TY - GEN
T1 - Asymptotically optimum tests for decentralized sequential testing in continuous time
AU - Fellouris, Georgios
AU - Moustakides, George V.
PY - 2008
Y1 - 2008
N2 - We propose an asymptotically optimum test for the problem of decentralized sequential hypothesis testing in continuous time, in the case where the sensors have full local memory and no feedback from the fusion center. According to our scheme, the sensors perform locally repeated SPRTs and communicate, asynchronously, their one-bit decisions to the fusion center. The fusion center in turn uses the received information to perform a centralized SPRT in order to make the final decision. The expected time for a decision of the proposed scheme differs from the optimum continuous-time centralized SPRT only by a constant. This fact suggests order-2 asymptotic optimality of our test as compared to existing schemes that are optimal of order-1. Moreover, simulation experiments reveal that the performance of our scheme is significantly better than that of the discrete-time centralized SPRT.
AB - We propose an asymptotically optimum test for the problem of decentralized sequential hypothesis testing in continuous time, in the case where the sensors have full local memory and no feedback from the fusion center. According to our scheme, the sensors perform locally repeated SPRTs and communicate, asynchronously, their one-bit decisions to the fusion center. The fusion center in turn uses the received information to perform a centralized SPRT in order to make the final decision. The expected time for a decision of the proposed scheme differs from the optimum continuous-time centralized SPRT only by a constant. This fact suggests order-2 asymptotic optimality of our test as compared to existing schemes that are optimal of order-1. Moreover, simulation experiments reveal that the performance of our scheme is significantly better than that of the discrete-time centralized SPRT.
KW - Decentralized
KW - SPRT
KW - Sequential testing
UR - http://www.scopus.com/inward/record.url?scp=56749122050&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=56749122050&partnerID=8YFLogxK
U2 - 10.1109/ICIF.2008.4632360
DO - 10.1109/ICIF.2008.4632360
M3 - Conference contribution
AN - SCOPUS:56749122050
SN - 9783000248832
T3 - Proceedings of the 11th International Conference on Information Fusion, FUSION 2008
BT - Proceedings of the 11th International Conference on Information Fusion, FUSION 2008
T2 - 11th International Conference on Information Fusion, FUSION 2008
Y2 - 30 June 2008 through 3 July 2008
ER -