Explicit CSI Feedback Design for 5G New Radio phase II

Conference: WSA 2018 - 22nd International ITG Workshop on Smart Antennas
03/14/2018 - 03/16/2018 at Bochum, Deutschland

Proceedings: ITG-Fb. 276: WSA 2018

Pages: 5Language: englishTyp: PDF

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Ahmed, Rana; Wild, Thorsten (Nokia Bell Labs, Stuttgart, Germany)
Visotsky, Eugene (Nokia Bell Labs, Arlington Heights, USA)

Massive multiple input multiple output (MIMO) systems are expected to boost the data throughput and reliability in future 5G systems. In order to enable advanced radio concepts in New Radio (NR) phase II, such as multiple transmit receive point (multi-TRP) transmission, accurate channel state information (CSI) knowledge at gNB side is essential. This paper provides a practical explicit CSI feedback scheme, which exploits time domain channel sparsity. A heuristic greedy algorithm is used to discover the channel support and feed it back to the gNB. Simulation results comparing the proposed approach against recently standardized NR phase I Type II CSI feedback, show an improved performance for the proposed design.