Push-Sum Protocol Based Frequency and Phase Synchronization in Distributed Phased Arrays
Mohammed Rashid, Jeffrey A. Nanzer · 2022 IEEE International Symposium on Phased Array Systems & Technology (PAST) · 2022
In this paper, we consider the problem of joint frequency and phase synchronization of the nodes in a distributed phased array, when the communication links between the nodes are unidirectional. We assume a signal model for each node wherein oscillator frequency and phase drifts and phase jitter are included. Furthermore, we suppose that the nodes iteratively share their updated frequencies and phases via a local broadcast of their signals to reach a consensus, and thus the estimation errors are also included in the signal model. A push-sum protocol based frequency and phase consensus (PsFPC) algorithm is proposed for the array synchronization. Simulation results are included where it is shown that the performance of PsFPC improves with an increase in the number of nodes in the array, the connectivity between the nodes, and the signal to noise ratio of the received signals.