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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) IEEE 802.11 ¹«¼±·£À» À§ÇÑ ÁöÇÏö ÅͳΠȯ°æ¿¡¼­ ´Ù¾çÇÑ ÁöÇ⼺ ºöÀÇ ÀüÆÄÃøÁ¤
¿µ¹®Á¦¸ñ(English Title) Propagation Measurements of Various Directional Beam in Subway funnel Environments for IEEE 802.11 Wireless LAN
ÀúÀÚ(Author) ¹Ú³ëÁØ   ¼Û¹®±Ô   °­¿µÁø   Noh Joon Park   Moon Kyou Song   Young Jin Kang  
¿ø¹®¼ö·Ïó(Citation) VOL 08 NO. 02 PP. 0232 ~ 0238 (2004. 04)
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(Korean Abstract)
º» ³í¹®¿¡¼­´Â °¢°¢ 2.4§× ´ë¿ª°ú 5.8§× ´ë¿ª¿¡¼­ ÆÒºö ¾ÈÅ׳ª, ¿øÇüÆíÆÄ ¾ÈÅ׳ª ±×¸®°í ÁöÇ⼺ ¾ÈÅ׳ª¸¦ »ç¿ëÇÏ¿© ÁöÇÏö Åͳο¡¼­ÀÇ ÀüÆÄ Æ¯¼ºÀ» ½ÇÇèÇÏ¿´´Ù. Çù´ë¿ª ä³Î ÃøÁ¤ÀÇ °Ý°ú, NLOS (Non-Line-Of-Sight) °æ·Î¿¡¼­ ¼ö½ÅÀü·Â ·¹º§ÀÌ LOS(Line-Of-Sight)¿¡ ºñÇÏ¿© ±Þ°ÝÈ÷ °¨¼ÒÇÔÀ» º¸¿´´Ù. ±¤´ë¿ªÃ¤³Î ÃøÁ¤Àº PN sliding correlation ¹æ¹ýÀ» »ç¿ëÇÏ¿© ¼öÇàÇÏ¿´´Ù. 2.4§× ´ë¿ª°ú 5.8§× ´ë¿ªÀ» Æ÷ÇÔÇÏ´Â IEEE 802.11 ¹«¼±·£ ´ë¿ª¿¡¼­ ´Ù¾çÇÑ ÁöÇ⼺ ºö¿¡ ´ëÇÑ Æò±ÕÃÊ°úÁö¿¬(mean access delay)°ú RMS Áö¿¬È®»ê(RMS delay spread) µîÀÇ Ã¤³Î ÆĶó¹ÌÅ͸¦ ºñ±³ÇÏ¿´´Ù.
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(English Abstract)
In this paper, radio propagation in a subway tunnel is investigated using fan beam antennas, circular polarization antennas and directional antennas at 2.4§× and 5.8§× band, respectively. The results of narrowband channel measurements show that received power level for NLOS(Non-Line-Of-Sight) path is decreased drastically as compared with LOS(Line-Of-Sight) path. Wideband channel measurements are obtained using a PN sliding correlation method. The parameters of the channel such as mean access delay and RMS delay spread are compared as to different types of directional beam at IEEE 802.11 WLAN(Wireless Local Area Network) band including 2.4§× and 5.8§× bands, respectively.
Å°¿öµå(Keyword) Wireless LAN   Tunnel   PN sliding correlation   Propagation Measurements  
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