CPC H04W 52/0229 (2013.01) [H04B 17/318 (2015.01); H04B 17/336 (2015.01); H04L 9/32 (2013.01); H04W 12/03 (2021.01); H04W 12/08 (2013.01); H04W 84/18 (2013.01)] | 18 Claims |
1. A wake-up radio system in a wireless sensor network, the wake-up radio comprising:
an analog front end configured to communicate with a matching network; wherein the matching network receives beacon signals from multiple channels simultaneously, wherein scanning consists of scanning in time rather than frequency, and wherein scanning comprises listening for best beacon signals comprising beacons with highest received signal strength indicator (RSSI);
an analog to digital converter coupled to the analog front end; and
a digital baseband coupled to the analog to digital converter, wherein the digital baseband outputs a fast wake-up signal, a secure wake-up signal and a clock signal, and wherein for a secure wakeup signal, a header is demodulated in a physical layer and a secure payload is passed through a cryptographic checksum before issuing a wakeup signal.
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