Nondestructive firmness measurement of differently shaped pears with a dual-frequency index based on acoustic vibration
Sign Up to like & getrecommendations! Published in 2018 at "Postharvest Biology and Technology"
DOI: 10.1016/j.postharvbio.2017.12.002
Abstract: Abstract An acoustic setup was developed to simultaneously detect the resonant frequencies f1 from equator and f2 from calyx shoulder of pear (Pyrus bretschneideri Rehd.). A proposed index based on these two frequencies was used… read more here.
Keywords: dual frequency; index; index based; frequency ... See more keywords
Frequency Index Modulation for Low Complexity Low Energy Communication Networks
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Access"
DOI: 10.1109/access.2017.2713721
Abstract: In this paper, we propose a low-complexity multi-user communication system based on frequency index modulation that suits Internet of Things applications. This system aims to reduce the transmitted energy and the peak-to-average-power ratio (PAPR) of… read more here.
Keywords: tex math; complexity; frequency index; inline formula ... See more keywords
Generalized Quadrature Space-Frequency Index Modulation System With Low-Complexity Detection
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Systems Journal"
DOI: 10.1109/jsyst.2022.3146146
Abstract: In this article, we propose a generalized quadrature space-frequency index modulation (GQSFIM) system that maps the information bits to the subcarrier activation pattern (SAP), the two antenna activation patterns (AAPs), and the modulated symbols. Specifically,… read more here.
Keywords: system; space frequency; detection; index modulation ... See more keywords
Priori-Aided Detection for Generalized Space-and-Frequency Index Modulation Systems With Multi-Carrier Frequency Offset
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Vehicular Technology"
DOI: 10.1109/tvt.2019.2937674
Abstract: In this paper, two priori-aided detectors are proposed for generalized space-and-frequency index modulation (GSFIM) systems with the objective of mitigating the effect of the multi-carrier frequency offset (CFO). Specifically, based on the priori information, the… read more here.
Keywords: space frequency; frequency; generalized space; frequency index ... See more keywords
Robust single frequency index-patterned laser design using a Fourier design method.
Sign Up to like & getrecommendations! Published in 2023 at "Optics express"
DOI: 10.1364/oe.485879
Abstract: We use a Fourier-transform based method to investigate the magnitude and robustness of mode selectivity in as-cleaved discrete-mode semiconductor lasers, where a small number of refractive index perturbations are introduced into a Fabry-Pérot laser cavity.… read more here.
Keywords: index; single frequency; robust single; design ... See more keywords