Antenna grouping based feedback reduction for FDD-based massive MIMO systems

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Recent works on massive multiple-input multiple-output (MIMO) have shown that a potential breakthrough in capacity gains can be achieved by deploying a very large number of antennas at the basestation. Although transmit-side channel state information (CSI) can be obtained by employing channel reciprocity in time division duplexing (TDD) systems, explicit feedback of CSI from the user to the basestation is required for frequency division duplexing (FDD) systems. In this paper, we propose an antenna grouping based feedback reduction technique for FDD-based massive MIMO systems. The proposed algorithm, dubbed antenna group beamforming (AGB), groups antenna elements using pre-designed patterns. The proposed method introduces the concept of using a header of overall feedback resources to select a suitable group pattern and the payload to quantize the effective channel vector. Simulation results show that the proposed method achieves significant feedback overhead reduction over conventional approach. © 2014 IEEE.
Publisher
IEEE Computer Society
Issue Date
2014-06
Language
English
Citation

2014 1st IEEE International Conference on Communications, ICC 2014, pp.4477 - 4482

DOI
10.1109/ICC.2014.6884026
URI
http://hdl.handle.net/10203/267437
Appears in Collection
RIMS Conference Papers
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