Simultaneous bi-directional signaling with adaptive pre-emphasis

Ming Ta Hsieh, Gerald E. Sobelman

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


This paper presents a novel design for a simultaneous bi-directional signaling system with an adaptive pre-emphasis feature. The feedback loop inherent in a simultaneous bi-directional link provides a natural opportunity to use adaptive pre-emphasis to compensate for channel characteristics. The system determines the degree of corruption of a received signal and generates a pulse width modulated signal which gets sent back through the bi-directional link to control the amount of pre-emphasis that is used. The technique has been verified using Cadence SpectreRF and Verilog-A simulators, where the channel loss characteristics are based on an FR-4 material model. The simulation results show that the system automatically selects the best fit for the observed channel loss compensation, which then reduces the efforts needed to recover the data at each receiver.

Original languageEnglish (US)
Pages (from-to)IV-397-IV-400
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - Sep 6 2004
Event2004 IEEE International Symposium on Cirquits and Systems - Proceedings - Vancouver, BC, Canada
Duration: May 23 2004May 26 2004


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