Title
Distributed learning of average belief over networks using sequential observations
Abstract
This paper addresses the problem of distributed learning of average belief with sequential observations, in which a network of n>1 agents aim to reach a consensus on the average value of their beliefs, by exchanging information only with their neighbors. Each agent has sequentially arriving samples of its belief in an online manner. The neighbor relationships among the n agents are described by a graph which is possibly time-varying, whose vertices correspond to agents and whose edges depict neighbor relationships. Two distributed online algorithms are introduced for undirected and directed graphs, which are both shown to converge to the average belief almost surely. Moreover, the sequences generated by both algorithms are shown to reach consensus with an O(1∕t) rate with high probability, where t is the number of iterations For undirected graphs, the corresponding algorithm is modified for the case with quantized communication and limited precision of the division operation. It is shown that the modified algorithm causes all n agents to either reach a quantized consensus or enter a small neighborhood around the average of their beliefs. Numerical simulations are then provided to corroborate the theoretical results.
Year
DOI
Venue
2018
10.1016/j.automatica.2020.108857
Automatica
DocType
Volume
Issue
Journal
115
C
ISSN
Citations 
PageRank 
0005-1098
1
0.35
References 
Authors
26
5
Name
Order
Citations
PageRank
Kaiqing Zhang14813.02
Liu Yang247343.62
Ji Liu314626.61
Mingyan Liu42569224.92
Tamer Basar53497402.11