Scattered pilot location detector

Details Scattered pilot location detector Scattered pilot location detector

2007-09-27

2011-10-25

Tse, Young T. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

08045630

ABSTRACT:
A detector of patterns corresponding to pilot symbols is capable of detecting patterns of SP symbols promptly without using a TMCC signal. The SP location detector includes a multiplier which multiplies received signals generated by demodulating OFDM modulation signals in which pilot symbols are dispersively disposed in accordance with four types of patterns and which are transmitted periodically by a pseudo-random number bit sequence, four arithmetic circuits which are respectively provided corresponding to the four types of patterns and which respectively extract pilot symbols corresponding to respective patterns from results of multiplication by the multiplier and calculate sums of phase differences between the extracted pilot symbols, followed by outputting absolute values thereof, and a pattern detection circuit which detects the corresponding arithmetic circuit maximum in the calculated absolute value from within the four arithmetic circuits.

REFERENCES:
patent: 2004/0190657 (2004-09-01), Seki et al.
patent: 2004/0252629 (2004-12-01), Hasegawa et al.
patent: 2008/0165871 (2008-07-01), Kisoda et al.
patent: 2004-153811 (2004-05-01), None
patent: 2005-045664 (2005-02-01), None

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