Apparatus and associated method of symbol timing recovery...

Details Apparatus and associated method of symbol timing recovery... Apparatus and associated method of symbol timing recovery...

2007-02-13

2007-02-13

Ghayour, Mohammed (Department: 2637)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S362000

Reexamination Certificate

active

10175368

ABSTRACT:
A receiver determines a symbol synch time for recovering data from a symbol of signal samples generated in accordance with Orthogonal Frequency Division Multiplexing. Each symbol includes a guard period which carries data repeated from a data bearing part of the symbol and pilot signal samples. The receiver compromises a pilot assisted tracker, a guard adapted filter processor and a filter controller. The controller is operable to excite the filter with the symbol signal samples to generate an output signal which provides a further representation of the channel impulse response. A symbol time adjustment estimator is operable to adjust the symbol synch time in accordance with the adjustment provided by at least one the pilot assisted tracker and the guard adapted filter processor. The pilot assisted tracker estimates the symbol synch time from a channel impulse response estimate generated from pilot signal samples.

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Yang B. et al., “Timing Recovery for OFDM Transmission”, IEEE Journal on Selected Areas in Communications, IEEE Service Center, Piscataway, NJ, US, vol. 18, No. 11, Nov. 2000, pp. 2278-2291, XP001063613, ISSN: 0733-8716.
Lee D. et al., “A New Symbol Timing Recovery Algorithm for OFDM Systems”, IEEE Transactions on Consumer Electronics, IEEE Service Center, New York, NY, US, vol. 43, No. 3, Aug. 1997, pp. 767-774, XP000742560, ISSN: 0098-3063.

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