Transcription of 삼각측량법 - hakyongkim.net
1 2005 11 23 .. (RTLS) . (RSSI) .. 1. (Triangulation). (Triangulation) . RTLS 2 .. 2 ( 2 ..) 3 .. AP1, AP2, AP3 , AP ( x1 , y1 ), ( x 2 , y 2 ), ( x 3 , y 3 ) . M , ( x , y ) .. , M d 1 , d 2 , d 3 . (x3, y3). d3. d2. (x, y). (x1, y1) d1 (x2, y2). M . , d12 = ( x x1 ) 2 + ( y y1 ) 2 (1). d 22 = ( x x 2 ) 2 + ( y y 2 ) 2 (2). d 32 = ( x x3 ) 2 + ( y y 3 ) 2 (3).. , d 1 , d 2 , d 3 . , . (RSSI) , (TOA) (TDOA) . Copyright 2005 Hakyong KIM. All rights reserved. [ 1/3 ].. , d 1 , d 2 , d 3 . , . , ( x , y ) (1)~ (3) .. 2.
2 (RSSI. (RSSI). RSSI) .. 1 . , .. Friis . 4 d . L = 20 log 10 [dB] (4).. (4) Friis , . d . (4) d . L L. c d= 10 20 = 10 20 (5). 4 4 f . c f . , . 60dB 3 10 8 [m/sec] , . 1. d . 60. 3 10 8. d= 10 20 1000 = 10 [m]. 4 10 9.. , (1)~ (3) . ( x , y ) . 3. (TOA). (TOA) . 2 , .. (TOA) .. , . , = / . ( c = d / t ) . , .. 1. , . , . Copyright 2005 Hakyong KIM. All rights reserved. [ 2/3 ].. , t [sec] [ sec] . , [ sec] , 3 10 8. [m/sec] , d . d = c t = 3 10 8 10 6 = 60 [m].. , (1)~ (3) . ( x , y ) . 4.. [1] . , .. ( ) .. Copyright 2005 Hakyong KIM.
3 All rights reserved. [ 3/3 ].
