Sounding Antenna Switching for IEEE 802.16m Amendment Working Document IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C80216m-0848.

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Sounding Antenna Switching for IEEE m Amendment Working Document IEEE Presentation Submission Template (Rev. 9) Document Number: IEEE C80216m-0848 Date Submitted: Source: KeunChul Hwang, Yongseok Kim, Seungwon Kang, Inseok Hwang, Soon Young Yoon Samsung Electronics Alexei Davydov Intel Corporation Venue: IEEE m Session#61, Cairo, Egypt Base Contributions: N/A Re:Call for Contributions on Project m Amendment Working Document (AWD) Content Purpose: To discuss and adopt in TGm 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.

Motivation In current AWD text(80216m-09_0010r1a), sounding antenna switching is determined to be supported, but the details is TBD. This contribution intends to specify the details for supporting sounding antenna switching

Simulation Parameters ParameterAssumption Cell ConfigurationHexagonal grid, 19 Cell sites, 3 sectors per site Path loss model Loss (dB) =  log 10 (R) (R in km) Site-to-Site Distance1.5 km Carrier Frequency2.5 GHz Bandwidth10Mhz BS Tx Power46dBm BS Tx / MS Rx antenna 4Tx (ULA 4 ) / 2 Channel ModelSCM Urban Macro 3km/h Sounding MultiplexingCDM (P = 18) Multi target PCON (4 class) Number of Simultaneous Sounding User Per Sector4 Number of Users Per Sector16 Sounding Channel Delay for generating ZF weighting –Single antenna(1Tx) : 1 frame delay for fixed single antenna –Multi antenna(2Tx) : 1 frame delay for 2 antenna –Antenna switching : 1frame delay for one antenna and 2 frame delay for another antenna

Simulation Results DL MIMO performance according to sounding antenna configuration –DL 4 x 2 ZF MU-MIMO with sounding Sector Throughput Enhancement Single Antenna (1Tx) Sounding100 % (ref.) Multi Antenna (2Tx) Sounding112 % Antenna Switching Sounding114 %

Proposed Antenna Switching Proposed Scheme and Operation Example –Scheme: For sounding with antenna switching, the AMS shall transmit sounding symbol with the ith antenna (0, 1, …, N t  1) on frames n = j  T+i, where n = 0 corresponds to the frame where UL sounding command A-MAP IE is received, T is periodicity in UL sounding command A-MAP IE, and j is a running index ( j = 0, 1, 2, … for T  0 and j = 0 for T  = 0). For sounding with antenna switching and periodical sounding allocation (T  0), the assigned periodicity T shall be larger or equal to the number of AMS transmit antennas N t. –Operation Example N t = 2, periodicity = 4

Adopt the following proposed text in line 9, page 119 (section in 80216m-09_0010r1a) Multiplexing for multi-antenna and multi-AMS The uplink sounding channels of multiple AMS and multiple antennas per AMS can be multiplexed through [Option 1: decimation separation or cyclic shift separation][Option2: decimation separation] in each sounding allocation. Also, in case of multiple UL subframes for sounding, time division separation can be applied by assigning different AMS to different UL subframe. For cyclic shift separation each AMS occupies all subcarriers within sounding allocation and uses the different sounding waveform [Editor's note: remove this sentence if Option 2 will be adopted]. For frequency decimation separation each AMS uses decimated subcarrier subset from the sounding allocation set with different frequency offset. For antenna switching capable AMS and multi-antenna AMS, ABS can command the AMS to switch the physical transmit antenna(s) for sounding transmission. The details for supporting antenna switching on sounding is TBD. For sounding with antenna switching, the AMS shall transmit sounding symbol with the ith antenna (0, 1, …, N t  1) on frames n = j  T+i, where n = 0 corresponds to the frame where UL sounding command A-MAP IE is received, T is periodicity in UL sounding command A-MAP IE, and j is a running index ( j = 0, 1, 2, … for T  0 and j = 0 for T  = 0). For sounding with antenna switching and periodical sounding allocation (T  0), the assigned periodicity T shall be larger or equal to the number of AMS transmit antennas N t. Proposed Remedy