Differential Edge Modulation Signaling for Low-Energy, High-Speed Wireline Communication

This paper proposes high-order differential edge modulation signaling (DEMS) for high-speed wireline links. We examine the performance of DEMS and present expressions for the symbol error rate in the presence of additive wideband noise. We find that the signal-to-noise ratio and symbol error rate improve for edge modulation relative to traditional amplitude-modulated signaling. Simulations with scaled supply voltages and lossy wireline channels confirm the improved voltage and timing margins of DEMS. We present expressions for the power spectral density of DEMS to illustrate that it is more spectrally efficient than conventional baseband modulation schemes, including pulse-amplitude modulation, alternate mark inversion, and Manchester-encoded signaling.