Subband Digital Predistortion for 6G Millimeter-Wave Systems

Overview

As an RF R&D Engineer at Télécom Paris (Palaiseau, France), I contributed to the Docte6G national research project in collaboration with NXP Semiconductors, targeting next-generation 6G wireless systems operating at millimeter-wave (mmW) frequencies.

Key Contributions

• Developed a subband digital predistortion (DPD) theoretical framework tailored for wideband mmW 6G signals, addressing the unique nonlinear distortion challenges at frequencies above 24 GHz.
• Designed and validated DPD algorithms through hardware measurement campaigns, bridging the gap between simulation-based models and real-world PA behavior.
• Advanced linearization strategies that account for frequency-dependent memory effects in mmW power amplifiers, improving adjacent channel leakage ratio (ACLR) and error vector magnitude (EVM) performance.

Tools & Technologies

MATLAB, Python, Keysight ADS, RF instrumentation (signal generators, spectrum analyzers, NVNA), NXP mmW PA testbeds.

Impact

This work contributes to the foundational RF signal processing layer required for future 6G deployments, where wideband operation at mmW bands demands highly linear and power-efficient transmitter architectures.