Polar loop transmission circuit

Details Polar loop transmission circuit Polar loop transmission circuit

2005-02-08

2005-02-08

Corsaro, Nick (Department: 2684)

Telecommunications

Transmitter

With feedback of modulated output signal

C370S205000, C370S347000, C455S108000

Reexamination Certificate

active

06853836

ABSTRACT:
A polar loop transmission circuit is proposed wherein a signal to be transmitted and a feedback signal are separated into their polar phase and amplitude components and the components are compared to one another for realizing a phase and amplitude modulation. An amplitude modulator controlled by an amplitude modulation signal is provided, whereby the amplitude modulator follows an oscillator and is preferably fashioned as a nonlinear amplifier that is operated in saturation. An amplifier attenuating the output signal of the amplitude modulator is provided in the feedback path. The present transmission architecture is suitable for future mobile radio telephone systems having a phase and amplitude modulation and are based on the known GSM standard, for example.

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