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• W4286655640 abstract "In the design of low-power long-range (LoRa) modulation systems in underwater Internet of Things (IoT) applications, multipath and noise in underwater acoustic (UWA) channels need to be considered. Commonly used LoRa modulation technologies, such as chirp-MFSK and chirp-MCSK, perform data modulation in a single dimension, and cannot provide reliable anti-multipath and anti-noise performance at the same time. This article proposes a two-dimensional modulation method chirp-MFCSK for the LoRa system. This method applies the <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$M_{2}$ </tex-math></inline-formula> -ary chirp-MCSK subsystem in the <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$M_{1}$ </tex-math></inline-formula> subbands of the FSK dimension. In specific UWA channels, the chirp-MFCSK modulation obtains a larger processing gain under the premise of suppressing the influence of multipath effects by flexibly adjusting the orders of the two dimensions. Simulation results and field experimental data show that in different UWA channels, the bit error rate performance of the optimal-ordered chirp-MFCSK modulation is several orders of magnitude better than that of the single-dimensional modulation methods." @default.
• W4286655640 created "2022-07-23" @default.
• W4286655640 creator A5008587352 @default.
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• W4286655640 date "2022-12-01" @default.
• W4286655640 modified "2023-10-15" @default.
• W4286655640 title "A Two-Dimensional Chirp-MFCSK Modulation Method for Underwater LoRa System" @default.
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• W4286655640 doi "https://doi.org/10.1109/jiot.2022.3188755" @default.
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