Title :
A method of cepstral enhancement for detection and parameter estimation of echoes
Author :
Armstrong, B. ; Ahmed, N.
Author_Institution :
Dept. of EECE, New Mexico Univ., Albuquerque, NM, USA
Abstract :
Adaptive finite impulse response (FIR) and infinite impulse response (IIR) frequency estimation methods are utilized in a detection scheme to identify frequency in the log power spectrum. In addition, an adjustable window based on a Butterworth design is suggested for use in isolating the cosinusoidal frequency. The advantages and disadvantages of windowing are discussed. Also the problems associated with complex cepstrum processing are discussed as they relate to echo detection and delay estimation. Comparisons are made of the proposed processing methods using a standard broadband rectangular function with random noise added in addition to actual echoic data
Keywords :
adaptive filters; echo; parameter estimation; random noise; signal detection; signal processing; spectral analysis; Butterworth design; FIR filter; IIR filter; adaptive finite impulse response; adjustable window; broadband rectangular function; cosinusoidal frequency; delay estimation; echo detection; frequency estimation methods; log power spectrum; parameter estimation; processing methods; random noise; Acoustic reflection; Additive noise; Cepstral analysis; Cepstrum; Delay estimation; Optical reflection; Parameter estimation; Radar detection; Signal processing; Sonar;
Conference_Titel :
Signals, Systems and Computers, 1991. 1991 Conference Record of the Twenty-Fifth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-2470-1
DOI :
10.1109/ACSSC.1991.186433
