Communication of a voice signal via continuous quadrature amplit

Details Communication of a voice signal via continuous quadrature amplit Communication of a voice signal via continuous quadrature amplit

1989-01-06

1992-01-14

Safourek, Bendict V.

Pulse or digital communications

Repeaters

Testing

332103, 332115, 375 13, 375 39, 455 60, 455 93, H04L 2734

Patent

active

050816470

ABSTRACT:
A method and apparatus for communicating a voice conversation over a single telephone channel using continuously variable level quadrature amplitude modulation establishes and maintains two totally independent communication paths, each near perfect in amplitude and phase with respect to frequency over a bandwidth suitable for communication of continuously variable amplitude pulses. These pulses may be representations of any suitable bandlimited analog signal. The method establishes almost flawless QAM channels (real, imaginary), then allows switching to continuously variable amplitude analog transmissions.

REFERENCES:
patent: 3795865 (1974-03-01), Armstrong
patent: 4028626 (1977-06-01), Motley et al.
patent: 4398062 (1983-08-01), McRae et al.

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