006-01
Language
English
Article Type
Article
Keywords

FADING CHANNELS; TRANSMISSIONS; OFFSET

Citation

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, v.55, pp.151 - 157

ISSN
0018-9545
DOI
10.1109/TVT.2005.861173
URI
http://hdl.handle.net/10203/12233
Appears in Collection
EE-Journal Papers(저널논문)
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