Wi-Fi goes long range on new WiLo standard2024-10-07 14:32 by DanielaTags: Wi-Fi, WiLo, LoRa
Researchers in China have crossed WiFi and LoRa and called the result WiLo. They claim to get reliable connections over about half a kilometer. Typical WiFi runs 40 to 60 meters, barring any Pringle's cans or other exotic tricks. According to [Michelle Hampson] writing in IEEE Spectrum, the researchers manipulated Wi-Fi's OFDM multiplexing to emulate LoRa's chirp-spreading signal. The advantage is that existing WiFi hardware can use the protocol to increase range. While LoRa is known for being economical with power, this might not be the case with repurposed WiFi devices. The researchers plan to explore ways to make WiLo more energy efficient. There are also some efficiency issues. The WiFi header, trailer, and preamble can't contribute to the fake LoRa signal, so they are ignored by the LoRa receiver. We aren't sure, but we wondered if some or most WiFi cards are now based on SDR technology anyway. If you had the internal details of the SDR, it seems like you could simply reprogram the entire unit to do whatever protocol you wanted. Still, those details are probably hard to obtain. Read more -here-
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