System and method of transmitting a complex waveform over a comm

Details System and method of transmitting a complex waveform over a comm System and method of transmitting a complex waveform over a comm

1988-09-12

1990-03-06

Orsino, Joseph A.

Multiplex communications

Wide area network

Packet switching

370 70, 455 72, H04J 1500

Patent

active

049072170

ABSTRACT:
Complex waveforms may be transmitted using Lincompex techniques by frequency shifting either the complex waveform, its envelope, or both, in order to ensure that the compressed complex waveform and the envelope signal are transmitted without any substantial overlap therebetween utilizing Lincompex techniques. Overlap between the compressed waveform and envelope prevents the proper demodulation of the complex waveform from the signal transmitted. Accordingly, the frequency shifting techniques utilized in the present application allow Lincompex techniques to be utilized with complex waveforms having both a large bandwidth and a large envelope bandwidth, for example, the waveforms generated by parallel tone or multi-tone digital data.

REFERENCES:
patent: 3794919 (1974-02-01), Villeret et al.
patent: 4044205 (1977-08-01), Mullarkey
patent: 4047108 (1977-09-01), Bijker et al.
patent: 4271499 (1981-06-01), Leveque
patent: 4490691 (1984-12-01), Dolby

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