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Title:
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Joint signaling strategies for approaching the capacity of twisted-pair channels |
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Author:
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Sendonaris, Andrew; Veeravalli, Venugopal V.; Aazhang, Behnaam
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Type:
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Journal Paper |
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Keywords:
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capacity; crosstalk; digital subscriber loops; multicarrier modulation; twisted-pair channel |
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Citation:
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A. Sendonaris, V. V. Veeravalli and B. Aazhang, "Joint signaling strategies for approaching the capacity of twisted-pair channels," IEEE Transactions on Communications, vol. 46, pp. 673-685, 1998. |
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Abstract:
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A technique is presented for jointly optimizing the signaling in the two directions of transmission on a twisted-pair communications channel. It is then applied to twisted-pair channel models with monotonic channel response and crosstalk transfer functions. While the signaling strategy presented in this paper can achieve only a lower bound on the true channel capacity, it is a significant improvement over existing signaling schemes. In particular, in contrast with existing schemes, the maximum information rate for the joint signaling strategy increases without bound as the signal-to-noise ratio (SNR) approaches infinity. It is also shown through numerical results that the proposed signaling strategy generalizes naturally to more practical nonmonotonic twisted-pair channel models incorporating bridge taps and other nonidealities. Finally, the form of the optimal signaling strategy suggests a relatively straightforward implementation using multicarrier modulation. |
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Date Published:
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1998-10-20 |
