Acoustic communication in deep water exploiting multiple beams with a horizontal array.
A recent experiment showed that coherent long-range acoustic communication (200-300 Hz) is feasible in deep water over a ∼550-km range between a source and a horizontal towed array (∼100 m aperture). The low input signal-to-noise ratio (SNR) (e.g., -10 dB) at an element level required conventional beamforming to enhance the SNR of the communication signals for subsequent channel equalization and decoding. This paper demonstrates that with a larger aperture (∼200 m), multiple adjacent beams can be exploited to further improve the communication performance, achieving an almost error-free data rate of 100 bits/s for QPSK modulation at ∼550 km range.
Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093-0238, USA. hcsong@ucsd.edu
H C
HC
Song
D000162:Acoustics / Q000295:instrumentation*; D016014:Linear Models; D009038:Motion; D009792:Oceans and Seas; D012767:Ships; D012815:Signal Processing, Computer-Assisted; D059629:Signal-To-Noise Ratio; D013016:Sound; D013018:Sound Spectrography; D013685:Telecommunications / Q000295:instrumentation*; D013997:Time Factors; D014867:Water
D014867:Water