Title :
Research on doppler frequency shift estimation in low Echo-to-Reverberation Ratio condition
Author :
Zhu, Mengyang ; Wang, Haiyan ; Shen, Xiaohong ; He, Ke ; Yan, Yongsheng
Author_Institution :
Coll. of Marine Eng., Northwestern Polytech. Univ., Xi´´an, China
Abstract :
Using the relationship between the number of zero-crossings and signal frequency, A Variable Bandwidth Band-pass Filter-Zero-Crossing Detection is proposed. This method can be used to estimate the echo frequency in Doppler Velocity Measurement. According to computer simulation, the estimation error of echo is 2 Hz approximately (Echo-to-Reverberation Ratio is -15 dB, echo frequency is 10360 Hz); according to experiment, the estimation error of echo is 4 Hz approximately (Echo-to-Reverberation Ratio is -3 dB, echo frequency is 8080 Hz). The amount of calculation of this method is lower than FFT. Therefore, this method has a good application prospects.
Keywords :
Doppler measurement; acoustic measurement; acoustic signal detection; band-pass filters; echo; frequency estimation; reverberation; underwater acoustic propagation; velocity measurement; Doppler frequency shift; Doppler velocity measurement; echo-to-reverberation ratio; estimation error; frequency 10360 Hz; frequency 8080 Hz; frequency estimation; signal frequency; underwater moving target velocity measurement; variable bandwidth bandpass filter-zero-crossing detection; Doppler Velocity Measurement; Low echo-to-reverberation; Zero-Crossing Detection; echo; estimation; frequency; underwater;
Conference_Titel :
Computer Science and Information Technology (ICCSIT), 2010 3rd IEEE International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-5537-9
DOI :
10.1109/ICCSIT.2010.5564130