Digital broadcasting receiver

Details Digital broadcasting receiver Digital broadcasting receiver

1997-04-25

1999-09-28

Olms, Douglas W.

Multiplex communications

Generalized orthogonal or special mathematical techniques

370210, 370320, H04J 1100

Patent

active

059599650

ABSTRACT:
It is an object to correct a frequency deviation at the time of reception of a digital signal in which each carrier is subjected to phase modulation and orthogonal frequency division multiplexing (OFDM). A vector of fixed pattern symbols for reference of received carriers is multiplied by a vector of conjugate complex numbers of the defined values for each element. In the result, elements separated by the same numbers forward and backward from an element at a particular carrier frequency are multiplied together and the results are added. The same processing is applied to cases in which the elements of the vectors are mutually shifted by a plurality of elements from a certain correspondence and synchronization control to the broadcasting frequency is provided on the basis of a value which maximizes the absolute value in the results of the addition and the correspondence at that time.

REFERENCES:
patent: 5191576 (1993-03-01), Pomier et al.
patent: 5228025 (1993-07-01), Le Floch et al.
patent: 5371761 (1994-12-01), Daffara et al.
patent: 5506836 (1996-04-01), Ikeda et al.
patent: 5550812 (1996-08-01), Philips
Kammeyer; Nachrichtenubertragung. Stuttgart: Teubner, 1992, pp. 593-605, pp. 611-613.

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