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Asymptotically efficient parameter estimation using quantized output observations
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DOI：10.1016/j.automatica.2006.12.030.png)
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摘要
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This paper studies identification of systems in which only quantized output observations are available. An identification algorithm for system gains is introduced that employs empirical measures from multiple sensor thresholds and optimizes their convex combinations. Strong convergence of the algorithm is first derived. The algorithm is then extended to a scenario of system identification with communication constraints, in which the sensor output is transmitted through a noisy communication channel and observed after transmission. The main results of this paper demonstrate that these algorithms achieve the Cramer-Rao lower bounds asymptotically, and hence are asymptotically efficient algorithms. Furthermore, under some mild regularity conditions, these optimal algorithms achieve error bounds that approach optimal error bounds of linear sensors when the number of thresholds becomes large. These results are further extended to finite impulse response and rational transfer function models when the inputs are designed to be periodic and full rank. (c) 2007 Elsevier Ltd. All rights reserved.
Keyword:
system identification
Cramer-Rao bound
efficient estimator
quantized observation
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期刊
IF:
5.9
论文数:
1.2W
被引数:
5.2W
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