Title :
Phase modulation of acoustic transducers
Author :
Yedlin, Matthew J. ; Majer, Ernie L.
Author_Institution :
Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada
Abstract :
A comparison of phase modulation and frequency modulation as applied to simple acoustic transducers is presented. We choose the complementary Barker code as the phase modulation code. To obtain optimal results an impulse response deconvolution is required. The final envelopes of the crosscorrelation of the reference signals and the recorded signals demonstrate the usefulness of the complementary Barker code. Whereas the chirp correlation envelope has two significant principal sidelobes, the Barker envelope has no such sidelobes
Keywords :
acoustic signal processing; acoustic transducers; codes; frequency modulation; phase shift keying; transient response; Barker envelope; PSK; acoustic transducers; chirp correlation envelope; complementary Barker code; crosscorrelation; frequency modulation; impulse response deconvolution; phase modulation; phase modulation code; pulse compression; recorded signals; reference signals envelope; sidelobes; Acoustic transducers; Autocorrelation; Chirp modulation; Deconvolution; Frequency modulation; Loudspeakers; Phase modulation; Phase shift keying; Synthetic aperture radar; Transceivers;
Conference_Titel :
Electrical and Computer Engineering, 1993. Canadian Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-2416-1
DOI :
10.1109/CCECE.1993.332308
