System for tracking and navigation of underwater vehicles or divers by means of acoustic distance and or direction measurements, and subsequent position triangulation.
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ANNA UNIVERSITY QUESTION BANK FOR 2013 REGULATION OF THIRD YEAR 4TH SEM WIRELESS COMMUNICATION
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Wireless Communication and Rf System Design Using Matlab and Simulink
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Gesture based communication system is designed keeping in mind the communication needs of the people who are either bedridden or suffer from some kind of speech impairment. The main benefit of this system is that it's not necessary for some other per
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Light Fidelity Li Fi technology is a novel method of wireless communication network based on the use of visible LED lights between the violet 800 THz and red 400 THz to transmit data wirelessly. Li Fi has much broader spectrum compared to conventiona
IR Wireless Underwater Communication System Synopsis:
The system uses the ultra-low power MCU as the control core, and uses the infrared wireless communication, achieving a simple underwater wireless communication. The entire system consists of 3 parts, the land-based unit, the electrical unit and the submarine model. The land-based unit uses the ASK modulation to achieve wireless communication with the submarine model. The submarine model receives and decodes signals, then communicates with model unit via infrared light waves .The motor unit receives the infrared signals and keeps the floating and diving of the submarine model by controlling the suspension.
Underwater communications exploit
interconnect microcontroller systems
deployed
acoustic for
various
signals
to
scientific,
environmental, industrial, or security tasks. The engineering of networked devices in underwater surroundings is nowadays considered a crucial analysis challenge. The propagation of acoustic waves in water is characterised by low, distancedependent bandwidth with high latency, and multi-path effects, which build it necessary the look of novel system-level solutions, communication protocols, and algorithms specifically tailored for these sorts of applications. Here we propose an IR based underwater communication system that can be used for wireless communication of messages even through water. The system can prove to be a very cheap alternative to long heavy physical wires that run through seas, rivers and require large costs for laying those wires and their maintenance. Our system makes use of infrared transmitter receiver in order to achieve this system. Our system consists of two microcontroller based circuits that have IR
transmitter-receiver pairs as well as LCD displays for displaying the messages. Each system has a keyboard connected to it in order to type in messages. We use two water barrels in order to demonstrate underwater communication using ir signals passing through those containers. The system also has an acknowledgement receipt message that is sent back from the receiving circuit to the transmitting circuit on message receipt. This allows for efficient communication between two circuits wirelessly.
