Frame timing and carrier frequency recovery for frequency selective signals

UNSPECIFIED (2011) Frame timing and carrier frequency recovery for frequency selective signals EP 2 245 814 B1.

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Abstract

The present invention relates to digital receivers in a frequency-selective (wideband) channel and in particular to frame/symbol timing and carrier frequency synchronization in the reception of orthogonal frequency-division multiplexing (OFDM) signals. The present invention provides a method of synchronizing a receiver to a received signal, wherein the signal includes a training symbol having two identical parts, the method including determining a degree of autocorrelation between parts of the signal at the spacing of the two identical parts, and a degree of cross-correlation between parts of the received signal and a reference copy of the training symbol, and multiplying together the autocorrelation and crosscorrelation to determine at least one of the timing and the frequency of the received signal. This may be achieved by multiplying the cross-correlation and autocorrelation directly, or by multiplying a function, which may be referred to as a timing metric, of one of them with the other, or my multiplying functions of both of them together.

Item Type:	Patent
Authors :	Name Email ORCID Awoseyila, AB A.Awoseyila@surrey.ac.uk Evans, BG b.evans@surrey.ac.uk Kasparis, C
Date :	17 August 2011
Identification Number :	EP 2 245 814 B1
Uncontrolled Keywords :	Synchronization, Frame Timing, Carrier Frequency, OFDM, Frequency Selective Signals, autocorrelation, cross correlation, threshold detection
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 12:32
Last Modified :	17 May 2017 15:04
URI:	http://epubs.surrey.ac.uk/id/eprint/835758

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