Adaptive estimation method for unknown frequencies by variable sampling processing and its application

The authors propose a new adaptive method for the estimation of frequencies for the signals whose frequencies are known in advance only roughly, which consists in updating only the sampling frequency. In this paper, we investigate an adaptive method for estimation of unknown frequencies by means of...

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Bibliographic Details
Published in:Electronics & communications in Japan. Part 3, Fundamental electronic science Fundamental electronic science, 2001-05, Vol.84 (5), p.43-52
Main Authors: Noguchi, Kentaro, Tadokoro, Yoshiaki
Format: Article
Language:English
Subjects:
adaptive frequency estimation
DTMF signals
synchronous addition and subtraction processing
unknown frequency
variable sampling
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Summary:The authors propose a new adaptive method for the estimation of frequencies for the signals whose frequencies are known in advance only roughly, which consists in updating only the sampling frequency. In this paper, we investigate an adaptive method for estimation of unknown frequencies by means of parallel processing, based on an expansion of a previously proposed method. If the range of the frequencies to be estimated can be determined, several initial synchronous signals covering that range are set up. Then, each synchronous signal is adaptively changed according to the previously proposed algorithm, and the frequencies existing within this range are estimated. Using simulation, we have established performance characteristics of the proposed method by comparing it with conventional frequency estimation methods. Finally, we propose an application of this method to the detection of DTMF signals. © 2001 Scripta Technica, Electron Comm Jpn Pt 3, 84(5): 43–52, 2001
ISSN:1042-0967
1520-6440
DOI:10.1002/1520-6440(200105)84:5<43::AID-ECJC5>3.0.CO;2-#