utilizes envelope A and phase O components to represent the base-band symbols instead of the conventional I/Q format.
venture business credited for the development of polar modulation
techniques for use in wireless transmitter applications.
It said the closed-loop polar modulation
transmitter design used, helps reduce complexity of design and offers an improvement on the open-loop polar designs.
Combined with size reduction and an increase in overall performance, the RF3178 is designed to support polar modulation
in combination with the POLARIS 2 Radio Module solution.
This generation includes the quad-band RF3158 (GSM/GPRS/EDGE), optimized for linear EDGE using either direct I & Q modulators or small signal polar modulation
, and the quad-band RF3166 (GSM/GPRS), optimized for GSM/GPRS Class 12.
This PA represents greater than 30 percent size reduction and is optimized for linear EDGE using either direct I & Q modulators or small-signal polar modulation
. The RF3158 incorporates battery voltage tracking circuitry, which automatically measures battery voltage and adjusts ramp voltage, thereby preventing the power control loop from reaching saturation during low voltage battery conditions.