d-2 along the direct path. Rician distributions for fast fading were derived in almost all squares of this room. The spectra for the fast fading envelope were also derived. From the propagation point of view, the results show that no extreme difficulty seems to exist in developing wireless communication systems in the 60 GHz band." />


Narrowband Experimental Study for Indoor Propagation Characteristics in the 60 GHz Band

Kazumasa TAIRA  Kazunori FUJIWARA  Takeshi MANABE  Mitsuhiko MIZUNO  Yoshinori KASASHIMA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E78-C   No.8   pp.1139-1145
Publication Date: 1995/08/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Issue on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
millimeter-wave band,  indoor propagation,  distance power law,  transmission loss,  fast fading,  

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Summary: 
An experimental study on propagation characteristics in a room of a modern office building using a 57.5 GHz carrier is described. The objective of the study is to provide initial information about the path-loss and fading characteristics for millimeter-wave wireless indoor communication systems. The area of the floor of the room is about 90 m2 and the room was almost empty with no furniture except the experimental apparatus. A wide-beam scalar feed horn transmission antenna and an omnidirectional receiving antenna were used and set to be with the same height. The measured area was divided into many "squares" to characterize the propagation. The variation of square transmission loss was calculated, and the regions where the maximum square transmission loss was observed were pointed out. It became clear that the distance power law for square transmission loss was approximately of the order d-2 along the direct path. Rician distributions for fast fading were derived in almost all squares of this room. The spectra for the fast fading envelope were also derived. From the propagation point of view, the results show that no extreme difficulty seems to exist in developing wireless communication systems in the 60 GHz band.