Optimized simultaneous audio and data transmission using QADM wi

Details Optimized simultaneous audio and data transmission using QADM wi Optimized simultaneous audio and data transmission using QADM wi

1996-08-19

1998-04-21

Cain, David C.

Cryptography

Cryptanalysis

380 46, H04K 100

Patent

active

057426791

ABSTRACT:
An subsystem processor for converting an input audio signal to complex audio samples for QADM processing by a modem for communication with a remote modem is disclosed. The audio process comprises a decorrelator for processing the input audio to generate a residual signal, an adaptive scaler for adaptively scaling the residual signal to generate a scaled residual signal, a randomizer for phase-randomizing the scaled residual signal to generate a complex signal with randomized phases, and a limiter for limiting the complex signal with randomized phases, such that the complex signal is transmitted by the modem to a remote modem.

REFERENCES:
patent: 3936828 (1976-02-01), Muesse et al.
patent: 4456862 (1984-06-01), Yueh
patent: 5172118 (1992-12-01), Peregrim et al.

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