CUED Publications database

High-current adaptive impedance matching in narrowband power-line communication systems

Sun, Y and Amaratunga, GAJ (2011) High-current adaptive impedance matching in narrowband power-line communication systems. 2011 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC 2011. pp. 329-334.

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Abstract

This paper proposes a high current impedance matching method for narrowband power-line communication (NPLC) systems. The impedance of the power-line channel is time and location variant; therefore, coupling circuitry and the channel are not usually matched. This not only results in poor signal integrity at the receiving end, but also leads to a higher transmission power requirement to secure the communication process. To offset this negative effect, a high-current adaptive impedance circuit to enable impedance matching in power-line networks is reported. The approach taken is to match the channel impedance of N-PLC systems is based on the General Impedance Converter (GIC). In order to achieve high current a special coupler in which the inductive impedance can be altered by adjusting a microcontroller controlled digital resistor is demonstrated. It is shown that the coupler works well with heavy load current in power line networks. It works in both low and high transmitting current modes, a current as high as 760 mA has been obtained. Besides, compared with other adaptive impedance couplers, the advantages include higher matching resolution and a simple control interface. Experimental results are presented to demonstrate the operation of the coupler. © 2011 IEEE.

Item Type: Article
Uncontrolled Keywords: automatic impedance adaptation digital inductive reactance convertor general impedance converter narrowband power-line communication
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:09
Last Modified: 08 Dec 2014 02:40
DOI: 10.1109/ISPLC.2011.5764417