Multi-beam Bathymetry Method Based on Low Autocorrelated Sidelobe Binary Sequences and Its Implementation on FPGA

DOI

10.2991/iiicec-15.2015.329How to use a DOI?

Keywords

multi-beam; pulse compression; FPGA; low autocorrelated sidelobe binary sequences

Abstract

Given the problem that the range resolution is reduced as a result of overcoming the reduction of SNR (Signal to Noise Ratio) of echo signal only by enlarging the pulse length due to deeper water depth and worsened turbidity in multi-beam bathymetry of single frequency pulse, multi-beam bathymetry method based on low autocorrelated sidelobe binary sequences was proposed. Firstly, the principles of multi-beam bathymetry based on low autocorrelated sidelobe binary sequences were discussed, then the SNRs and resolution performances of narrow pulse method and low autocorrelated sidelobe binary sequences method were compared by means of software simulation, and it was verified by a shallow water multi-beam bathymetric system with wide coverage in a test on Songhua Lake. The results show that this method effective increases SNR and improves bathymetry quality at the premise of ensuring the bathymetry accuracy. Finally, a rapid calculation structure based on FPGA was proposed. The results show that this structure which has comparatively small calculation amount makes it possible to realize real-time processing.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Haisen Li
AU  - Dong Lu
AU  - Baowei Chen
AU  - Tian Zhou
PY  - 2015/03
DA  - 2015/03
TI  - Multi-beam Bathymetry Method Based on Low Autocorrelated Sidelobe Binary Sequences and Its Implementation on FPGA
BT  - Proceedings of the 2015 International Industrial Informatics and Computer Engineering Conference
PB  - Atlantis Press
SP  - 1482
EP  - 1485
SN  - 2352-538X
UR  - https://doi.org/10.2991/iiicec-15.2015.329
DO  - 10.2991/iiicec-15.2015.329
ID  - Li2015/03
ER  -