Application of frequency estimation algorithm based on a single vector sensor in underwater acoustic communication

Abstract

A method of high resolution frequency estimation based on a single vector sensor using ESPRIT (Estimating Signal Parameters via Rotational Invariance Techniques) algorithm is proposed and applied to the underwater acoustic (UWA) communication system of frequency modulation. Higher resolution frequency estimation can be obtained by this algorithm using fewer snapshots comparing with the sound intensity frequency estimation. Results of simulation and lake experiment show that the proposed algorithm can improve the communication data rate and reduce the bandwidth of the system. Because higher signal-to-noise ratio (SNR) is demanded, this algorithm can be used in high speed short range UWA communication at present.

Keywords

vector sensor / ESPRIT algorithm / frequency estimation / sound intensity

References

[1] Shchurov V. A. The interaction of energy flows of underwater ambient noise and local source[J]. Journal of the Acoustical Society of America, 1991, 90(2): 1002-1004

[2] D’spain G. L., Hodgkis W. S., Edmons G. L. Energetics of the deep ocean’s infrasonic sound field[J]. Journal of the Acoustical Society of America, 1991, 89(3): 1134-1157

[3] Roy R. H., Kailath T. ESPRIT-Estimation of signal parameters via rotational invariance techniques[J]. IEEE Transactions on ASSP, 1989, 37(7): 984-995

[4] Wong K. T., Zoltowski M. D. Closed-form underwater acoustic direction-finding with arbitrarily spaced vector hydrophones at unknown location[J]. IEEE Journal of Oceanic Engineering, 1999, 22(4): 649-658

[5] Ticharsky P., Wong K. T., Zoltowski M. D. Near-field/far-field azimuth and elevation angle estimation using a single vector hydrophone[J]. IEEE Transactions on Signal Processing, 2001, 49(11): 2498-2510

[6] Sun G., Li Q. Progress of study on acoustic vector sensor[J]. Acta Acustica, 2004, 29(6): 481-490

[7] Sun G., Yang D., Zhang L. Research on the method for measuring radiated noise by an underwater target in low frequency band based on the vector hydrophone[J]. Acta Acustica, 2002, 27(5): 429-434