1. doc.: IEEE 802.11-03/895r0 SubmissionSlide 1David Cheung, Intel Ricean K-Factor in Office Cubicle Environment David Cheung david.b.cheung@intel.com Cliff Prettie clifford.w.prettie@intel.com Qinghua Li qinghua.li@intel.com Jeng Lung jengx.c.lung@intel.com Intel Corporation November 2003

2. doc.: IEEE 802.11-03/895r0 SubmissionSlide 2David Cheung, Intel Measurement Setup and Analysis Office cubicle environment 7 different STA locations, 3-19m distance, 2 in hard-wall conference room 11 different sets of data –Each set contains 1369 different antenna positions, 37x37 array with ½ spacing –Channel transfer function spans 2-8 GHz K-factor based on strongest average tap in 100 MHz (5.15-5.25 GHz and 5.25-5.35 GHz) using moment-method estimation [1]

3. doc.: IEEE 802.11-03/895r0 SubmissionSlide 3David Cheung, Intel Measurement Locations

4. doc.: IEEE 802.11-03/895r0 SubmissionSlide 4David Cheung, Intel K-Factors for Various Locations Set # Perspective STA Location Distance(m)LOS/NLOS K factor (dB) 1APS13LOS-3.56 1STAS13LOS-6.24 2STAS219NLOS- 3APS411NLOS-3.86 4APS513NLOS- 5APS1213NLOS- 5STAS1213NLOS-4.18 6APS1312NLOS-1.11 6STA, conf.S1312NLOS- 7APS208.5NLOS-2.23 7STAS208.5NLOS-5.71

5. doc.: IEEE 802.11-03/895r0 SubmissionSlide 5David Cheung, Intel Conclusions Ricean K-factor is small (< -1 dB) in office cubicle environment Small K-factor attributed to large number of scatterers and 10 ns time resolution –Many paths have excess delay of <10 ns –These paths combine in first tap

6. doc.: IEEE 802.11-03/895r0 SubmissionSlide 6David Cheung, Intel References [1] Greenstein, Michelson, and V. Erceg, Moment-Method Estimation of the Ricean K-Factor, IEEE Communications Letters, Vol. 3, No. 6, June 1999, pp. 175-176.