Decentralized sequential test with data fusion

M. M. Al-Ibrahim, Pramod Kumar Varshney

Research output: Chapter in Book/Entry/PoemConference contribution

2 Scopus citations


The authors generalize the sequential probability ratio test (SPRT) of A. Wald (Sequential Analysis, Wiley, New York, 1947) to a distributed system. In particular, the authors consider a network of two detectors which are connected in parallel. Each local detector performs an SPRT based on its own observations and communicates its local decision to the global decision-maker. The global decision-maker combines the local decisions according to a predetermined fusion rule, and decides either to terminate the overall test and accept one of the two hypotheses or to continue. The global error probabilities are shown to be functions of the local error probabilities and the fusion rule. The global test length is formulated in terms of the local test lengths, and the average global test length is derived. An example is presented for the case of two identical local detectors. The results obtained show clearly that for the same level of performance, the proposed scheme has a shorter average decision time than the single-detector scheme.

Original languageEnglish (US)
Title of host publicationProc 1989 Am Control Conf
PublisherIEEE Computer Society
Number of pages5
StatePublished - 1989
EventProceedings of the 1989 American Control Conference - Pittsburgh, PA, USA
Duration: Jun 21 1989Jun 23 1989


OtherProceedings of the 1989 American Control Conference
CityPittsburgh, PA, USA

ASJC Scopus subject areas

  • General Engineering


Dive into the research topics of 'Decentralized sequential test with data fusion'. Together they form a unique fingerprint.

Cite this