Parallel Implementation Technique of Digital Equalizer for Ultra-High-Speed Wireline Receiver

Kim, Gain; Kull, Lukas; Luu, Danny; Braendli, Matthias; Menolfi, Christian; Francese, Pier Andrea; Aprile, Cosimo; Morf, Thomas; Kossel, Marcel; Cevrero, Alessandro; Özkaya, İlter; Toifl, Thomas; Leblebici, Yusuf

doi:10.1109/iscas.2018.8350924

Cited by 2 publications

(1 citation statement)

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“…However, recent work has demonstrated data converters operating at sampling rates up to 90 GS/s with a resolution of 8 bits or higher [13], [14]. Moreover, the DSP required for DMT has been implemented with low power consumption [15]. Therefore, there is a renewed interest in examining the potential of DMT for high-speed wireline communication, with a recent example [16] reporting a receiver energy efficiency of 2.9 pJ/b at 56 Gb/s.…”

Section: Introductionmentioning

confidence: 99%

A Study of Discrete Multitone Modulation for Wireline Links Beyond 100 Gb/s

Vatankhahghadim

Wary

Bailey

et al. 2021

IEEE Open J. Circuits Syst.

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To overcome the severe losses beyond 28 GHz in low-cost electrical channels, 4-level pulseamplitude modulation (4-PAM) wireline links targeting 112 Gb/s incorporate resource-or power-intensive equalization schemes such as decision-feedback equalizers (DFE) with many taps. Alleviating the timing constraints that cause DFEs to balloon in size and power, discrete multitone (DMT) modulation involves independent sub-channels that can be equalized in the frequency domain without feedback. DMT allows flexibility in assigning bits to each sub-channel, thereby potentially avoiding lossy parts of the frequency spectrum. This article presents behavioural modeling results and an experimental setup used to study DMT transceivers. Our simulations show 200 Gb/s operation at a bit error rate (BER) of less than 10 −5 over an IEEE P802.3ck channel with 21 dB of loss at 50 GHz and assuming 150 fs rms of jitter, 1.26 mV rms of noise at the receiver's input, and 7-bit 80 GS/s data converters. An updated bit-loading algorithm led to BER values 1-2 orders of magnitude below our previous results. The estimated power and area of the associated digital signal processing are comparable to those of DFE. We also present an experimental DMT setup achieving 61.6 Gb/s at a BER of 8.6 × 10 −4 over a physical channel with severe notches that is very challenging for 4-PAM. INDEX TERMS Digital modulation, digital signal processing (DSP), discrete multitone (DMT), transceivers, wireline communication.

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Section: Introductionmentioning

confidence: 99%