Measurement and Analysis of Propagation Characteristics in Curved Subway Tunnel Environments 


Vol. 29,  No. 8, pp. 950-961, Aug.  2004


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  Abstract

In this paper, we measured and analyzed propagation characteristics in a subway tunnel that is recectly increasingly becoming beeoming one of the iadio communication environments The measurements are carried out in a subway tunnel with frequency bands of 245GHz and 58Gz The length of tunnel we used for this study is 175m of LOS (Line-of-sight) and 270m of NLOS(Non Line-of-Sight) The subway tunnel is cuived and its cross section is horseshoe type The measurement system we employ in this study are a narrow-band system and a wide-band system The narrow-band system is used to get path loss measurement and the wide-band system is used to figure out delay profile measurement In partucular, the wide-band system consists of 1023 length PN sequence generator using a chip rate of 80MHz basd on a sliding correlation technique The omni-directional antennas and direetional anatennas are used to analyzc propapation characteristics for beam type of antenne The path loss displays only puie path loss of a tunnel enviromment The delay profile indicates the mean excess delay and RMS (Root mean squaie) delay spread.

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  Cite this article

[IEEE Style]

H. D. Jung, N. J. Park, Y. J. Kang, M. K. Song, "Measurement and Analysis of Propagation Characteristics in Curved Subway Tunnel Environments," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 8, pp. 950-961, 2004. DOI: .

[ACM Style]

Heoi Dong Jung, Noh Joon Park, Young Jin Kang, and Moon Kyou Song. 2004. Measurement and Analysis of Propagation Characteristics in Curved Subway Tunnel Environments. The Journal of Korean Institute of Communications and Information Sciences, 29, 8, (2004), 950-961. DOI: .

[KICS Style]

Heoi Dong Jung, Noh Joon Park, Young Jin Kang, Moon Kyou Song, "Measurement and Analysis of Propagation Characteristics in Curved Subway Tunnel Environments," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 8, pp. 950-961, 8. 2004.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880