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.”