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This paper presents a novel double-differentially coded spread-spectrum (DD–SS) system design for long-range acoustic communications (LRAC) between a moving source and a towed horizontal line array (HLA). The proposed design relies on two techniques that have been historically developed for radio-frequency terrestrial wireless communications, namely, direct sequence spread spectrum and double-differential...
In this paper, a novel 3D localization and identification system based on surface acoustic wave (SAW) devices has been designed and modeled. Two mobile SAW devices have been tracked based on the time of arrival (TOA) approach. The capability of the system to track multiple sensors within the same observation area is demonstrated by configuring the SAW devices in different geometries. Using Barker...
In our previous work on multiuser communications, two methods were investigated for user separation in a time-invariant, underwater acoustic environment. The first method employed the conventional and adaptive time-reversal mirrors to either passively or actively remove multiuser interference, and the second introduced iterative, successive interference cancellation (SIC) as another active procedure...
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