Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2007-06-05
2007-06-05
Shah, Chirag G. (Department: 2616)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S203000, C370S350000, C370S503000
Reexamination Certificate
active
09807959
ABSTRACT:
In an OFDM receiver, a synchronisation pulse for defining a Fast Fourier Transform window is generated by examining the output of a correlator to find a sub-interval within which there is maximum correlation between samples of the symbol separated by the length of the useful part of the symbol. The synchronisation pulse is generated during this sub-interval (102). Adjustments to the timing of the synchronisation pulse are made only if the current error is significant and persistent. A signal representing the amount of adjustment is used to determine phase rotations applied to the output of the FFT circuit.
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Barton Stephen K.
Brunt Stephen M.
Echavarri Javier
Orriss John
Mitsubishi Kabushiki Kaisha
Shah Chirag G.
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