MLD Performance for CL MU-MIMO with ZF precoding (AWD -15.3.6) IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C80216m-09/1312.

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MLD Performance for CL MU-MIMO with ZF precoding (AWD ) IEEE Presentation Submission Template (Rev. 9) Document Number: IEEE C80216m-09/1312 Date Submitted: Source: Alexei Davydov, Roshni Srinivasan, Huaning Niu, Apostolos Papathanassiou,Yuan Zhu, Guangjie Li, Qinghua Li, Yang-seok Choi Intel Corporation Venue: IEEE m Session#62, San Francisco, USA Category: AWD comments / Area: Chapter (DL-CTRL) “Comments on AWD (DL-CTRL)” Base Contribution: IEEE C80216m-09/1312 Purpose: Discussion Notice: This document does not represent the agreed views of the IEEE Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and. Further information is located at and.

Introduction In this contribution we compare link level performance of MLD and MMSE receiver in MU- MIMO mode using ZF precoding

ZF-Forcing Precoding Zero-Forcing precoding procedure at the BS –Construct the initial precoding matrix for the reported PMIs –Calculate of ZF precoding vectors at the BS non unitary precoding matrix

Simulation Settings MCS sets: –MCS Set #1 – QPSK, 16QAM and 64QAM with medium code rates –MCS Set #2 - QPSK, 16QAM and 64QAM with high code rates Channel Models: –UMa-nLOS (0.5 TX ant. sp.) – highly correlated channel –UMa-nLOS (10 TX ant. sp.) – uncorrelated channel –MS speed: 3kmph Receivers: MF (MRC), MMSE, MLD

MCS-1 NLOS TX ant. sp. = 10

MCS-1 NLOS TX ant. sp. = 0.5

MCS-2 NLOS TX ant. sp. = 10

MCS-2 NLOS TX ant. sp. = 0.5

Conclusions MLD shows remarkable gains over MMSE for ZF MU- MIMO mode Support of MLD for MU-MIMO in DL A-MAP is required