Multiple amplitude and phase shift keyed signal modulation metho

Details Multiple amplitude and phase shift keyed signal modulation metho Multiple amplitude and phase shift keyed signal modulation metho

1982-04-27

1985-01-22

LaRoche, Eugene R.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

332 17, 332 22, 332 23R, 332 9R, 375 42, 375 53, H03C 500, H04L 2720

Patent

active

044954778

ABSTRACT:
In a multi-phase modulation method in which digital words each having a word length of at least 3 bits control the generation of a modulated carrier in a manner such that each digital word value is associated with a particular amplitude and phase of the modulated carrier, and in which the modulated carrier is formed of a combination of three oscillating signals having identical frequencies, shifted in phase by 120.degree. relative to one another, and each having a selected amplitude, the digital words are associated with the oscillating signals in such a manner that a first group of digital words is represented only by modulated carrier phases which possess equal angular spacings in the 360.degree. phase plane and a plurality of further digital words is represented by a zero amplitude carrier formed by combining all three oscillating signals each having the identical selected amplitude or by suppressing all three oscillating signals.

REFERENCES:
patent: 3706945 (1972-12-01), Yanagidaira et al.
patent: 3805191 (1974-04-01), Kawai et al.
patent: 3845412 (1974-10-01), Rearwin et al.
patent: 3983485 (1976-09-01), Stuart
patent: 4404532 (1983-09-01), Welti
Miyauchi, K. et al., "New Technique for Generating and Detecting Multilevel Signal Formats" IEEE Transactions on Communications V.Com-24, No. 2, pp. 263-267 (Feb. 76).
Simon et al., "Hexagonal Multiple Phase-and-Amplitude-Shift-Keyed Signal Sets" IEEE Transactions on Communications, vol. COM-21, No. 10, 10/73, pp. 110-111.

Affiliated with

Also associated with

Rating

Multiple amplitude and phase shift keyed signal modulation metho does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple amplitude and phase shift keyed signal modulation metho, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple amplitude and phase shift keyed signal modulation metho will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-568753