Quantized angle modulator

Details Quantized angle modulator Quantized angle modulator

1980-07-23

1981-07-14

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

332 23R, 455110, H03C 302

Patent

active

042789524

ABSTRACT:
A first stream of digits is converted to a second stream of alternating-current digits, each of the same amplitude and the same duration which may be different from the duration of the digits of the first stream, and which transmits at least the information in the first stream of digits at at least the same information rate. A number of alternating-current sources with different frequencies, the number at least as great as the greatest possible number of materially different groups of digits in the first stream, are connected one at a time to an output circuit in response to the first stream of digits to generate the second stream of alternating-current digits. The resultant wave may be limited at non-regenerative repeaters to remove amplitude noise, and may be regenerated in regenerative repeaters to remove substantially all noise and distortion.

REFERENCES:
patent: 4063196 (1977-12-01), Larson et al.
patent: 4179672 (1979-12-01), Voles
patent: 4205241 (1980-05-01), Fisher et al.
Tranmission Systems for Communications, Bell Telephone Laboratories, 1971, pp. 116-122, 139-145, 215-219, 426-430, 483-486, 553-578, 583, 589, 592, 594, 608, 626, 627, 646-651, 666-673.
Bell Laboratories Record, Aug. 1972, pp. 229-231.
Bell Laboratories Record, Sep. 1973, pp. 243.
Prigozy, Electronics, Apr. 19, 1969, p. 91.
Reference Data for Radio Engineers, H. W. Sams, 1969, pp. 2-11 to 2-18, 21-13, 21-14, 30-21, 30-22, 38-1 to 38-3.
Bennett, Pulse Code Modulation, London 1976, pp. 23-28.

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