Analog Quadrature Modulator and Coupling Circuit for Narrowband Power Line Communication

J. Topiłko, K. Kucharski, K. Grabowski (FastLogic sp. z o.o., Poland), Ł. Starzak, Z. Mudza (Lodz Univ. of Techn., Poland)

An analog quadrature modulator-demodulator for narrowband power line communication (PLC) together with an adaptive grid coupler have been developed. They have been integrated in a PLC communication device and tested both in a laboratory benchmark and in a real channel. Bit error rates low enough for transmission speeds of up to 14400 b/s were achieved. The proposed solution has the advantages of low cost, limited microcontroller load as well as high versatility with respect to the modulation used and transmission parameters.