A Mobility-Aware Successive Feedback Scheme for 5G and Beyond Multi-User MIMO

To support gains in frequency division duplex multi-user multiple-input multiple-output scenarios, Channel State Information (CSI) is required at the Base Stations (BSs). For this purpose, Mobile Stations (MSs) report quantized CSI based on Grassmannian codebooks, that are common to MSs and BSs. Dep...

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Bibliographic Details
Published in2022 56th Asilomar Conference on Signals, Systems, and Computers pp. 225 - 229
Main Authors Blankenstein, Stephan, Jung, Peter, Bjelakovic, Igor, Thiele, Lars, Stanczak, Slawomir
Format Conference Proceeding
LanguageEnglish
Published IEEE 31.10.2022
Subjects
5G NR
Adaptive Quantization
Computers
CSI
Encoding
Frequency conversion
MIMO
Mobility
MU-MIMO
New Radio
OMP
Quantization (signal)
Throughput
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Summary:To support gains in frequency division duplex multi-user multiple-input multiple-output scenarios, Channel State Information (CSI) is required at the Base Stations (BSs). For this purpose, Mobile Stations (MSs) report quantized CSI based on Grassmannian codebooks, that are common to MSs and BSs. Depending on the speed of the MSs, the channel changes over time and CSI must be performed frequently to maintain good performance. To reduce the amount of overhead bits in the limited feedback channel, we developed a differential algorithm to track channel changes efficiently. Compared to independent CSI, the MS reports residuals of past feedback via sparse coding. The results show gains in the sum throughput compared to 5G New Radio Type II feedback solution while requiring less overhead at the same time.
ISSN:2576-2303
DOI:10.1109/IEEECONF56349.2022.10051982