Design of Low Power Underwater Acoustic Receiving Circuit with Digital Gain Control

Abstract:

We propose a design of low power underwater acoustic receiving circuit by inverted echo sounder (IES) for observing the internal waves of the ocean in a long term. To receive the echo of the underwater targets, the underwater acoustic signal processor is required to be insensitive to strong noise and work in large dynamic range. In this work, with the variant application environments, to reduce the load of the subsequent processing modules, the circuit with digital gain control is employed to amplify the weak signals. Then, the out-of-band noise and higher harmonic are filtered out. The output is finally obtained by the 24-bit high-precision A/D sampling. Experiments demonstrate that the proposed design of the circuit performs with low power consumption, low noise, large dynamic range, flexible frequency selectivity, high precision and anti-inference.

• Periodical: Advanced Materials Research (Volumes 718-720)
• Pages: 1416-1421
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.718-720.1416
• Online since: July 2013
• Authors: Ya Fei Tang, Jian Ping Xiong
• Keywords: Digital Gain Control, Inverted Echo Sounder, Large Dynamic Range, Low Power

References

[1] Q. Li, D. M. Farmer, T. F. Duda, and S. Ramp, Acoustical Measurement of Nonlinear Internal Waves Using the Inverted Echo Sounder, J. Atmos. Oceanic Technol., 26 (2009) 2228–2242.

DOI: 10.1175/2009jtecho652.1

[2] C. Clay and H. Medwin, Acoustical Oceanography Principles and Applications, John Wiley & Sons, 1997.

[3] R. Urick, Principles of Underwater Sound, 3rd Edition, Peninsula Pub, 1996.

[4] X. Ping and C. Li, Underwater Location Method based on Signal Amplitude Attenuation, Modern Electronics Technique. 09.35 (2012) 81-83.

[5] W. Wei and X. Zhang, Design of Low Power Acoustic Receiver System, Foreign Electronic Measurement Technology, 04 (2012).

[6] D. Ji, X. Cheng, J. Liu and X. Feng, Optimal Design and Research of Small Signal Amplifier with Low Power Consumption, Chinese Journal of Electron Devices, 04(2008).

[7] G. Shuai, Design and Implementation of A New Hydroacoustic Receiver based on Source Level Measurement, Ship Science and Technology, 1672-7649(2012)05-0094-04.

[8] L. Zhang, Y. Wang, K. Zheng and Q. Wang, A Design Method of High Consistency Low Noise Multi-Channel Underwater Acoustic Signal Pretreatment, Audio Engineering, 1002-8684(2012)09.

[9] S. Zhang, W. Zheng, D. Huang and C. Zhao, The Design of Preamplifier Circuit based on Weak Signal Detection, Microcomputer Information 1008-0570 (2009) 08-2-0233-02.

[10] D. Johnson and J. Hiburn, Rapid Practical Designs of Active Filters, People Posts and Telecommunications Press, 1980.

[11] Information on http://www.analog.com/static/imported-files/data_sheets/AD8253.pdf

[12] Information on http://www.analog.com/static/imported-files/data_sheets/AD7767.pdf