Double side band-quadrature carrier modulation signal structures

Details Double side band-quadrature carrier modulation signal structures Double side band-quadrature carrier modulation signal structures

1979-08-31

1981-06-02

Robinson, Thomas A.

Pulse or digital communications

Repeaters

Testing

375 53, H04L 300

Patent

active

042715270

ABSTRACT:
An improved method is provided for the complex plane mapping of the signal structure constellation for double side band quadrature carrier modulation. All points are mapped in an N.times.N constellation having 90.degree. symmetry about the origin. All points in excess of 2.sup.M and any point appearing at origin are omitted. Any point, in each quadrant further spaced from the origin than any other point in that quadrant are relocated. "N" and "M" are integers.

REFERENCES:
patent: 3887768 (1975-06-01), Forney, Jr. et al.
patent: 3983485 (1976-09-01), Stuart
patent: 4135057 (1979-01-01), Bayless, Sr. et al.

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