Phase based vector modulator

Details Phase based vector modulator Phase based vector modulator

1990-09-25

1992-03-03

Grimm, Siegfried H.

Modulators

Frequency shift keying modulator or minimum shift keying...

332103, 332119, 332127, 332144, 332151, H03C 100, H03C 300

Patent

active

050936360

ABSTRACT:
Vector modulation is effected by summing output signals from two phase modulators. The lack of amplitude modulation on the signals when summed permits non-linear processing of the signals, such as PLL frequency translation. In one embodiment, the phase modulators comprise fractional-N phase locked loops modulated with digital data words. In another, the phase modulators comprise direct digital synthesizers.

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patent: 4970519 (1990-11-01), Minnis et al.
Casadevall, "The LINC Transmitter", RF Design, Feb. 1990, pp. 41-48.
DaSilva, "Synthesis of FM Signals by Phase Reconstruction in a Phase-Locked Loop", Hewlett-Packard, Spokane Division, May 23, 1984.

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