WF on 4Tx UL Codebook For CP-OFDM

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Presentation transcript:

WF on 4Tx UL Codebook For CP-OFDM 3GPP TSG RAN1 #91 Reno, USA, November 27th – December 1st, 2017 Agenda item – 7.2.1.2 R1-17nnnnn WF on 4Tx UL Codebook For CP-OFDM

Background Partial coherence/full coherence is a UE capability. The only coherence category with guaranteed support from every UE is “non-coherence”. It is imperative that NR UL MIMO not depending on UE capability/optional feature is robustly supported. Codebook design for non-coherence is of high importance and should not be compromised.

Overview (1) # Precoders vs. Coherence transmission Capability Transmission Rank Full Coherence Partially Coherent Non Coherent Rank 1 16 8 4 Rank 2 6 Rank 3 Rank 4 1

Overview (2) Total Number of codewords and signaling overhead according to Coherence Transmission Capability and Rank restriction With rank restriction Full Coherence Partially Coherent Non Coherent Rank 1 28 (5 bits) 12 (4 bits) 4 (2 bits) Ranks 1-2 50 (6 bits) 26 (5 bits) 10 (4 bits) Ranks 1-3 58 (6 bits) 30 (5 bits) 14 (4 bits) Ranks 1-4 63 (6 bits) 31 (5 bits) 15 (4 bits)

Proposal: Rank 1

Proposal: Rank 2

Proposal: Rank 3

Proposal: Rank 4