Signal Detection for GSTFIM Systems with Carrier Frequency Offset

Tingyong Wu; Shiwen Fan; Chengliang Di; Jinwei Ji

doi:10.3390/s22072548

Sensors (Mar 2022)

Signal Detection for GSTFIM Systems with Carrier Frequency Offset

Tingyong Wu,
Shiwen Fan,
Chengliang Di,
Jinwei Ji

Affiliations

Tingyong Wu: The Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
Shiwen Fan: The Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
Chengliang Di: The 54th Research Institute of CETC, Shijiazhuang 050081, China
Jinwei Ji: The 54th Research Institute of CETC, Shijiazhuang 050081, China

DOI: https://doi.org/10.3390/s22072548
Journal volume & issue: Vol. 22, no. 7
p. 2548

Abstract

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Generalized space-time-frequency index modulation (GSTFIM) inherits the drawbacks of the conventional orthogonal frequency-division multiplex (OFDM), such as being sensitive to carrier frequency offset (CFO). For a robust design against this problem, in this contribution, a novel construction of a message passing (MP)-aided detector is developed for GSTFIM systems to combat the influence of CFO, while offering a flexible tradeoff between transmission performance and computational complexity. Through complexity analysis and simulation results, we demonstrate that, in the context of CFO, with a careful design, the developed MP detector is capable of approaching traditional GSTFIM with maximum likelihood (ML) detection, and of offering better performance at lower complexity compared to its minimum mean-square-error (MMSE)-aided counterpart.

Published in Sensors

ISSN: 1424-8220 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: http://www.mdpi.com/journal/sensors

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