Skip to main content

News about Scitation

In December 2016 Scitation will launch with a new design, enhanced navigation and a much improved user experience.

To ensure a smooth transition, from today, we are temporarily stopping new account registration and single article purchases. If you already have an account you can continue to use the site as normal.

For help or more information please visit our FAQs.

banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
1. T. Cohen, “ More pings raise more questions about missing plane,” (Last viewed December 15, 2015).
2. E. J. Candes, P. R. Charlton, and H. Helgason, “ Detecting highly oscillatory signals by chirplet path pursuit,” Appl. Comput. Harmonic Anal. 24, 1440 (2008).
3. K. G. Kebkal and R. Bannasch, “ Sweep-spread carrier for underwater communication over acoustic channels with strong multipath propagation,” J. Acoust. Soc. Am. 112(5), 20432052 (2002).
4. B. G. Mobasseri and R. S. Lynch, “ Information embedding in sonar by modifications of time-frequency properties,” IEEE J. Ocean. Eng. 99, in press (2015).
5. X. Jiang, W.-J. Zeng, and X.-L. Li, “ Time-delay and Doppler scale estimation for wideband acoustic signals in multipath environments,” J. Acoust. Soc. Am. 130(2), 850857 (2011).

Data & Media loading...


Article metrics loading...



In many underwater acoustics problems such as search and rescue, it is desirable to establish the source of the sonar pings. In this paper a methodology is proposed to watermark sonar pulses prior to transmission by embedding them with a chain of low power chirplets represented by a graph. Watermark detection is formulated using stretch processing where chirplet energies are focused on a single beat frequency only if the graph is traversed along the same path used at the source. The algorithm is tested by simulation in shallow water at varying ranges.


Full text loading...


Access Key

  • FFree Content
  • OAOpen Access Content
  • SSubscribed Content
  • TFree Trial Content
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd