Throughput Improvement Technique Using Adaptive Control of Perturbation Interval for Downlink Multi-User MIMO Based on Vector Perturbation
Summary :
In a downlink multi-user multiple-input multiple-output (MU-MIMO) system, the vector perturbation (VP) method, which is one of the non-linear precoding methods, is a promising technique with which to maximize the channel capacity. In the VP method, the receiver requires the modulo operation to remove the perturbation signal added at the transmitter. However, owing to noise, the modulo operation may not run correctly which makes the soft demapper produce unreliable log-likelihood ratios (LLRs), resulting in a degradation of system throughput. To enhance the throughput performance, we propose a method that expands the basic perturbation interval and adaptively controls the expansion rate according to the modulation and coding scheme (MCS). The optimum expansion rate is derived by link-level simulation and the system throughput is measured by system-level simulation. The system-level simulation results show that the proposed VP method can obtain higher throughput than the conventional VP method.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E95-B No.9 pp.2861-2869
- Publication Date
- 2012/09/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E95.B.2861
- Type of Manuscript
- PAPER
- Category
- Antennas and Propagation
Authors
Keyword
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Hiroki MORI, Yuji TOHZAKA, Tsuguhide AOKI, Yasuhiko TANABE, "Throughput Improvement Technique Using Adaptive Control of Perturbation Interval for Downlink Multi-User MIMO Based on Vector Perturbation" in IEICE TRANSACTIONS on Communications,
vol. E95-B, no. 9, pp. 2861-2869, September 2012, doi: 10.1587/transcom.E95.B.2861.
Abstract: In a downlink multi-user multiple-input multiple-output (MU-MIMO) system, the vector perturbation (VP) method, which is one of the non-linear precoding methods, is a promising technique with which to maximize the channel capacity. In the VP method, the receiver requires the modulo operation to remove the perturbation signal added at the transmitter. However, owing to noise, the modulo operation may not run correctly which makes the soft demapper produce unreliable log-likelihood ratios (LLRs), resulting in a degradation of system throughput. To enhance the throughput performance, we propose a method that expands the basic perturbation interval and adaptively controls the expansion rate according to the modulation and coding scheme (MCS). The optimum expansion rate is derived by link-level simulation and the system throughput is measured by system-level simulation. The system-level simulation results show that the proposed VP method can obtain higher throughput than the conventional VP method.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E95.B.2861/_p
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@ARTICLE{e95-b_9_2861,
author={Hiroki MORI, Yuji TOHZAKA, Tsuguhide AOKI, Yasuhiko TANABE, },
journal={IEICE TRANSACTIONS on Communications},
title={Throughput Improvement Technique Using Adaptive Control of Perturbation Interval for Downlink Multi-User MIMO Based on Vector Perturbation},
year={2012},
volume={E95-B},
number={9},
pages={2861-2869},
abstract={In a downlink multi-user multiple-input multiple-output (MU-MIMO) system, the vector perturbation (VP) method, which is one of the non-linear precoding methods, is a promising technique with which to maximize the channel capacity. In the VP method, the receiver requires the modulo operation to remove the perturbation signal added at the transmitter. However, owing to noise, the modulo operation may not run correctly which makes the soft demapper produce unreliable log-likelihood ratios (LLRs), resulting in a degradation of system throughput. To enhance the throughput performance, we propose a method that expands the basic perturbation interval and adaptively controls the expansion rate according to the modulation and coding scheme (MCS). The optimum expansion rate is derived by link-level simulation and the system throughput is measured by system-level simulation. The system-level simulation results show that the proposed VP method can obtain higher throughput than the conventional VP method.},
keywords={},
doi={10.1587/transcom.E95.B.2861},
ISSN={1745-1345},
month={September},}
Copy
TY - JOUR
TI - Throughput Improvement Technique Using Adaptive Control of Perturbation Interval for Downlink Multi-User MIMO Based on Vector Perturbation
T2 - IEICE TRANSACTIONS on Communications
SP - 2861
EP - 2869
AU - Hiroki MORI
AU - Yuji TOHZAKA
AU - Tsuguhide AOKI
AU - Yasuhiko TANABE
PY - 2012
DO - 10.1587/transcom.E95.B.2861
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E95-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 2012
AB - In a downlink multi-user multiple-input multiple-output (MU-MIMO) system, the vector perturbation (VP) method, which is one of the non-linear precoding methods, is a promising technique with which to maximize the channel capacity. In the VP method, the receiver requires the modulo operation to remove the perturbation signal added at the transmitter. However, owing to noise, the modulo operation may not run correctly which makes the soft demapper produce unreliable log-likelihood ratios (LLRs), resulting in a degradation of system throughput. To enhance the throughput performance, we propose a method that expands the basic perturbation interval and adaptively controls the expansion rate according to the modulation and coding scheme (MCS). The optimum expansion rate is derived by link-level simulation and the system throughput is measured by system-level simulation. The system-level simulation results show that the proposed VP method can obtain higher throughput than the conventional VP method.
ER -
English
