Elevation Effect on MIMO Channel Month 2002 doc.: IEEE 802.11-02/xxxr0 Nov 2003 Elevation Effect on MIMO Channel Qinghua Li qinghua.li@intel.com Jeng Lung jengx.c.lung@intel.com David Cheung david.b.cheung@intel.com Cliff Prettie clifford.w.prettie@intel.com Intel Corporation Qinghua Li, Intel John Doe, His Company

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

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

Measurement Locations with Three Elevations Month 2002 doc.: IEEE 802.11-02/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

Month 2002 doc.: IEEE 802.11-02/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

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

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

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