Envelope limiting for polar modulators

Details Envelope limiting for polar modulators Envelope limiting for polar modulators

2006-10-03

2008-08-12

Vo, Nguyen (Department: 2618)

Telecommunications

Transmitter

Amplitude modulation

C455S110000, C455S127200, C332S145000

Reexamination Certificate

active

07412213

ABSTRACT:
Envelope limiting for a polar modulator. A system is provided that intelligently compresses the amplitude modulation in a polar modulator so that it can be implemented with a single-stage variable gain amplifier. Limiting the amplitude modulation range on the low side prevents collapse of the transmit signal's time-varying envelope and eases circuit implementation. Limiting the amplitude modulation range on the high side reduces the peak-to-average ratio of the waveform and thereby improves the efficiency of the radio transmitter.

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