Joint Optimization of Transmit Pulse Shaping, Guard Interval Length, and Receiver Side Narrow-Band Interference Mitigation in the HomePlugAV OFDM System

The primary subject of this paper is the selection of a pulse-shaping waveform for in-home power line communications. As system performance is also determined by other parameters affecting the length and shaping of the OFDM symbol, the problem formulation is expanded to also include the simultaneous selection of guard interval length and Hanning window length, creating a joint optimization problem. Given the constraints of allowing no transmit notch filters, and adequate receive side mitigation of narrow band jammers, we jointly optimize the selection of guard interval length, transmit pulse-shaping and receive side windowing for throughput performance on the average power line channel. Throughput performance is inferred from SNR data and associated guard interval overhead. We also present results of performance assessment and parameter selection, for the average power line channel, based on a collection of 120 measured power line channel impulse responses.