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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
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 candidatelist- 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
IEEE
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
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. pp. 1-5 .

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 candidatelist- 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: 21 September 2008

Identifiers

Local EPrints ID: 448694
URI: http://eprints.soton.ac.uk/id/eprint/448694
PURE UUID: 0cabda0a-a5a2-46e6-ad23-e06e40356223
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 30 Apr 2021 16:31
Last modified: 01 May 2021 01:33

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Contributors

Author: Li Wang
Author: Sheng Chen
Author: Lajos Hanzo ORCID iD
Author: Lei Xu

University divisions

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