OpenDPD: An Open-Source End-to-End Learning Benchmarking Framework for Wideband Power Amplifier Modeling and Digital Pre-Distortion
CoRR(2024)
摘要
With the rise in communication capacity, deep neural networks (DNN) for
digital pre-distortion (DPD) to correct non-linearity in wideband power
amplifiers (PAs) have become prominent. Yet, there is a void in open-source and
measurement-setup-independent platforms for fast DPD exploration and objective
DPD model comparison. This paper presents an open-source framework, OpenDPD,
crafted in PyTorch, with an associated dataset for PA modeling and DPD
learning. We introduce a Dense Gated Recurrent Unit (DGRU)-DPD, trained via a
novel end-to-end learning architecture, outperforming previous DPD models on a
digital PA (DPA) in the new digital transmitter (DTX) architecture with
unconventional transfer characteristics compared to analog PAs. Measurements
show our DGRU-DPD achieves an ACPR of -44.69/-44.47 dBc and an EVM of -35.22 dB
for 200 MHz OFDM signals. OpenDPD code, datasets, and documentation are
publicly available at https://github.com/lab-emi/OpenDPD.
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