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The impact of highly reflective ceilings on wireless systems in occupied open plan offices

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3 Author(s)
Lee, D.C.K. ; Dept. of Electr. & Comput. Eng., Auckland Univ., New Zealand ; Sowerby, K.W. ; Neve, M.J.

Improving the reliability and coverage of indoor wireless systems is an important design goal. A highly reflective ceiling creates an elevated image of the access point, which delivers a strong and reliable multipath component to the mobile terminal. Measurement results show that a small area of metallic ceiling above the transmitter can provide significant enhancement to the received signal power across a large room. Experiments with human bodies obstructing the line-of-sight path were performed to further examine the effectiveness of such an architectural modification. The improvement can be as high as 6.5 dB in cases where the line-of-sight path is obstructed by a human body. Moreover, the effectiveness of the metallic ceiling does not diminish with the distance from the transmitter. A comparison of measured and simulated results shows that ray tracing simulation can adequately approximate the results observed by measurement at 5.8 GHz.

Published in:

Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on  (Volume:3 )

Date of Conference:

5-8 Sept. 2004

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