Transcript IEEE C802.16m-08/691r1

UL MIMO Structures for 16m
Document Number: C802.16m-08/691
Date Submitted:
2008-07-07
Source:
Jianjun.Li, Dongjun Lee, Rajagopal Iyengar, Jungnam Yun, Zhengzi Li, Jaehyeong Kim
Email: [email protected]
POSDATA Co, Ltd.
276-2, Seohyeon-dong, Bundang-gu, Seongnam-si,
Kyeonggi-do,463-775, Korea
Venue:
IEEE 802.16m-08/024 “Call for Contributions on Project 802.16m System Description Document (SDD)”, In response to the following
topics: “Uplink MIMO schemes”
Purpose:
To be discussed and adopted by TGm for the 802.16m SDD.
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Overview
 This contribution presents UL MIMO for 16m
 Here we proposed a UL MIMO structure with following characteristics
 Support 2 Tx antennas at MS side
 Support CL-SU MIMO for localized RB allocation for UL MIMO
 Hybrid SU-MIMO and MU-MIMO CSM for 4 Rx antennas at BS side
o Each MS work in SU-MIMO with 2 Tx antenna
o The whole UL is in CSM(MU-MIMO) by pairing 2 MS together with 4 Rx antennas
at the BS
 Support hybrid diversity mode and SM mode for CSM
o The MS with lower SINR work in diversity SU-MIMO mode
o The MS with higher SINR work in SM SU-MIMO Mode
 Support multiple codebook for CL-MIMO MS in CSM
Advantage of Proposed UL MIMO
Pros
• Support 2 Tx antennas at the MS;
 Increase peak data rate of UL for MS
• Support 2 MIMO Mode for 2 BS Rx antennas
 SU-MIMO Mode (Only 1 MS with 2 Tx antennas)
 MU-MIMO CSM mode(pair 2 MSs together with 1 Tx antennas)
SU-MIMO
CSM
Advantage of Proposed UL MIMO
Pros
• Support 4 Rx antennas at the BS;
 Increase peak data rate of UL for BS
• Support 2 MIMO Mode for 4 BS Rx antennas
 Hybrid SISO-MIMO CSM Mode
 1 MS with 2 Tx antennas. 2 MSs with 1 Tx antennas
 SU-MIMO CSM mode (pair 2 MSs together with 2 Tx antennas)
Hybrid SISO-MIMO CSM
SU-MIMO CSM
Advantage of Proposed UL MIMO
Pros
• SU-MIMO CSM;
 Diversity can be employed for MS with lower SINR
 SM can be employed for MS with higher SINR
Hybrid Diversity and SM Mode CSM
Full SM mode CSM
Advantage of Proposed UL MIMO
Pros
• Support Close Loop SU-MIMO for Localized RB;
 Unitary codebook based precoding for SU-MIMO
 Precoding matrix V of MS comes from an unitary codebook C
 Unitary codebook based precoding for SU-MIMO CSM
 Precoding matrix V1 of MS1 comes from an unitary codebook C
 Precoding matrix V2 of MS2 comes from an unitary codebook C
 Precoding matrix of the overall UL at the BS can be expressed by
Pros
 V1
o

o
V2 
• Support Multi-Mode codebook;
 Codebook size for SU-MIMO is N
 Codebook size for overall system of SU-MIMO CSM is N2
 SU-MIMO uses lager size codebook. SU-MIMO CSM uses smaller
one
Text Recommendations for SDD
Section 11 Physical Layer
Section 11.x UL MIMO structure
– UL MIMO has following characteristics
 Support 2 Tx antennas at MS side
 Support CL-SU MIMO for localized RB allocation for UL MIMO
 Hybrid SU-MIMO and MU-MIMO CSM for 4 Rx antennas at BS side
o Each MS work in SU-MIMO with 2 Tx antenna
o The whole UL is in CSM(MU-MIMO) by pairing 2 MS together with 4 Rx antennas
at the BS
 Support hybrid diversity mode and SM mode for CSM
o The MS with lower SINR work in diversity SU-MIMO mode
o The MS with higher SINR work in SM SU-MIMO Mode
 Support multiple codebook for CL-MIMO MS in CSM
o SU-MIMO can use larger size codebook
o SU-MIMO CSM should use small size codebook
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