Apparatus and method for selecting optimal beam for digital...

Pulse or digital communications – Receivers – Particular pulse demodulator or detector

Reexamination Certificate

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C375S349000, C375S347000, C375S346000, C375S148000, C375S150000

Reexamination Certificate

active

07315589

ABSTRACT:
There is provided to an apparatus and method for selecting a beam having an optimal channel characteristic among multiple beams, which are formed at a digital TV receiver employing a switched beamforming part. The beam selecting apparatus of the digital TV receiver having a switched beamformer and a channel equalize includes: a correlating unit for calculating cross-correlation values with respect to previous known Field Sync signals and Field Sync signals of beams having energy larger than a predefined value among beams outputted from the switched beamformer; a channel profile extracting unit for extracting multi-path channel profiles of the beams by using the cross-correlation values; an effective signal path searching unit for obtaining the number of effective signal paths having values larger than a predefined threshold based on the channel profiles; and a beam selecting unit for selecting beams of a channel profile having the smallest number of the effective signal paths among the beams outputted from the switched beamforming means as an input beam of the channel equalizer.

REFERENCES:
patent: 6714584 (2004-03-01), Ishii et al.
patent: 6946993 (2005-09-01), Seo et al.
patent: 7103120 (2006-09-01), Shibata
patent: 7209512 (2007-04-01), Jitsukawa et al.
patent: 2001-0093207 (2001-10-01), None
patent: 2002-0003876 (2002-01-01), None
patent: 2002-0033788 (2002-05-01), None
patent: 2002-0049358 (2002-06-01), None

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