Method and apparatus using first and second variable gain contro

Details Method and apparatus using first and second variable gain contro Method and apparatus using first and second variable gain contro

1997-09-19

2000-03-28

Urban, Edward F.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

4552411, 4552451, H04Q 720

Patent

active

060442530

ABSTRACT:
A radio apparatus includes a first variable-gain circuit, a second variable-gain circuit, and a demodulator, wherein a band-pass filter is provided between the first and second variable-gain circuits and the demodulator inputs an output of the second variable-gain circuit. An error occurrence probability is detected from an output of the demodulator and a signal level is detected from the output of the second variable-gain circuit. A received signal strength is estimated from the signal level of the output of the second variable-gain circuit using an aggregate gain from the first variable-gain circuit to the second variable-gain circuit, and then the respective first and second gains of the first and second variable-gain circuits are changed in opposite directions depending on the error occurrence probability and the estimated received signal strength.

REFERENCES:
patent: 4380824 (1983-04-01), Inoue
patent: 5448774 (1995-09-01), Yokozaki et al.
patent: 5732342 (1998-03-01), Roth et al.
patent: 5734974 (1998-03-01), Callaway, Jr. et al.
patent: 5758271 (1998-05-01), Rich et al.
patent: 5809408 (1998-09-01), Fujumoto et al.
patent: 5867777 (1999-02-01), Yamaji et al.
Japanese Office Action issued Mar. 16, 1999 in corresponding Japanese Application.
English translation of selected portions of Mar. 16, 1999 Japanese Office Action.

Affiliated with

Also associated with

Rating

Method and apparatus using first and second variable gain contro does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus using first and second variable gain contro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus using first and second variable gain contro will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1334028