System for providing amplitude and phase modulation of line sign

Details System for providing amplitude and phase modulation of line sign System for providing amplitude and phase modulation of line sign

1997-12-18

2000-12-12

Pham, Chi H.

Pulse or digital communications

Receivers

Amplitude modulation

333149, H03D 124, H03H 900

Patent

active

061608564

ABSTRACT:
A system for amplitude and phase modulation combines digital and analog circuitry for converting digital data into a line signal. Amplitude and phase decoders decode the digital data to determine the amplitude and phase required to represent the current symbol of the digital data. A reference oscillator produces a carrier signal supplied to a digital delay line composed of a sequence of delay cells. Outputs of the delay cells are supplied to a phase selector controlled by the phase decoder to select the required phase of the carrier signal. The carrier signal having the selected phase is fed to a variable gain amplifier controlled by the amplitude decoder to produce the carrier signal with the required amplitude.

REFERENCES:
patent: 4019140 (1977-04-01), Swerdlow
patent: 5132572 (1992-07-01), Woo
patent: 5153527 (1992-10-01), Yaguchi
patent: 5220216 (1993-06-01), Woo
patent: 5227679 (1993-07-01), Woo
patent: 5264745 (1993-11-01), Woo
patent: 5349612 (1994-09-01), Guo et al.
patent: 5355092 (1994-10-01), Kosaka et al.
patent: 5363419 (1994-11-01), Ho
patent: 5367542 (1994-11-01), Guo
patent: 5400370 (1995-03-01), Guo
patent: 5452333 (1995-09-01), Guo et al.
patent: 5457719 (1995-10-01), Guo et al.
patent: 5787117 (1998-07-01), Ash

Affiliated with

Also associated with

Rating

System for providing amplitude and phase modulation of line sign does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for providing amplitude and phase modulation of line sign, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for providing amplitude and phase modulation of line sign will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-224477