Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2002-11-25
2009-08-04
Edouard, Patrick N. (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S013400, C455S024000, C455S193100, C455S194200, C455S226100, C455S226200, C455S227000
Reexamination Certificate
active
07570946
ABSTRACT:
The invention relates to a method for determining the strength of a signal (18) at the input of a tuner (1a.) In this, the frequency-dependent amplification characteristic for the tuner is measured and stored in a memory assigned to the tuner. With the help of this characteristic the frequency-dependent variation of the amplification can be compensated during tuner operation, in order that the input signal strength can be deduced more precisely. For a tuner with automatic gain control (AGC), the frequency dependence of the AGC can also be recorded and stored in the memory by representative characteristics. The consideration of the AGC characteristics results in a further improvement to the precision of estimation of the input signal strength.
REFERENCES:
patent: 4733301 (1988-03-01), Wright, Jr.
patent: 5469115 (1995-11-01), Peterzell et al.
patent: 6169428 (2001-01-01), Mader
patent: 6650375 (2003-11-01), Maeda
patent: 6782335 (2004-08-01), Lynaugh et al.
Edouard Patrick N.
Lee Justin Y
NXP B.V.
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