Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2007-07-10
2007-07-10
Nguyen, Simon (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S234200, C455S240100, C455S250100, C375S345000
Reexamination Certificate
active
10968496
ABSTRACT:
A Radio Frequency (RF) receiver includes a low noise amplifier (LNA) and a mixer coupled to the output of the LNA. The gain of the LNA is adjusted to maximize signal-to-noise ratio of the mixer and to force the mixer to operate well within its linear region when an intermodulation interference component is present. The RF receiver includes a first received signal strength indicator (RSSI_A) coupled to the output of the mixer that measures the strength of the wideband signal at that point. A second received signal strength indicator (RSSI_B) couples after the BPF and measures the strength of the narrowband signal. The LNA gain is set based upon these signal strengths. LNA gain is determined during a guard period preceding an intended time slot of a current frame and during a guard period following an intended time slot of a prior frame. The lesser of these two LNA gains is used for the intended time slot of the current frame.
REFERENCES:
patent: 5222255 (1993-06-01), Kuo et al.
patent: 5331638 (1994-07-01), Honkasalo et al.
patent: 5339454 (1994-08-01), Kuo et al.
patent: 5422889 (1995-06-01), Sevenhans et al.
patent: 5513386 (1996-04-01), Ogino et al.
patent: 5722061 (1998-02-01), Hutchinson, IV et al.
patent: 5732341 (1998-03-01), Wheatley, III
patent: 5862465 (1999-01-01), Ou
patent: 5884152 (1999-03-01), Matsumoto
patent: 6052566 (2000-04-01), Abramsky et al.
patent: 6181201 (2001-01-01), Black
patent: 6324387 (2001-11-01), Kamgar et al.
patent: 6498926 (2002-12-01), Ciccarelli et al.
patent: 6654594 (2003-11-01), Hughes et al.
patent: 6728524 (2004-04-01), Yamanaka et al.
patent: 6859099 (2005-02-01), Akaiwa
patent: 6873832 (2005-03-01), Shi
patent: 2003/0157910 (2003-08-01), Bruckmann et al.
patent: 0 862 280 (1998-09-01), None
patent: 05-300039 (1993-11-01), None
patent: 11-340859 (1999-12-01), None
patent: 2001-203539 (2001-07-01), None
patent: WO 01/52429 (2001-07-01), None
“Impact of power variation on 3rd order passive intermodulation of coaxial RF-cables and their connectors” by Hartmut Gohdes; RFS kabelmetal, Division of kabelmetal electro.
“Improving Receiver Intercept point Using Selectivity” by MAXIM; www.maxim-ic.com/an749; May 17, 2001; pp. 1-9.
Broadcom Corporation
Garlick Bruce E.
Garlick & Harrison & Markison
Nguyen Simon
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