IEEE 802.11bf Multistatic Sensing with Unsynchronized Receivers

Distinct from existing works on millimeter wave Wi-Fi sensing in a monostatic or bistatic setting, in this paper we present a complete framework for multistatic sensing with unsynchronized receivers using IEEE 802.11bf signals. Based on the channel estimates from the active sensing procedure, each receiver extracts the line-of-sight and the target-reflected paths, and reports the time-difference-of-arrivals to a central server, which localizes and potentially tracks the target. We simulate the system using the QD channel simulator and the ISAC-PLM software package from NIST, and present the measurement accuracy at each receiver and the localization accuracy at the central server. Numerical results show promising localization performance at reasonable signal-to-noise ratio (SNR) levels.