ABSTRACT
This chapter describes the ‘cognitive frequency exclusion’ concept in detail, specified in European Norm (EN) 50561–1. After an overview of the standardisation history, the high-frequency (HF) radio transmissions, the influence on the power line communication (PLC) spectrum, are shown. Thereafter, an excursion into the sensitivity of shortwave (SW) radio receivers follows. When the sensitivity of these devices is known, the threshold can be defined for receivable radio broadcast signals. If the frequencies to be excluded are known, requirements for a notch are defined. The process of adaptive modulation is described before calculating the impact of notching on the throughput of PLC. This allows the 602realisation of the notching concept with a minimal loss of throughput and implementation effort. The concept is verified by a hardware demonstrator system after discussing the theoretical aspects.
