Radio receiver and radio reception method

Details Radio receiver and radio reception method Radio receiver and radio reception method

2009-03-12

2011-11-15

Lam, Tuan T (Department: 2816)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S302000, C455S255000, C455S259000

Reexamination Certificate

active

08060046

ABSTRACT:
The radio receiver includes: a mixer configured to convert a received signal to an IF signal using a local oscillation signal; an IF processing section configured to limit the band of the IF signal; a detection section configured to demodulate the band-limited IF signal; a frequency control section configured to output a frequency control signal corresponding to a desired signal; and a local oscillation section configured to generate the local oscillation signal having a frequency corresponding to the desired signal according to the frequency control signal. The frequency control section outputs as the frequency control signal to change the frequency of the local oscillation signal so that the difference from the frequency corresponding to the desired signal is not more than the frequency of the IF signal, and determines one of the set values with which the corresponding image signal strength is lowest as the frequency control signal.

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patent: 6215829 (2001-04-01), Tomiyama
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patent: 7848453 (2010-12-01), Pan
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patent: 2006/0154640 (2006-07-01), Oh et al.
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patent: 2005-192018 (2005-07-01), None
patent: WO 01/48909 (2001-07-01), None

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