Title :
Time-scale analysis on harmonic signal and bionic anti-reverberation waveform design
Author :
Changsheng Yang ; Bingxu Ren ; Shuang Wu ; Ran Fang
Author_Institution :
Sch. of Marine Sci. & Technol., Northwestern Polytech. Univ., Xi´an, China
Abstract :
Animal sonar performance is quite better than man-made sonar system, especially in cluttered environment. The harmonic structure sound produced by big brown bat played an important role in echolocation in forests situation. Bat-like harmonic signal resolution was analyzed by Auto-Wideband Ambiguity Function (WAF). For Hyperbolic Frequency Modulation (HFM) signal, the time-scale resolution was related to the fractional bandwidth of the fundamental and secondary harmonic waveform. A high resolution and anti-reverberation signal with 2 harmonic was designed. The simulation under heavy clutters (SRR -5dB) proved the bionic designed signal performed better.
Keywords :
bioacoustics; biocybernetics; biological techniques; frequency modulation; mechanoception; signal resolution; sonar signal processing; HFM signal; WAF; animal sonar performance; auto-wideband ambiguity function; bat-like harmonic signal resolution; big brown bat; bionic antireverberation waveform design; echolocation; fractional bandwidth; harmonic structure sound production; hyperbolic frequency modulation signal; secondary harmonic waveform; time-scale analysis; Bandwidth; Educational institutions; Frequency modulation; Harmonic analysis; Reverberation; Signal resolution; Sonar; Bionic; anti-reverberation; harmonic signal; signal analysis; waveform design;
Conference_Titel :
Image and Signal Processing (CISP), 2014 7th International Congress on
Conference_Location :
Dalian
DOI :
10.1109/CISP.2014.7003914
