Digital Self-Interference Cancellation for Different Modulation Formats

In-band full-duplex technology (IBFD) enables a device to simultaneously transmit and receive on the same frequency and at the same time. The principal advantage of IBFD is that it doubles the spectral efficiency, which is of particular interest considering the limited availability of the frequency spectrum. This workshop presentation examines the efficacy of digital self-interference cancellation for different modulation formats within the VHF band. The cancellation algorithms employed are a conventional least-squares polynomial approach and a modern machine learning approach are employed. The interference cancellation ratio of the analog modulation formats AM, FM, and PM is compared to that of digital modulation formats, including OFDM in simulations and measurements.