A novel non-data-aided symbol timing recovery technique for OFDM systems

A new highly efficient non-data-aided technique to recover symbol timing of orthogonal frequency-division multiplexing systems is proposed. The algorithm in the proposed work exploits the interference that results due to the loss of orthogonality between subcarriers, where the second-order statistic...

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Vydáno v:IEEE transactions on communications Ročník 54; číslo 1; s. 37 - 40
Hlavní autor: Al-Dweik, A.J.
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York, NY IEEE 01.01.2006
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Additive white noise
Algorithms
Applied sciences
Carrier frequency offset (CFO)
Channels
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Fading
Frequency division multiplexing
Frequency synchronization
Information, signal and communications theory
Interference
OFDM
Offsets
Orthogonal Frequency Division Multiplexing
orthogonal frequency-division multiplexing (OFDM)
Sampling methods
Signal and communications theory
Signal, noise
Statistics
symbol synchronization
Symbols
Synchronism
System performance
Telecommunications and information theory
Time measurements
Timing
Fading channels
Carrier frequency
Orthogonal frequency division multiplexing
Carrier frequency offset (CFO)
symbol synchronization
Frequency offset
Timing
Synchronization
Multipath channels
Signal detection
orthogonal frequency-division multiplexing (OFDM)
ISSN:0090-6778, 1558-0857
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Popis
Shrnutí:A new highly efficient non-data-aided technique to recover symbol timing of orthogonal frequency-division multiplexing systems is proposed. The algorithm in the proposed work exploits the interference that results due to the loss of orthogonality between subcarriers, where the second-order statistics of the resulting interference is proportional to the offset from the optimum sampling point. The presented technique does not require prior fine carrier synchronization, and it is capable of extracting symbol timing at low E/sub s//N/sub 0/ values with large carrier frequency offsets (CFOs). The system performance was investigated in multipath fading channels with large CFOs and additive white Gaussian noise.
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ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2005.861676