Telecommunications – Receiver or analog modulated signal frequency converter – Plural receivers
Reexamination Certificate
2006-02-07
2006-02-07
Urban, Edward F. (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
Plural receivers
C455S234100, C455S245100
Reexamination Certificate
active
06996383
ABSTRACT:
An automatic gain control (AGC) system (100) for a controlled gain receiver (1101) includes a magnitude generator (160) and a gain corrector (170). The magnitude generator (160) generates a binary voltage squared signal (165) having a binary value that is directly proportional to a recovered signal power of an intercepted signal (113). The gain corrector (170) determines an adjustment of a gain control value (195) as a multiple of increments that are approximately 3 decibel (dB), by shifting (475, 445) a reference threshold by one or more bits and comparing (485, 455) the shifted reference threshold to the binary voltage squared signal. An initial setting of a state of a step attenuator (114) during a track mode (172) is determined during a warm up mode (171) by comparing the binary voltage squared signal (165) to two different thresholds (245, 255). A filter (162) accommodates a variety of bandwidths and symbol rates by settings of an accumulator (505) and scaler (510) that are included in the filter (162). A received signal strength indicator function (182) of the controlled gain receiver (1101) generates a low resolution or high resolution RSSI signal (183), depending on the mode. The value of the low resolution RSSI signal (183) is directly proportional to the power of the intercepted signal (113).
REFERENCES:
patent: 4710772 (1987-12-01), Cantwell et al.
patent: 5945852 (1999-08-01), Kosiec
patent: 6504420 (2003-01-01), Vorenkamp et al.
Hughes James David
Oakley John Richard
Powell, II Clinton C
Chen Sylvia
Karpinia Randi L.
Motorola Inc.
Nguyen Thuan
Urban Edward F.
LandOfFree
Digitized automatic gain control system and methods for a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digitized automatic gain control system and methods for a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digitized automatic gain control system and methods for a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3703592