Power Allocation for OTFS-based AirComp System with Robust Precoding

Dongkai Zhou*, Siqiang Wang, Jing Guo, Zhong Zheng, Weihao Wang, Fei Zesong, Xinyi Wang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

In this work, we consider a high-mobility AirComp scenario, where orthogonal time frequency space (OTFS) modulation is employed to eliminate the effects of high-mobility channels. Specifically, firstly, a two-stage transmission scheme is developed for the considered system. The estimated channel in the first stage is used to design the minimum mean square error precoder utilized for data transmission in the second stage for the current frame. To further enhance the computation accuracy, the estimated channel is used for the power allocation between the pilot symbol and data symbols for the next frame. Therein, we derive the normalized mean square error (NMSE) by taking into account the imperfect channel estimation and then find the optimal power allocation which minimizes the computation NMSE under the total power constraint via the interior point method. The simulation results show that, compared to the benchmark schemes (i.e., the non-robust precoder and the robust precoder without power allocation), the proposed scheme can effectively improve the computation accuracy of the AirComp system.

Original languageEnglish
Title of host publication22nd International Symposium on Communications and Information Technologies, ISCIT 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages19-24
Number of pages6
ISBN (Electronic)9781665457316
DOIs
Publication statusPublished - 2023
Event22nd International Symposium on Communications and Information Technologies, ISCIT 2023 - Sydney, Australia
Duration: 16 Oct 202318 Oct 2023

Publication series

Name22nd International Symposium on Communications and Information Technologies, ISCIT 2023

Conference

Conference22nd International Symposium on Communications and Information Technologies, ISCIT 2023
Country/TerritoryAustralia
CitySydney
Period16/10/2318/10/23

Keywords

  • Over-the-air computation
  • imperfect channel estimation
  • orthogonal time frequency space
  • power allocation

Fingerprint

Dive into the research topics of 'Power Allocation for OTFS-based AirComp System with Robust Precoding'. Together they form a unique fingerprint.

Cite this

Zhou, D., Wang, S., Guo, J., Zheng, Z., Wang, W., Zesong, F., & Wang, X. (2023). Power Allocation for OTFS-based AirComp System with Robust Precoding. In 22nd International Symposium on Communications and Information Technologies, ISCIT 2023 (pp. 19-24). (22nd International Symposium on Communications and Information Technologies, ISCIT 2023). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISCIT57293.2023.10376117