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Zero-Forcing Beamforming with Semiorthogonal User Selection Modified for Reducing Feedback Information

Title
Zero-Forcing Beamforming with Semiorthogonal User Selection Modified for Reducing Feedback Information
Author
김동우
Keywords
Feedback load; Modified semiorthogonal user selection algorithm (mSUS); Multiple-input / multiple-output (MIMO); Zero-forcing beamforming (ZFBF)
Issue Date
2006-10
Publisher
IEEE
Citation
2006 Fortieth Asilomar Conference on Signals, Systems and Computers, Page. 1536-1539
Abstract
In this paper, we propose a modified version of zero-forcing beamforming with semiorthogonal user selection (SUS) (ZFBF with mSUS) which will dramatically reduced the feedback load compared with the original one. In ZFBF with mSUS, the base station requires the channel state information (CSI) only from the users who have larger SNR than a predefined threshold. Adjusting the threshold changes the amount of feedback as well as the throughput. We show that the performance of this modified version is also asymptotically close to that of dirty paper coding (DPC). With numerical investigation, the feedback load is shown to be greatly reduced. Although the proposed method achieves slightly lower throughput than that of ZFBF with SUS especially for a small number of users since we do not optimize algorithm parameters in the simulation, the performance gap quickly vanishes as the number of users becomes large.
URI
https://ieeexplore.ieee.org/document/4176825http://repository.hanyang.ac.kr/handle/20.500.11754/108574
ISSN
1058-6393
DOI
10.1109/ACSSC.2006.355015
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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