"Sang Il Ko,Go Aikawa,Jun-ya Takayama,Shinji Ohyama","A High-Precision RF Time-of-Flight Measurement Method based on Vernier Effect for Localization of Wireless Sensor Networks",,"Sensors & Transducers",,"Vol. 135","No. 12","pp. 27/41",2011,Dec.
"高山潤也,KOSANG IL,大山真司","一般化バーニア効果とRF伝播時間計測への応用",,"計測自動制御学会論文集",,"Vol. 47","No. 12","pp. 597/605",2011,Dec.
"Jun-ya Takayama,Hong Phuoc Thanh,Sang Il Ko,Shinji Ohyama","Development of Prototype Sensor Nodes with High-accuracy Ranging for Localization on Wireless Sensor Networks","IEEE International Conference on Sensors 2011","IEEE International Conference on Sensors 2011",,,,"pp. 1986/1989",2011,Oct.
"西郷雄祐,Sang-il Ko,高山潤也,大山真司","異なる動作周波数を用いたTWRに基づくRF距離計測",,"第28回センシングフォーラム資料",,,,"pp. 243/248",2011,Oct.
"Sang Il Ko,Jun-ya Takayama,Shinji Ohyama","Proposal of Generalized Vernier Effect and Its Practical Advantage for RF Time-of-Flight Ranging between Sensor Nodes in Wireless Sensor Networks",,"Sensors & Actuators A",,"Vol. 167","No. 2","pp. 537/547",2011,Mar.
"Sang Il Ko,Jun-ya Takayama,Shinji Ohyama","Generalized Vernier Effect and its Application to Precise RF Time-of-Flight Measurement for Wireless Sensor Networks","IEEE International Conference on Sensors","Proceedings of IEEE International Conference on Sensors",,,,"pp. 2027-2032",2010,Nov.
"KO SANG IL,相川剛,高山潤也,大山真司","一般化したバーニア効果による高精度伝播時間計測と無線センサネットワークへの応用","第27回センシングフォーラム","第27回センシングフォーラム資料",,,,"pp. 177-181",2010,Sept.
"Sang Il Ko,Jun-ya Takayama,Shinji Ohyama","Synch-Free RF Time-of-Flight Measurement System for Wireless Sensor Networks Based on Vernier Effect","SICE Annual Conference 2010","Proceedings of SICE Annual Conference 2010",,,,"pp. 668-673",2010,Aug.
"Sang Il Ko,Jun-ya Takayama,Shinji Ohyama","Experimental Study on Time of Flight Measurement System Based on Vernier Effect","26th Sensor Symposium","Proceedings of the 26th Sensor Symposium",,,,"pp. 36-39",2009,Oct.
"高尚逸,高山潤也,大山真司","バーニア効果に基づくRF飛行時間計測のための基礎的研究","第26回センシングフォーラム","第26回センシングフォーラム資料",,,,"pp. 277-282",2009,Sept.
"Sang Il Ko,Jun-ya Takayama,Shinji Ohyama","Short range measurement using RF signal propagation time based on venier effect","ICCAS-SICE 2009","Proceedings of ICCAS-SICE",,,,"pp. 1956-1961",2009,Aug.
"Sang Il Ko,J. Takayama,S. Ohyama","A Novel RF Symmetric Double Sided Two Way Range Finder based on Vernier Effect","ICCAS 2008","Proceedings of ICCAS 2008",,,,"pp. 1802-1807",2008,Oct.