Channel coded iterative center-shifting K-best sphere detection for rank-deficient systems
Channel coded iterative center-shifting K-best sphere detection for rank-deficient systems
Based on an EXtrinsic Information Transfer (EXIT) chart assisted receiver design, a low-complexity near-Maximum A Posteriori (MAP) detector is constructed for high-throughput MIMO systems. A high throughput is achieved by invoking high-order modulation schemes and/or multiple transmit antennas, while employing a novel sphere detector (SD) termed as a center-shifting SD scheme, which updates the SD’s search center during its consecutive iterations with the aid of channel decoder. Two low-complexity iterative center-shifting SD aided receiver architectures are investigated, namely the direct-hard-decision centershifting (DHDC) and the direct-soft-decision center-shifting (DSDC) schemes. Both of them are capable of attaining a considerable memory and complexity reduction over the conventional SD-aided iterative benchmark receiver. For example, the DSDC scheme reduces the candidate-list-generation-related and extrinsic-LLR-calculation related complexity by a factor of 3.5 and 16, respectively. As a further benefit, the associated memory requirements were also reduced by a factor of 16.
1-5
Wang, Li
48544830-2bcb-4cfa-a33e-343ebfbe4aac
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Xu, Lei
ec8d4856-7b30-4dc5-8a8b-05157450e274
September 2008
Wang, Li
48544830-2bcb-4cfa-a33e-343ebfbe4aac
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Xu, Lei
ec8d4856-7b30-4dc5-8a8b-05157450e274
Wang, Li, Chen, Sheng, Hanzo, Lajos and Xu, Lei
(2008)
Channel coded iterative center-shifting K-best sphere detection for rank-deficient systems.
In 2008 IEEE 68th Vehicular Technology Conference.
IEEE.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Based on an EXtrinsic Information Transfer (EXIT) chart assisted receiver design, a low-complexity near-Maximum A Posteriori (MAP) detector is constructed for high-throughput MIMO systems. A high throughput is achieved by invoking high-order modulation schemes and/or multiple transmit antennas, while employing a novel sphere detector (SD) termed as a center-shifting SD scheme, which updates the SD’s search center during its consecutive iterations with the aid of channel decoder. Two low-complexity iterative center-shifting SD aided receiver architectures are investigated, namely the direct-hard-decision centershifting (DHDC) and the direct-soft-decision center-shifting (DSDC) schemes. Both of them are capable of attaining a considerable memory and complexity reduction over the conventional SD-aided iterative benchmark receiver. For example, the DSDC scheme reduces the candidate-list-generation-related and extrinsic-LLR-calculation related complexity by a factor of 3.5 and 16, respectively. As a further benefit, the associated memory requirements were also reduced by a factor of 16.
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Published date: September 2008
Additional Information:
Event Dates: September 21-24, 2008
Venue - Dates:
2008 IEEE 68th Vehicular Technology Conference, , Calgary, Canada, 2008-09-21 - 2008-09-24
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 266752
URI: http://eprints.soton.ac.uk/id/eprint/266752
PURE UUID: bbcd68c1-e34e-49df-a0be-aaca127c0121
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Date deposited: 03 Oct 2008 08:53
Last modified: 18 Mar 2024 02:34
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Contributors
Author:
Li Wang
Author:
Sheng Chen
Author:
Lajos Hanzo
Author:
Lei Xu
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