### Abstract

This paper presents a new algorithm for tracking the spectrum of non- stationary signals. In general there is no law relating frequency and time, and therefore, the frequency-time curves are usually approach dependent. The algorithm described here is an extension of the well-known Levinson model for estimating the spectra of stationary signals. The signal parameters are estimated by fitting the model with time-varying coefficients based on an exponential forgetting factor that is introduced to the autocorrelation function. The first operation is the excitation with the input sequence y(n), n = 0, 1, 2, ..., N, to produce a scalar output, then time-updating by incrementing the previous value with a scalar. To demonstrate the effectiveness of the algorithm, some numerical examples are considered: chirp signal in white noise, two sinusoids, and speech signals.

Original language | English (US) |
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Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |

Publisher | Publ by Int Soc for Optical Engineering |

Pages | 12-22 |

Number of pages | 11 |

ISBN (Print) | 0819405906 |

State | Published - Dec 1 1991 |

Event | Signal and Data Processing of Small Targets 1991 - Orlando, FL, USA Duration: Apr 1 1991 → Apr 3 1991 |

### Publication series

Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Volume | 1481 |

ISSN (Print) | 0277-786X |

### Other

Other | Signal and Data Processing of Small Targets 1991 |
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City | Orlando, FL, USA |

Period | 4/1/91 → 4/3/91 |

### All Science Journal Classification (ASJC) codes

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering

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## Cite this

*Proceedings of SPIE - The International Society for Optical Engineering*(pp. 12-22). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1481). Publ by Int Soc for Optical Engineering.