Multiple phase modulator for N sets of digital data

Details Multiple phase modulator for N sets of digital data Multiple phase modulator for N sets of digital data

1982-05-04

1984-10-23

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

332 21, 332 22, 340347DD, 375 53, 375 54, 375 67, H03K 706, H04L 2720

Patent

active

044790996

ABSTRACT:
A 2.sup.N -phase phase modulator is formed from a plurality of series-connected 2-phase phase modulators. Each of the 2-phase phase modulators includes an Exclusive OR gate receiving at one input terminal one of a plurality of digital data sets. The first phase modulator receives a carrier signal at its other input terminal, and all subsequent phase modulators receive an output from a previous phase modulator through a 1/2 frequency divider.

REFERENCES:
patent: 3970946 (1976-07-01), Matsuo
patent: 4153814 (1979-05-01), Burgert
patent: 4352192 (1982-09-01), Perez et al.
patent: 4417219 (1983-11-01), Brossard et al.
Miyauchi, K. et al., "New Technique for Generating and Detecting Multilevel Signal Formate", IEEE Transactions on Communications, vol. COM-24, No. 2, (Feb. 1976), pp. 263-267.

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