Covert underwater communications with multiband OFDM

Author

Leus, Geert ; van Walree, Paul ; Boschma, Jeroen ; Fanciullacci, Claudio ; Gerritsen, Hans ; Tusoni, Paolo

Author_Institution

Delft Univ. of Technol., Delft

fYear

2008

fDate

15-18 Sept. 2008

Firstpage

1

Lastpage

8

Abstract

We consider the use of orthogonal frequency division multiplexing (OFDM) for covert acoustic telemetry. To reduce the complexity of the receiver we use a multiband approach, modulating each band by OFDM. The system has been tested at sea in a highly time-varying environment. A total bandwidth of 3.6 kHz was divided in 16 subbands. Data rates of 4.2 and 78 bit/s were adopted over ranges up to 52 km. At 78 bit/s, communication is successful at SNRs down to -8 dB, whereas the lower rate allows data transfer at SNRs down to at least -16 dB.

Keywords

OFDM modulation; radio receivers; underwater acoustic telemetry; covert acoustic telemetry; covert underwater communications; data transfer; multiband OFDM; orthogonal frequency division multiplexing; radio receiver; time varying environment; Acoustic noise; Bit error rate; Decoding; Frequency synchronization; OFDM modulation; Phase shift keying; Signal to noise ratio; Underwater acoustics; Underwater communication; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS 2008

Conference_Location

Quebec City, QC

Print_ISBN

978-1-4244-2619-5

Electronic_ISBN

978-1-4244-2620-1

Type

conf

DOI

10.1109/OCEANS.2008.5151860

Filename

5151860