Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2005-08-31
2009-11-10
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S260000
Reexamination Certificate
active
07616716
ABSTRACT:
A radio receiver is suitable for use in an OFDM wireless communications system, in which it is necessary to identify a timing point at a start of a frame. In order to ensure optimum performance of the receiver in multipath environments, it should be synchronised with the first received multipath component, although one or more of the delayed multipath components may be stronger than the first component. A method of determining the time position of the first received multipath component, determines a correlator function from the received signal, and determines the required timing point from a falling edge in a derivative of the correlator function.
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Van de Beek et al., “ML Estimation of Time and Frequency Offset in OFDM Sytems,” IEEE Transactions on Signal Processing, vol. 45, No. 7, Jul. 1997, pp. 1800-1805.
Beach Mark Anthony
Williams Christopher
Huang David
Liu Shuwang
University of Bristol
Weaver Austin Villeneuve & Sampson LLP
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