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A high-performance low-latency transmission system based on a concatenated code consisting of inner four-dimensional five-level pulse-amplitude-modulation (5-PAM) trellis-coded modulation and an outer Reed-Solomon (RS) code is proposed for a high-speed data link over time-dispersive channels. The implementation of high-speed sequence detection in state-of-the-art technology nodes is enabled by a novel...
The implementation of a digital four-level pulse-amplitude-modulation reduced-state sliding-block Viterbi detector (VD) with two substates and two embedded per-survivor decision-feedback taps operating at one-eighth of the modulation rate is described. Implemented in an experimental chip fabricated in 14nm CMOS, the VD is designed to recover data at 25.6 Gb/s over an emulated time-dispersive channel...
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