On the Performance Analysis of Different Selecting Strategies for Type-II Codebook

The Type-II codebook is standardized in recent 5G new radio (NR) physical layer release, which supports high resolution channel state information feedback for MIMO transmission. In this paper, we focus on selecting strategies for rank2 Type-II precoder matrix. Firstly, We extend a rank1 solution in...

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Bibliographic Details
Published in:European Conference on Networks and Communications (Online) pp. 83 - 88
Main Authors: Fu, Xiaotian, Ruyet, Didier Le, Visoz, Raphael, Clessienne, Thierry
Format: Conference Proceeding
Language:English
Published: IEEE 07.06.2022
Subjects:
3GPP
5G mobile communication
5G NR MIMO
Correlation
CSI feedback
Degradation
Physical layer
Quantization (signal)
Search problems
Simulation
Type-II codebook
ISSN:2575-4912
Online Access:Get full text
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Summary:The Type-II codebook is standardized in recent 5G new radio (NR) physical layer release, which supports high resolution channel state information feedback for MIMO transmission. In this paper, we focus on selecting strategies for rank2 Type-II precoder matrix. Firstly, We extend a rank1 solution in the literature to rank2 which is referred to approach1. This approach is subject to its prerequisite which wastes certain feedback bits. To further exploit the feedback bits, we proposed a new selecting strategy, named approach2. Besides, we illustrate that the subband scalar quantization restricted by the standard deteriorates both the orthogonality and the beamforming gains of the rank2 precoder matrices which has varying influence on approaches. Lastly, the simulation results show that the approach2 is more efficient than the approach1 in high and medium correlation channel cases, which is the opposite in the low correlation case.
ISSN:2575-4912
DOI:10.1109/EuCNC/6GSummit54941.2022.9815725