Core Concepts
Investigating an OTFS-based AirComp system with robust precoding design for high-mobility communications.
Abstract
The content discusses the development of an OTFS-based AirComp system with robust precoding design for high-mobility communications. It explores the transmission framework, channel estimation, and precoding design to minimize mean square error. Simulation results demonstrate the effectiveness of the proposed scheme, especially in scenarios with large channel estimation errors.
Introduction to AirComp: Discusses the concept of over-the-air computation and its benefits.
System Model: Describes the network model and the proposed OTFS-based transmission framework.
Robust Precoding Design: Details the robust MMSE precoding design for OTFS and the channel estimation process.
Simulation Results: Evaluates the performance of the proposed scheme through simulation results.
Conclusions: Summarizes the findings and suggests future research directions.
Stats
"The simulation parameters are set as follows: the number of Doppler bins N = 64, the number of delay bins M = 64, the number of sensors Q = 6, the number of independent paths between each sensor and the AP P = 3."
"The pilot signal-to-noise ratio (SNR) for channel estimation is set to x2oσ2w = 30 dB."
"The delay taps and Doppler taps of each path are set to a random integer in [0, lmax] and [−kmax, kmax], respectively, where lmax = 4 and kmax = 2."
Quotes
"The proposed robust precoding scheme can effectively reduce the computation MSE, especially in the presence of large channel estimation errors."
"A suitable power allocation can also improve the computation accuracy."