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  • Research Article
  • Open Access

Adaptive Peak Frequency Estimation Using a Database of PARCOR Coefficients

EURASIP Journal on Advances in Signal Processing20052005:219856

  • Received: 10 March 2004
  • Published:


This paper presents an adaptive peak frequency estimation method using a database that stores PARCOR coefficients as key attributes and the corresponding peak frequencies as nonkey attributes. The least-square lattice algorithm is used to recursively estimate the PARCOR coefficients to adapt to changing circumstances. The nearest neighbor to the current PARCOR coefficient is retrieved from the database, and the corresponding peak frequency is regarded as the estimation. A simultaneous execution of database construction and peak estimation with database update is performed to accelerate the processing time and to improve the estimation accuracy.

Keywords and phrases:

  • peak frequency
  • database retrieval
  • AR spectrum
  • PARCOR coefficient
  • adaptive estimation

Authors’ Affiliations

Department of Communications Engineering, Graduate School of Engineering, Osaka University, Suita 565-0871, Japan
Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan


© Watanabe and Iiguni 2005