Multiple-Valued Data Transmission Based on Time-Domain Pre-emphasis Techniques in Consideration of Higher-Order Channel Effects

This paper describes a Pulse-Width Modulation (PWM) pre-emphasis technique which utilizes time-domain information processing to increase the data rate for a given bandwidth of interconnection. The PWM pre-emphasis method does not change the pulse amplitude as for conventional FIR pre-emphasis, but instead exploits timing resolution. This fits well with recent CMOS technology trends toward higher switching speeds and lower voltage headroom. We discuss multiple-valued data transmission based on time-domain pre-emphasis techniques in consideration of higher-order channel effects.