Description of the HaLow Wi-Fi protocol physical layer
Wi-Fi HaLow - An 802.11 standard for the IoT

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TE7382 V1 Article

Description of the HaLow Wi-Fi protocol physical layer
Wi-Fi HaLow - An 802.11 standard for the IoT

Authors : Sébastien MAUDET, Guillaume ANDRIEUX

Publication date: September 10, 2025 | Lire en français

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2. Description of the HaLow Wi-Fi protocol physical layer

2.1 OFDM transmission and modulation principle

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2.1.1 Frequency bands used

802.11ah transmissions are carried out in frequency bands below 1 GHz, to increase transmission range. Figure 2 shows the frequency bands authorized in different regions of the world.

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