Phase modulating with odd and even finite power series of a modu

Details Phase modulating with odd and even finite power series of a modu Phase modulating with odd and even finite power series of a modu

1975-09-29

1976-12-07

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

325145, 332 23R, H03C 302

Patent

active

039965325

ABSTRACT:
Method and apparatus for producing a phase-modulated waveform having a high degree of linearity between the modulating signal and the phase of the modulated carrier signal. Two signals representing finite odd and even power series transformations of the modulating signal are produced and multiplied with two quadrature components of the input carrier signal, respectively. One of the multiplied signals is subtracted from the other and the resulting signal is hard-limited to produce a phase-modulated output signal. The means for producing the two signals representing the odd and even power series of the modulating signal includes means for varying the coefficients of the two power series. By means of an existing computer program, the coefficients of the two power series are selected such that there is an extremely high degree of linearity between the modulating signal and the phase of the modulated carrier signal.

REFERENCES:
patent: 3818378 (1974-06-01), Phillips

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