Title :
An improved energy demodulation algorithm using splines
Author :
Dimitriadis, Dimitrios ; Maragos, Petros
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Greece
Abstract :
A new algorithm is proposed for demodulating discrete-time AM-FM signals, which first interpolates the signals with smooth splines and then uses the continuous-time energy separation algorithm (ESA) based on the Teager-Kaiser energy operator. This spline-based ESA retains the excellent time resolution of the ESA based on discrete energy operators but performs better in the presence of noise. Further, its dependence on smooth splines allows some optimal trade-off between data fitting versus smoothing
Keywords :
amplitude modulation; demodulation; frequency modulation; interpolation; optimisation; signal resolution; smoothing methods; splines (mathematics); Teager-Kaiser energy operator; continuous-time energy separation algorithm; data fitting; discrete-time AM-FM signals; energy demodulation algorithm; noise performance; optimal trade-off; signal interpolation; smooth splines; smoothing; time resolution; Amplitude modulation; Demodulation; Energy resolution; Frequency estimation; Frequency modulation; Power engineering and energy; Signal processing; Signal resolution; Speech processing; Spline;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-7041-4
DOI :
10.1109/ICASSP.2001.940591
