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On a class of unsupervised estimation problems

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1 Author(s)

The unsupervised estimation problem has received considerable attention during the last three years. The problem usually considered, however, is only one of a class of unsupervised estimation problems. In this paper, a "mixture approach" defined previously is used to define this class of unsupervised estimation problems, and state precisely the a priori knowledge used to define each problem. After using available a priori knowledge to construct precisely the mixture appropriate to the unsupervised problem, the parameters characterizing this particular unsupervised problem can be estimated, or a Bayes minimum conditional risk receiver can be constructed. The class of unsupervised estimation problems includes the following cases: unknown number of pattern classes, dependent observation vectors, nonstationary class probabilities, more than one vector observation taken with a single class active, lack of synchronization, and unsupervised learning control and communications.

Published in:

Information Theory, IEEE Transactions on  (Volume:14 ,  Issue: 3 )

Date of Publication:

May 1968

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