Patent ID: 7515652
Filing Date: 2009-04-07
Classification: H04L

Abstract:
1. A polar radio frequency (RF) transmitter within a radio transceiver for producing Phase Shift Keying (PSK) and Gaussian Minimum Shift Keying (GMSK) modulated communication signals, comprising: a baseband processor for producing transmission (TX) data and a TX control signal; a digital modulator that receives the TX data, that digitally modulates the TX data to produce one of a PSK and GMSK symbol based upon the TX control signal, wherein the digital modulator further includes: first and second Digital-to-Analog converters (DACs) for converting the envelope signal and the phase signal, respectively, from digital signals to analog signals to produce analog envelope signal and analog phase signal; first and second low pass filters for filtering the analog envelope signal and the analog phase signal, respectively; translational loop operably coupled to receive the analog phase signal to up-convert the analog phase signal from an IF frequency to an RF frequency; and a power amplifier for producing a modulated RF signal based on the RF frequency analog phase signal and the analog envelope signal.