A GI Proposal to Display ECG Digital Signals Wirelessly Real-time Transmitted onto a Remote PC
The sensors, as wireless communication system, comply the 7-layer model Open Systems Interconnection (OSI). In this paper, a point-to-point transmission model was used. The ECG signal is transmitted from the Router Sensor (RS) to an end Coordinator Node (CN) plugged-in to the laptop via USB port; RS acquires ECG signal in analogical mode, and is also responsible with sampling, quantization and sending it wirelessly direct to CN. The distance between RS and CN is a single-hop transmission, and does not exceed the range of the XBeeS2Pro transceivers. The communication protocol is ZigBee. Remote viewing of the transmitted signal is performed on a Graphical Interface (GI) written under MATLAB, after the signal has been digitized; the choice of MATLAB was motivated by future developments. Particular aspects will be highlighted, so that the reader to be edified about the results obtained during laboratory experiments. Recording demonstrate that the purpose exposed in title has been reached: Direct link in Real-Time was established, and the digital ECG signal received is reconstituted accurately on MATLAB GI; signal received on laptop is compared with the analog signal displayed on oscilloscope.
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