Timing based LNA gain adjustment in an RF receiver to...

Details Timing based LNA gain adjustment in an RF receiver to... Timing based LNA gain adjustment in an RF receiver to...

2005-03-29

2005-03-29

Nguyen, Simon (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S234100, C455S234200, C455S239100, C455S245100, C455S249100, C375S345000

Reexamination Certificate

active

06873832

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: 5184349 (1993-02-01), Riordan
patent: 5331638 (1994-07-01), Honkasalo et al.
patent: 5339454 (1994-08-01), Kuo et al.
patent: 5493712 (1996-02-01), Ramesh et al.
patent: 5548594 (1996-08-01), Nakamura
patent: 5884152 (1999-03-01), Matsumoto
patent: 6430173 (2002-08-01), Posti et al.
patent: 6728524 (2004-04-01), Yamanaka et al.
patent: WO 0152429 (2000-01-01), None
patent: WO 01 52429 (2001-07-01), None

Affiliated with

Also associated with

Rating

Timing based LNA gain adjustment in an RF receiver to... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Timing based LNA gain adjustment in an RF receiver to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Timing based LNA gain adjustment in an RF receiver to... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3439519