Modulator with baseband to phase converter

Details Modulator with baseband to phase converter Modulator with baseband to phase converter

1995-11-02

1999-03-09

Ghebretinsae, Temesghen

Pulse or digital communications

Receivers

Angle modulation

375316, 455337, H04L 2722

Patent

active

058811125

ABSTRACT:
A phase demodulator (101) is used for sensing the phase.sub.-- angle of a phasor represented by the I and Q signals by first producing the analog I and Q signals in a direct conversion receiver (104). A phase generator (106) is used to approximate the angle of the phasor as represented by the I and Q signals by scaling and comparing the magnitudes of the I and Q signals and making decisions based on their relative magnitudes. The scaling includes successive alteration of the magnitude of the I and Q signals.sub.-- depending on their relative magnitudes. A DSP (108) is used to receive this bit stream representation (302) of the phasor and recover the information signal.

REFERENCES:
patent: 4653117 (1987-03-01), Heck
patent: 5095536 (1992-03-01), Loper
patent: 5249203 (1993-09-01), Loper

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