Transcript IEEE C802.16m-09/1312

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
Date Submitted:
2009-07-06
Source:
Alexei Davydov, Roshni Srinivasan, Huaning Niu ,
Apostolos Papathanassiou, Yuan Zhu,
Guangjie Li, Qinghua Li, Yang-seok Choi
Intel Corporation
Venue:
IEEE 802.16m Session#62, San Francisco, USA
Category: AWD comments / Area: Chapter 15.3.6 (DL-CTRL)
“Comments on AWD 15.3.6 (DL-CTRL)”
Base Contribution:
IEEE C80216m-09/1312
Purpose:
Discussion
Notice:
[email protected]
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Introduction
• In this contribution we compare link level
performance of MLD and MMSE receiver in MUMIMO mode using ZF precoding
ZF-Forcing Precoding
• Zero-Forcing precoding procedure at the BS
– Construct the initial precoding matrix for the reported PMIs
V  c1 , c 2 ,..., c N 
– Calculate of ZF precoding vectors at the BS

W  w1 , w 2 ,..., w N   V  V V
H

1
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
4x2 ZF MU-MIMO, CB (4,1,6), UMa-NLOS (3kmph), TX ant sp.= 10 
0
10
PER
MLD QPSK R=0.6574
MLD 16QAM R=0.6713
MLD 64QAM R=0.7191
MMSE QPSK R=0.6574
MMSE 16QAM R=0.6713
MMSE 64QAM R=0.7191
MF QPSK R=0.6574
MF 16QAM R=0.6713
MF 64QAM R=0.7191
-1
10
-2
10
-10
-5
0
5
10
SNR, dB
15
20
25
30
MCS-1 NLOS TX ant. sp. = 0.5
4x2 ZF MU-MIMO, CB (4,1,6), UMa-NLOS (3kmph), TX ant sp.= 0.5 
0
10
PER
MLD QPSK R=0.6574
MLD 16QAM R=0.6713
MLD 64QAM R=0.7191
MMSE QPSK R=0.6574
MMSE 16QAM R=0.6713
MMSE 64QAM R=0.7191
MF QPSK R=0.6574
MF 16QAM R=0.6713
MF 64QAM R=0.7191
-1
10
-2
10
-10
-5
0
5
10
SNR, dB
15
20
25
30
MCS-2 NLOS TX ant. sp. = 10
4x2 ZF MU-MIMO, CB (4,1,6), UMa-NLOS (3kmph), TX ant sp.= 10 
0
10
PER
MLD QPSK R=0.7407
MLD 16QAM R=0.7593
MLD 64QAM R=0.8086
MMSE QPSK R=0.7407
MMSE 16QAM R=0.7593
MMSE 64QAM R=0.8086
MF QPSK R=0.7407
MF 16QAM R=0.7593
MF 64QAM R=0.8086
-1
10
-2
10
-10
-5
0
5
10
SNR, dB
15
20
25
30
MCS-2 NLOS TX ant. sp. = 0.5
4x2 ZF MU-MIMO, CB (4,1,6), UMa-NLOS (3kmph), TX ant sp.= 0.5 
0
10
PER
MLD QPSK R=0.7407
MLD 16QAM R=0.7593
MLD 64QAM R=0.8086
MMSE QPSK R=0.7407
MMSE 16QAM R=0.7593
MMSE 64QAM R=0.8086
MF QPSK R=0.7407
MF 16QAM R=0.7593
MF 64QAM R=0.8086
-1
10
-2
10
-10
-5
0
5
10
SNR, dB
15
20
25
30
Conclusions
• MLD shows remarkable gains over MMSE for ZF MUMIMO mode
• Support of MLD for MU-MIMO in DL A-MAP is required