| Power Line Communication (PLC) technology is considered as an alternative and cost effective last mile access and in-home networking technology. PLC offers not only voice but also the internet and the data services to customers over existing power line infrastructure. Transmitting signals in cable have many challenges because the transmission medium (environment) is always affected by noise, impedance, temperature. However, researches carried out so far, have proved the possibility of providing HDTV, multimedia service, Internet access with high speed, using power lines. And with the advent of very high performance signal processing techniques that result from the availability of chipsets specially designed for power line applications, many countries are now enjoying this promising technology.Although power line communications has been around for a couple of years, specific application of the technology in video surveillance is still a hot topic. In this research, operations of PLC, standards used in PLC, potential modulation schemes, communication channel characteristics (at Low Voltage level) are first studied. Then a customized and cost-effective PLC transceiver (modem) is proposed and designed for application in video monitoring, based on the Intellon INT5500(and its companion the INT1200) chipsets and other off-the shelf components. Experiments carried out using the manufactured transceiver, have shown that the performance of the devised modem is satisfactory (within the expected range). Finally, upon analysis of the experimental results, conclusions were drawn and some recommendations for future work were suggested. |
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