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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) NLOS ½Ç³» ȯ°æ ÇÏ¿¡¼­ ÃøÀ§ Á¤È®µµ °³¼±À» À§ÇÑ EMA ÇÊÅÍ Àû¿ë ÀûÀÀÀû ½ÅÈ£ ¸ðµ¨ ±â¹Ý À§Ä¡ ¼¾½Ì ¼Ö·ç¼Ç
¿µ¹®Á¦¸ñ(English Title) High Accuracy Indoor Location Sensing Solution based on EMA filter with Adaptive Signal Model in NLOS indoor environment
ÀúÀÚ(Author) ÇÏ°æ¿í   Â÷¸íÈÆ   ±èµ¿¿Ï   Kyunguk Ha   Myeonghun Cha   Dongwan Kim  
¿ø¹®¼ö·Ïó(Citation) VOL 23 NO. 07 PP. 0852 ~ 0860 (2019. 07)
Çѱ۳»¿ë
(Korean Abstract)
º» ³í¹®¿¡¼­´Â ½Ç³» ȯ°æ¿¡¼­ blind ³ëµå°¡ À̵¿Çϰųª ¿òÁ÷ÀÌ´Â Àå¾Ö¹° (ex. »ç¶÷)·Î ÀÎÇÏ¿© RSSI°¡ ±Þ°ÝÈ÷ º¯ÇÏ´õ¶óµµ Á¤È®ÇÑ blind ³ëµå ÃøÀ§¸¦ °¡´ÉÇÏ°Ô ÇÏ´Â exponential moving average (EMA) ÇÊÅÍ Àû¿ë ÀûÀÀÀû ½ÅÈ£ ¸ðµ¨ ±â¹Ý »ïº¯Ãø·®±â¹ýÀ» Á¦¾ÈÇÑ´Ù. Á¦¾ÈµÈ EMA ÇÊÅÍ Àû¿ë ÀûÀÀÀû ½ÅÈ£ ¸ðµ¨ ±â¹Ý »ïº¯Ãø·®±â¹ýÀº °íÁ¤µÈ ¼¼ °³ÀÇ ÀüÆÄ ¼Û½Å ³ëµå¿Í blind ³ëµå °£ ¾ò¾îÁø RSSI¸¦ ÅëÇØ blind ³ëµåÀÇ À§Ä¡¸¦ ÃøÁ¤ÇÑ´Ù. ¶ÇÇÑ ¿ÜºÎ ȯ°æ ¿äÀÎÀ¸·Î ÀÎÇØ RSSI°¡ ±Þ°ÝÈ÷ º¯È­ÇÒ °æ¿ì non-LOS (NLOS) ȯ°æÀÎ °ÍÀÎÁö ȤÀº blind ³ëµåÀÇ À̵¿À¸·Î ÀÎÇÑ RSSI º¯È­ÀÎÁö¸¦ ÆǺ°ÇÑ´Ù. Blind ³ëµå¿Í ÀüÆÄ ¼Û½Å ³ëµå »çÀÌ °æ·Î°¡ NLOS ȯ°æÀÌ µÇ¾ú´Ù°í ÆÇ´ÜµÉ °æ¿ì LOS ȯ°æ¿¡¼­ ÃøÁ¤µÈ RSSI¸¦ ±â¹ÝÀ¸·Î NLOS ȯ°æ¿¡¼­ ÃøÁ¤µÈ RSSI¸¦ º¸Á¤ÇÏ¿© blind ³ëµåÀÇ ÁÂÇ¥¸¦ µµÃâÇÏ°í, blind ³ëµå°¡ À̵¿ÇÏ¿´´Ù°í ÆÇ´ÜµÈ´Ù¸é ½Ç½Ã°£ ÃøÁ¤µÈ RSSI¸¦ ÀÌ¿ëÇÏ¿© blind ³ëµåÀÇ ÁÂÇ¥¸¦ µµÃâÇÑ´Ù. Á¦¾È ±â¹ýÀº ZigBee ±â¹Ý testbed¸¦ ÅëÇØ °ËÁõÇÏ¿´À¸¸ç, NLOS ȯ°æ ȤÀº blind ³ëµå°¡ À̵¿Çϴ ȯ°æ ÇÏ¿¡¼­ ±âÁ¸ ±â¹ý ´ëºñ °³¼±µÈ À§Ä¡ ÀÎ½Ä Á¤È®µµ¸¦ °¡ÁüÀ» Áõ¸íÇÏ¿´´Ù.
¿µ¹®³»¿ë
(English Abstract)
In this paper, we proposed a new trilateration technique based on exponential moving average (EMA) filter with adaptive signal model which enhances accuracy of positioning system even if the RSSI changes randomly due to movement of obstacles or blind node in indoor environment. In the proposed scheme, three fixed transmitters sent out the signal to blind node. The transmitter decides the location of the blind node based on RSSI and it estimates the cause of RSSI fluctuation which is interference of obstacle or movement of blind node. When the path between blind node and transmitter has become NLOS path because of obstacles, the transmitter ignores the measured RSSI in NLOS path and replace estimated RSSI in LOS environment. In the other case, the transmitter updated the new RSSI to represent of movement of blind node. The proposed scheme has been verified on a ZigBee testbed and we proved the improved positioning accuracy compared to the existing indoor position system.
Å°¿öµå(Keyword) ½Ç³» À§Ä¡ ÀÎ½Ä ½Ã½ºÅÛ   »ïº¯Ãø·®±â¹ý   »ç¹°ÀÎÅͳݠ  ¼ö½Å½ÅÈ£¼¼±â   Indoor Positioning System   Trilateration technique   Internet of Things   Received signal strength Indicator  
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