On the global EMC aspect of broadband power line communications using the "HF" frequency band

摘要: Measurement data and computer modelling is used to assess the potential of global cumulative radio interference effects caused by over horizon ionospheric propagation unwanted emissions from broadband power line communications (PLC) systems operating in HF band (1-30 MHz). A comparison results with ITU-R atmospheric noise atlas indicates that present natural levels electromagnetic quiet areas will not change significantly a possible future large deployment local access telecommunication using low voltage electricity distribution networks if maximum transmit spectral density per PLC cell (user group sharing same resources) below -40 dBm (Hz/sup -1/).