Title :
Cumulant cepstrum of FM signals and high-resolution time delay estimation
Author :
Petropulu, Athina ; Nikias, Chrysostomos L. ; Proakis, John G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA
Abstract :
The authors address the problem in which time delays are closely-spaced, i.e. the distance between two consecutive time delays is significantly less than the duration of the autocorrelation of the FM signal. A high-resolution estimation method using the cumulant cepstra (polycepstra) of the received sensor data as the basic tool for reconstruction is introduced. The effectiveness of the method is demonstrated for different noise conditions and lengths of data. The results apply to sonar signal processing problems in which the acoustic FM signal is embedded in reverberation noise due to the presence of multipath and observation noise
Keywords :
acoustic signal processing; acoustic wave propagation; delays; frequency modulation; sonar; underwater sound; acoustic FM signal; autocorrelation; cumulant cepstrum; data lengths; high-resolution time delay estimation; multipath propagation; noise conditions; observation noise; polycepstra; received sensor data; reverberation noise; sonar signal processing; underwater communication channel; Acoustic noise; Acoustic propagation; Autocorrelation; Cepstrum; Delay effects; Delay estimation; Digital signal processing; Frequency estimation; Signal processing; Signal resolution;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.197189
