1. Elevation Effect on MIMO Channel
Month 2002
doc.: IEEE /xxxr0
Nov 2003
Elevation Effect on MIMO Channel
Qinghua Li
Jeng Lung
David Cheung
Cliff Prettie
Intel Corporation
Qinghua Li, Intel
John Doe, His Company

2. Outline Measurement setup Channel capacity Angular spread Conclusion
Nov 2003
Outline
Measurement setup
Channel capacity
Angular spread
Conclusion
Qinghua Li, Intel

3. Measurement Setup Typical office environment 2.4 and 5.2 GHz band
Nov 2003
Measurement Setup
Typical office environment
2.4 and 5.2 GHz band
2 inch antenna spacing
9 x 9 MIMO channel
Access point is set at three height levels, 1.1 m, 1.7m, and 2.3 m
Qinghua Li, Intel

4. Measurement Locations with Three Elevations
Month 2002
doc.: IEEE /xxxr0
Nov 2003
Measurement Locations with Three Elevations
10.2 m
5.6 m
9.1 m
11 m
Qinghua Li, Intel
John Doe, His Company

5. Month 2002
doc.: IEEE /xxxr0
Nov 2003
Channel Capacity
Normalize mean received power to remove shadowing for each elevation
4 x 4 channel capacity is computed at SNR 15 dB
Capacity varies from 1.6% to 10.5% as elevation changes
Qinghua Li, Intel
John Doe, His Company

6. Capacity Comparison at Location S39
Nov 2003
Capacity Comparison at Location S39
Qinghua Li, Intel

7. Angle Spread of Cluster
Nov 2003
Angle Spread of Cluster
Perspective
# of Sets
# of Clusters
Avg # of Clusters
Mean (degrees) AP 22 33
1.5
20.6
STA 12 28
2.3
25.7
STA, conf. 4 13
3.3
42.0
All 38 74
1.9
26.3
Qinghua Li, Intel

8. Conclusion Elevation changes channel capacity by 1-10%
Nov 2003
Conclusion
Elevation changes channel capacity by 1-10%
Angular spread at access point is about 5o less than that at station
Access point sees slightly fewer clusters than that of station
Elevation effect is small
Qinghua Li, Intel