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EURASIP Journal on Wireless Communications and Networking
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EURASIP Journal on Wireless Communications and Networking
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EURASIP Journal on Wireless Communications and Networking
EURASIP Journal on Wireless Communications and Networking
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Blockage and directivity in 60 GHz wireless personal area networks
IEEE Journal on Selected Areas in Communications - Special issue on realizing GBPS wireless personal area networks
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Wireless Personal Communications: An International Journal
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Proceedings of the 6th International Wireless Communications and Mobile Computing Conference
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On 60 GHz wireless link performance in indoor environments
PAM'12 Proceedings of the 13th international conference on Passive and Active Measurement
Wireless Personal Communications: An International Journal
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This paper presents propagation measurements in the presence of human activity for a 60 GHz channel. Series of 40-min-long measurements of the channel impulse response have been recorded with a sampling period of 1.6 ms, for a total duration of about 20 h. During measurements, the human activity (between zero and 15 persons) was observed with a video camera. The obstruction phenomenon due to the human bodies is characterized in duration and amplitude from the propagation characteristics (attenuation, coherence bandwidth) by means of an appropriate method. The results highlight and quantify the problems due to the human activity for high data rate communication systems. When the direct path is shadowed by a person, the attenuation generally increases by more than 20 dB, for a median duration of about 100 ms for an activity of one to five persons and 300 ms for 11-15 persons. Globally, the channel is "unavailable" for about 1% or 2% of the time in the presence of one to five persons. This channel characterization makes it possible to modelize the temporal variations of the 60 GHz channels. The results also give orientations for the design of high data rate communications systems and networks architectures at 60 GHz.