High-Robustness and Low-Complexity Joint Estimation of TOAs and CFOs for Multiuser SIMO OFDM Systems

Liu, Yujie ORCID: 0000-0003-0437-7289, Zhu, Xu ORCID: 0000-0002-7371-4595, Lim, Eng Gee ORCID: 0000-0003-0199-7386, Jiang, Yufei, Huang, Yi ORCID: 0000-0001-7774-1024, Xu, Weiqiang and Lin, Hai (2018) High-Robustness and Low-Complexity Joint Estimation of TOAs and CFOs for Multiuser SIMO OFDM Systems. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 67 (8). pp. 7739-7743.

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Abstract

We propose the first joint estimation scheme of time of arrivals (TOAs) and carrier frequency offsets (CFOs) for multiuser single-input multiple-output orthogonal frequency-division multiplexing systems. By designing carefully preambles of K users and utilizing the properties of the channels and CFO vectors, a complex 2K -dimensional joint multi-TOA and multi-CFO estimation problem is divided into 2K low-complexity 1-D problems. The integer and fractional parts of each user's CFO are estimated in an integral and closed form. Simulation results show that the proposed scheme provides higher TOA and CFO estimation accuracy than the existing methods, while at much lower computational complexity. The achieved TOA estimation performance is robust against CFOs and close to the idea case with no CFOs at the receiver.

Item Type:	Article
Uncontrolled Keywords:	Time of arrival (TOA), carrier frequency offset (CFO), single-input multiple-output (SIMO), orthogonal frequency division multiplexing (OFDM)
Depositing User:	Symplectic Admin
Date Deposited:	05 Jun 2018 09:12
Last Modified:	16 Mar 2024 22:00
DOI:	10.1109/TVT.2018.2821152
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3022190