Baseband demodulator for polar or rectangular modulated signal i

Details Baseband demodulator for polar or rectangular modulated signal i Baseband demodulator for polar or rectangular modulated signal i

1995-12-06

1998-10-27

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375324, 375345, 4552451, H04B 169, H04B 116, H04L 2700

Patent

active

058286926

ABSTRACT:
A cordless telephone system connectable to the public switched telephone network having a base station and one or more handsets communicating with the base station by an RF link utilizing a DBPSK I and Q demodulator with a digital AGC loop. When R .angle..theta. is being received instead of I and Q data, the phase information (.angle..theta.) is connected to the I input of the DBPSK demodulator. The amplitude information (R) and the output of the digital AGC logic are applied as differential inputs to the Q input of the DBPSK demodulator. The I input to the AGC logic is set to zero. The Q input to the AGC logic is supplied with the R data. The AGC servo loop with the differential Q inputs to the DBPSK demodulator creates a high resolution A/D converter for R. The theta information is used to demodulate the incoming bipolar data, which may be either MSK or FSK, if a limiter-discriminator or other FM demodulator is used.

REFERENCES:
patent: 4481640 (1984-11-01), Chow et al.
patent: 4703282 (1987-10-01), Yoshida
patent: 4724435 (1988-02-01), Moses et al.
patent: 4804938 (1989-02-01), Rouse et al.
patent: 4972430 (1990-11-01), Cantwell
patent: 5042050 (1991-08-01), Owen
patent: 5077753 (1991-12-01), Grau, Jr. et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5150377 (1992-09-01), Vannucci
patent: 5280472 (1994-01-01), Gilhousen
patent: 5309474 (1994-05-01), Gilhousen et al.
patent: 5351270 (1994-09-01), Graham et al.
patent: 5375140 (1994-12-01), Bustamante et al.
patent: 5416797 (1995-05-01), Gilhousen et al.
patent: 5579319 (1996-11-01), Daniel
patent: 5598438 (1997-01-01), Lepping

Affiliated with

Also associated with

Rating

Baseband demodulator for polar or rectangular modulated signal i does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Baseband demodulator for polar or rectangular modulated signal i, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Baseband demodulator for polar or rectangular modulated signal i will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1619962