Machine learning (ML) has shown great promise in optimizing various aspects of the physical layer processing in wireless communication systems. In this paper, we use ML to learn jointly the transmit waveform and the frequency-domain receiver. In particular, we consider a scenario where the transmitter power amplifier is operating in a nonlinear manner, and ML is used to optimize the waveform to minimize the out-of-band emissions. The system also learns a constellation shape that facilitates pilotless detection by the simultaneously learned receiver. The simulation results show that such an end-to-end optimized system can communicate data more accurately and with less out-of-band emissions than conventional systems, thereby demonstrating the potential of ML in optimizing the air interface. To the best of our knowledge, there are no prior works considering the power amplifier induced emissions in an end-to-end learned system. These findings pave the way towards an ML-native air interface, which could be one of the building blocks of 6G.
On the Ambiguity Function of OFDM-based ISAC Signals Under Non-Ideal Power Amplifiers
IEMN, UMR CNRS 8520, University of Lille（北方微电子与自动化研究所，法国国家科学研究中心联合研究单位8520，里尔大学）；University of Paris-Est Créteil (UPEC), LISSI/TincNET（巴黎东-克雷泰伊大学（UPEC），信息与信息系统实验室/网络通信团队）
PAPR-Aware Waveform Design for Energy-Efficient MIMO-OFDM SWIPT
National Key Laboratory of Wireless Communications, University of Electronic Science and Technology of China（电子科技大学无线通信国家重点实验室）；School of Information Science and Technology, Southwest Jiaotong University（西南交通大学信息科学与技术学院）；Department of Electronic and Electrical Engineering, University College London（伦敦大学学院电子电气工程系）；Department of Electronic Engineering, Kyung Hee University（庆熙大学电子工程系）
On the Robustness of AFBM Sensing to Power Amplifier Nonlinearities
IMT Nord Europe, Institut Mines Télécom（欧洲高等矿业电信学院，法国电信研究学院）；Federal University of Technology – Paraná（巴拉那联邦技术大学）；Constructor University（康斯坦茨大学）；CEDRIC, Conservatoire National des Arts et Métiers（信息与通信技术研究中心，国立工艺博物馆）
On the Impossibility of Lossless Waveform Rank Reduction for Certain Redundant Arrays
Signal Processing Research Centre, Tampere University（坦佩雷大学信号处理研究中心）；Department of Information and Communications Engineering, Aalto University（阿尔托大学信息与通信工程系）；Electrical and Computer Engineering department, University of California San Diego（加州大学圣地亚哥分校电气与计算机工程系）
A 24-GHz CMOS Transformer-Based Three-Tline Series Doherty Power Amplifier Achieving 39% PAE
State Key Laboratory of Radio Frequency Heterogeneous Integration, Shanghai Jiao Tong University（上海交通大学射频异质集成国家重点实验室）；School of Microelectronics, Nanjing University of Science & Technology（南京理工大学微电子学院）
Distortion-Aware Integrated Sensing and Communication with Affine Filter Bank Modulation
IMT Nord Europe, Institut Mines Télécom（欧洲矿业电信学院）；Federal University of Technology - Paraná（巴拉那联邦技术大学）；Constructor University（构造大学）；Conservatoire National des Arts et Métiers - Paris（巴黎国立工艺博物馆）
