Measurement of Hot-Spot Zones for Design of Wide-Band Systems at 70-GHz


IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E87-A    No.10    pp.2657-2667
Publication Date: 2004/10/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Wide Band Systems)
70 GHz,  indoor propagation,  hot spot,  delay profile,  delay spread,  lobby,  train,  

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The 70-GHz band propagation characteristics of two different hot-spot zones are measured and analyzed: (1) a transmitter fixed to a ceiling servicing the area beneath it (type A), and (2) a transmitter fixed to a wall servicing the area in front of it (type B). Measurements were made in two different settings, a lobby and a train. The results show that zone B produces a smaller delay spread in relation to distance. A comparison of the use of vertical and circular polarization shows that circular polarization produces a smaller delay spread in the type B zone. The results also indicated that the function of the delay spread value for the distance in a lobby and train in type B zone.