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Approximate perturbation aided lattice encoding (APPLE) for G.fast and beyond

Approximate perturbation aided lattice encoding (APPLE) for G.fast and beyond
Approximate perturbation aided lattice encoding (APPLE) for G.fast and beyond
G.fast suffers from strong far-end crosstalk at high frequencies in cable binders containing a large number of twisted copper pairs. For the 212-MHz G.fast spectrum, the power penalty incurred by the conventional zero-forcing precoding-based linear vectoring (LV) scheme is far more substantial than it was over the 30-MHz VDSL2 spectrum. In this paper, we propose a novel non-LV (NLV) scheme based on Babai’s nearest plane approximation of the closest lattice point problem on the reduced lattice basis. Similar to the conventional Tomlinson–Harashima precoding (THP)-based NLV, the proposed approximate perturbation aided lattice encoding (APPLE) scheme closely approaches the dirty paper coding capacity which provided that the system employs a fully rate-adaptive power allocation policy per tone per pair. However, if the system employs a scalar power policy that is only rate-adaptive with respect to each tone, APPLE becomes capable of achieving a higher throughput per binder than THP. APPLE’s transmitter complexity is considerably lower than that of the conventional lattice encoding schemes (e.g., vector perturbation) and comparable to that of THP.
2169-3536
53438-53451
Zhang, Yangyishi
d5f57adf-3d5c-4131-84b7-0113a4b2b2b7
Zhang, Rong
3be8f78f-f079-4a3f-a151-76ecd5f378f4
Al Rawi, Anas F.
3dc2fc54-4b70-40f1-9511-8fa054e307e7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Zhang, Yangyishi
d5f57adf-3d5c-4131-84b7-0113a4b2b2b7
Zhang, Rong
3be8f78f-f079-4a3f-a151-76ecd5f378f4
Al Rawi, Anas F.
3dc2fc54-4b70-40f1-9511-8fa054e307e7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Zhang, Yangyishi, Zhang, Rong, Al Rawi, Anas F. and Hanzo, Lajos (2018) Approximate perturbation aided lattice encoding (APPLE) for G.fast and beyond. IEEE Access, 6, 53438-53451. (doi:10.1109/ACCESS.2018.2871026).

Record type: Article

Abstract

G.fast suffers from strong far-end crosstalk at high frequencies in cable binders containing a large number of twisted copper pairs. For the 212-MHz G.fast spectrum, the power penalty incurred by the conventional zero-forcing precoding-based linear vectoring (LV) scheme is far more substantial than it was over the 30-MHz VDSL2 spectrum. In this paper, we propose a novel non-LV (NLV) scheme based on Babai’s nearest plane approximation of the closest lattice point problem on the reduced lattice basis. Similar to the conventional Tomlinson–Harashima precoding (THP)-based NLV, the proposed approximate perturbation aided lattice encoding (APPLE) scheme closely approaches the dirty paper coding capacity which provided that the system employs a fully rate-adaptive power allocation policy per tone per pair. However, if the system employs a scalar power policy that is only rate-adaptive with respect to each tone, APPLE becomes capable of achieving a higher throughput per binder than THP. APPLE’s transmitter complexity is considerably lower than that of the conventional lattice encoding schemes (e.g., vector perturbation) and comparable to that of THP.

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Accepted/In Press date: 3 September 2018
e-pub ahead of print date: 19 September 2018

Identifiers

Local EPrints ID: 423196
URI: http://eprints.soton.ac.uk/id/eprint/423196
ISSN: 2169-3536
PURE UUID: 8a802fcb-25c1-42b5-aa4d-806cbbd5094f
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 19 Sep 2018 16:30
Last modified: 07 Oct 2020 01:33

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Contributors

Author: Yangyishi Zhang
Author: Rong Zhang
Author: Anas F. Al Rawi
Author: Lajos Hanzo ORCID iD

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