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Acoustic underwater sensor network (UWSN) is important in terms of business and for military applications. Optimum UWSN design provides a reliable connection with maximum connectivity, minimal multipath, low technical cost, and emphasis on energy conservation. This paper examines the channel estimation parameters, such as channel impulse response, coherence bandwidth, BER due to delay for differentially...
Underwater communications exists in many applications, providing information about the ocean floor such as bathymetry, for environmental pollution monitoring, information exchange between divers and sea vessel, and collection of scientific data. However, the propagation of sound in the sea is dependent on several environmental factors such as pressure which is related to depth, and some other ocean...
This paper focused on the analysis of underwater intermittent biological noises produced by dolphin, shrimp, seahorse, bubble samples. We analyzed the noise frequency spectrum and calculate sound level pressure for every sample in its frequency distribution. Using stationary test, signal changes in the interval of 0.1 second is observed. Assuming Gaussian distribution, normality trial is investigated...
This paper proposes a method that enables channel assignment distribution to be undertaken for wireless infrared ad hoc networking where the participant transceivers are equipped with directional LEDs. Multiple control handshake code signals are used for channel assignment and reassignment. By employing them at different unique carrier frequencies/channel, transmission with directional emitters reduces...
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