Adaptive Feedback of the Channel Information for Beamforming in IEEE 802.11ax WLANs

被引：1

作者：

Jeon, Eunsung ^{[1
]}

Lee, Wook Bong ^{[2
]}

Ahn, Minki ^{[1
]}

Kim, Sungsoo ^{[1
]}

Kim, Joonsuk ^{[1
]}

机构：

[1] Samsung Elect Co Ltd, Connect Dev Team, Suwon, South Korea

[2] Samsung Elect Co Ltd, SoC WiFi R&D, Ridgefield Pk, NJ USA

来源：

2019 IEEE 90TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2019-FALL) | 2019年

关键词：

IEEE; 802.11ax; beamforming; SVD; GMD;

D O I：

10.1109/vtcfall.2019.8891127

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, we propose an adaptive beamforming matrix feedback scheme, which guarantees the best packet error rate (PER) by selecting the beamforming matrix between singular value decomposition (SVD) and geometric mean decomposition (GMD) based beamforming matrices. The physical layer (PHY)-abstraction is utilized for joint PER prediction and modulation and coding scheme (MCS) level selection. In addition, a low complexity GMD is proposed where the iterative GMD process is converted to 2x2 block-wise GMD without iteration. Each 2x2 GMD is further simplified to remove the square-root and division operators for easy hardware implementation. The simulation is performed extensively via a 802.11ax link-level simulator. The results show that the proposed adaptive feedback scheme provides a significant performance gain in comparison to the conventional SVD- or GMD-based beamforming matrix feedback scheme. Also, the proposed GMD has an advantage in both complexity and PER performance when the number receive antenna is more than two.

引用

页数：6

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