Receiver for use in wireless communications and method of...

Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion

Reexamination Certificate

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Details

C455S260000, C455S234100, C375S345000

Reexamination Certificate

active

07817980

ABSTRACT:
A wireless receiver (100) for receiving and demodulating a frequency modulated RF (radio frequency) signal by a direct conversion procedure, including channels (110, 112) for producing in-phase and quadrature components of a received RF signal, and a processor (123, 133) for periodically estimating an error in at least one of the in-phase and quadrature phase components and for producing a signal for adjustment of at least one of the in-phase and quadrature components to compensate for the detected error, wherein the processor is operable to apply alternatively each of a plurality of different procedures to estimate the error, the procedures including a first procedure which is applied when a signal quality value of the received RF signal is above a threshold value and a second procedure which is applied when a signal quality value of the RF received signal is not above the threshold value.

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patent: 6504884 (2003-01-01), Zvonar
patent: 6717995 (2004-04-01), Zvonar
patent: 6882208 (2005-04-01), Suissa et al.
patent: 7203476 (2007-04-01), Ruelke et al.
patent: 7409024 (2008-08-01), Ginesi et al.
patent: 2004/0114697 (2004-06-01), Young
patent: 2346777 (2000-08-01), None
patent: 2414609 (2005-11-01), None
patent: 2415846 (2006-01-01), None
GB Search Report dated Jul. 7, 2006.
PCT International Search Report dated Oct. 27, 2008.
PCT International Preliminary Report on Patentability dated Dec. 11, 2008.

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