An analytical framework for coherent AirComp with PA nonlinearities is developed and a closed-form expression for the receiver mean-squared error (MSE) under a memoryless polynomial PA model is derived.
Abstract
Over-the-air computation (AirComp) enables efficient wireless data aggregation by exploiting the superposition of signals transmitted by multiple source nodes, but its performance is sensitive to hardware impairments such as power amplifier (PA) nonlinearity. In this paper, we develop an analytical framework for coherent AirComp with PA nonlinearities and derive a closed-form expression for the receiver mean-squared error (MSE) under a memoryless polynomial PA model. Our numerical results show that power control optimized under the conventional linear-PA assumption can exhibit rapidly increasing MSE as the transmit power budget increases, whereas incorporating PA nonlinearity into the power control design prevents this degradation and maintains low MSE over the considered power range.
Over-the-air computation (AirComp) has emerged as a promising technology for wireless data aggregation. However, its performance can be severely impaired by unfavorable channel conditions. To address this issue, we investigate AirComp aided by an active reconfigurable intelligent surface (RIS) with a sub-connected arch...
De-You Zhang, Ya-Ru Wang, Jia-Le Wang et al.· IEEE Communications Letters· 0 citations
This paper investigates type-based multiple access (TBMA) as a general framework for OAC, enabling the receiver to recover a histogram of the distributed observations and compute a broad class of functions without modifying the underlying communication scheme.
Marc Martinez-Gost, Ana I. Pérez-Neira· 0 citations
Over-the-air computation (AirComp) aggregates distributed data through the wireless multiple-access channel, but coherent implementations require channel state information (CSI), phase alignment, and power control, whereas non-coherent energy methods remain affected by fading. Signal superposition at the receive antenn...
Affine Frequency Division Multiplexing (AFDM) is a promising waveform for integrated sensing and communications (ISAC) due to its Doppler resilience. However, such waveforms exhibit a high peak-to-average power ratio (PAPR), and they require highly linear Power Amplifiers (PAs), which conflicts with ISAC requirements,...
Eya Gourar, Y. Medjahdi, L. Clavier et al.· 1 citation
Type-based multiple access (TBMA) is a digital over-the-air computation (OAC) scheme that exploits symbol collisions over the wireless multiple-access channel to construct a histogram of the transmitted data at the receiver. This paper addresses the optimal detection of the transmitted histogram in TBMA over an additiv...
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Digital function-oriented communication is presented, in which finite-alphabet symbol representations and receiver decisions are jointly designed so that multiple-access superposition encodes the desired function without recovering individual inputs.
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