Analog Quadrature Modulator and Coupling Circuit for Narrowband Power Line Communication

Abstract

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.