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Fault-Tolerant Techniques to Minimize the Impact of Crosstalk on Phase Encoded Communication Channels

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2 Author(s)
Halak, B. ; Newcastle Univ., Newcastle upon Tyne ; Yakovlev, A.V.

An on-chip intermodule self-timed communication system is considered in which symbols are encoded by means of phase difference between transitions of signals on parallel wires. The reliability of such a channel is governed and significantly lowered by capacitive crosstalk effects between adjacent wires. A more robust high-speed phase-encoded channel can be designed by minimizing its vulnerability to crosstalk noise. This paper investigates the impact of crosstalk on phase-encoded transmission channels. A functional fault model is presented to characterize the problem. Two fault-tolerant schemes are introduced which are based on information redundancy techniques and a partial-order coding concept. The area overheads, performance, and fault-tolerant capability of those methods are compared. It is shown that a substantial improvement in the performance can be obtained for four-wire channels when using the fault-tolerant design approach, at the expense of 25 percent of information capacity per symbol.

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Computers, IEEE Transactions on  (Volume:57 ,  Issue: 4 )