Adaptive delta-modulation system

Details Adaptive delta-modulation system Adaptive delta-modulation system

1977-12-08

1980-07-29

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

332 11D, 375 30, H03K 1322

Patent

active

042153115

ABSTRACT:
A data waveform modulates a carrier to produce a data-waveform-modulated input signal v, which is applied to the input of a delta-modulation transmitter of controllable quantization-step size. The delta-modulated output signal d of the transmitter is fed through a shift register, to the individual stages of which the inputs of a coincidence gate are connected. The output signal of the coincidence gate is transmitted through a narrowband filter tuned to a frequency f.sub.s equal to the symbol transmission rate of the data-waveform-modulated input signal v. The narrowband-filter output signal is utilized to control quantization step size.

REFERENCES:
patent: 3414818 (1968-12-01), Reidel
patent: 3555423 (1971-01-01), Weston
patent: 3806806 (1974-04-01), Brolin
patent: 3896399 (1975-07-01), McDonald
patent: 3927372 (1975-12-01), Zschunke
patent: 4123709 (1978-10-01), Dodds

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