Wideband RF PA shown with Xilinx digital pre-distortion IP

May 26, 2016 // By Graham Prophet
RF semiconductor specialist Ampleon (Nijmegen, The Netherlands) has a demonstration wideband system solution that uses Xilinx’s Digital Pre-Distortion (DPD) IP with Xilinx All Programmable SoC and MPSoC technology.

DPD and power amplifier (PA) efficiency improvements are closely related, because PAs with higher efficiencies tend to be less linear and more difficult to pre-correct. Advanced pre-distortion systems are needed to recover the wanted linearity. The advent of wide-band and multiband systems poses additional challenges to the pre-distortion system, because of the increased signal bandwidth that needs to be processed. Ampleon develops solutions for amplifiers able to cope with ever-increasing signal bandwidth: Xilinx’s DPD solutions are applied to linearize them. Close cooperation is needed in order to optimize the full system, PA plus linearization, using dedicated algorithms and programmable hardware.


“Advanced digital pre-distortion algorithms are needed to linearize PAs for wide-band and multi-band applications to achieve desired performance while lowering CAPEX and OPEX,” said Harpinder Matharu, Senior Product Manager, Communications Business at Xilinx. “...[demonstrating] high power efficiency for wide signal bandwidth radio applications and an advanced digital pre-distortion solution, available on Xilinx 28nm Zynq SoC and UltraScale+ MPSoCs. This showcases linearizing Ampleon’s PAs consisting of an MMIC Driver BLM8G2327S-25PBG and a 2.5 to 2.7 GHz 300W LDMOS asymmetric Doherty power transistor.”


Ampleon; www.ampleon.com


Xilinx; www.xilinx.com