A 12.46µW Baseband Timing Circuitry for Synchronization and Duty-Cycling of Scalable Wireless Mesh Networks in IoT
Enkhbayasgalan Gantsog, Ivan Bukreyev, Frank Lane, Alyssa Apsel · 2018
This work presents baseband timing circuitry that enables scalable synchronization and aggressive duty-cycling of peer-to-peer IoT nodes for low-power wireless communication. The circuitry is compatible with commercial RF front ends and is insensitive to the phase and frequency offsets of the received signal due to the differential detector. An analog correlator enables low-latency detection of a synchronization packet, or syncword. The detected syncword is used to advance the phase of a nonlinear pulse-coupled oscillator, which drives the network to a synchronized state. The circuits consume 12.46 μW in 0.01 % duty-cycled mode while detecting a 63-bit syncword at 1.25 Mbps with BER = 10-3at SNR = 5 dB. Synchronization of three wireless nodes is demonstrated.