Performance Evaluation of Transformation Codebook for 8TX IEEE Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-09/2731 Date Submitted: Source: Jiann-An Tsai Jerry Pi David Mazzarese Samsung Electronics Venue: Re : m amendment working document Base Contribution: IEEE C802.16m-09/2731 Purpose: To discuss in the revision of the m AWD (P802.16m/D3) 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. 1

Background Current AWD on transformation codebook is defined in Transformation codebook based feedback mode In current AWD, the feedback overhead on direct reporting correlation matrix for transformation codebook is – 6 bit for 2TX, 28 bits for 4TX, 120 bits for 8TX This contribution provides a low feedback scheme for 8TX transformation codebook based on the method of tracking correlation matrix Contribution C80216m-09_2730 provides text that defines the usage of tracking correlation matrix This contribution provides system level and link level simulation results of the proposal as in C80216m-09_2730 2

Link Performance for 8 TX transformation codebook (Subband)

Link level simulation Simulation configuration – Geometry simulated:[5,0,5, 10 15] dB – Downlink, 8TX antenna – Wideband correlation reporting on correlation matrix – 16 MCS level – Closed-loop – 10 MHz – SCM Macro Urban – Sub-band PMI feedback-4PRU (Proposed) – Wideband R feedback (Current AWD) – Calibrated No delay among 8TXs – Un-calibrated 1 random delay sample among 8TXs 2 random delay samples among 8TXs 3 random delay samples among 8TXs Compared cases: – Direct Quantized R Reporting on correlation matrix – Tracking of correlation matrix with/without random vector 4

8 TX –Link Performance ( Calibrated)

8 TX – Link Performance ( 1 random delay sample among 8TXs)

8 TX – Link Performance ( 2 random delay sample among 8TXs)

System level simulation-MU MIMO Comparison: – Direct Reporting R on correlation matrix – Tracking on correlation matrix with/without random vector System simulation configuration: – System topology: 19 cells / 57 sectors wrap-around – MIMO configuration: 8Tx, 2Rx – MU-MIMO transmission – System bandwidth: 10MHz – sub-band PMI feedback-4PRU – Wideband R feedback – Receiver: LMMSE – Scheduling: Proportional Fair – 16MCS level – 4/12 mobile stations – 10MHz – Up to max. 4 streams is scheduled – Un-calibrated 1 random delay sample among 8TXs 8

8 TX –MU MIMO System Performance Sector Throughput

8 TX –MU MIMO System Performance Cell edge Throughput