ABSTRACT
This chapter presents four pulse amplitude modulation (4-PAM) signaling as a means of proactively mitigating the adverse impacts of VBTI aging on the energy efficiency of photonic NoC (PNoC) architectures. The motivation for using 4-PAM signaling to counter the energy impacts of aging comes from the fact that 4-PAM signaling-based PNoC architectures can achieve significantly better energy efficiency compared to the traditional on-off keying (OOK) signaling-based PNoC architectures [10]. This improved energy efficiency of 4-PAM-based PNoCs is utilized in this chapter to provide proactive guarding against the adverse impacts of VBTI aging.
