Radio receiver with selectively disabled equalizer

Details Radio receiver with selectively disabled equalizer Radio receiver with selectively disabled equalizer

2005-08-05

2009-12-01

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S229000, C375S316000, C375S219000, C455S073000

Reexamination Certificate

active

07627030

ABSTRACT:
A controllable equalizer is arranged to be automatically and selectively disabled and is configured to operate in a frequency modulated (FM) radio receiver. The controllable equalizer includes an equalizer (115) that is configured to perform an equalization algorithm, e.g., CMA, that relies on a predetermined distribution for a received signal, where the received signal is available from the FM radio receiver and a spurious signal detector (123) that is configured to determine whether a spurious signal is present in the received signal and to disable the equalizer when the spurious signal is present. A method (300) of automatically and selectively disabling an equalizer operating in a frequency modulated (FM) radio receiver includes performing an equalization algorithm (307) on an FM received signal, the equalization algorithm relying on a predetermined distribution of the FM received signal, determining whether a spurious signal is present (309) in the FM received signal; and disabling the equalizer (317) when the spurious signal is present in the FM received signal.

REFERENCES:
patent: 5291519 (1994-03-01), Tsurumaru
patent: 5363411 (1994-11-01), Furuya et al.
patent: 5375143 (1994-12-01), Kazecki et al.
patent: 6658245 (2003-12-01), Li et al.
patent: 6972617 (2005-12-01), Hsieh et al.
patent: 2003/0099310 (2003-05-01), Zvonar
patent: 2003/0157914 (2003-08-01), Li et al.
patent: 2006/0280268 (2006-12-01), Sobchak et al.

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