Passive Telemetry Sensor System using RLSE Based Real Time Estimation Technique with Optimal Forgetting Factor
Joon-Tark Lee, Kyung-Yup Kim · 한국지능시스템학회 학술발표 논문집 · 2004
In this paper, a passive telemetry RF capacitive humidity sensor system using a RLSE(Recursive Least Square Estimation) technique is proposed. To overcome these trouble problems such as a power limitation and a estimation complexity that the general passive telemetry sensor system including IC chip has, the principle of inductive coupling was applied to the modeling of a passive telemetry RF capacitive humidity sensor system and its capacitance was estimated by the RLSE algorithm. Specially, by introducing the optimal forgetting factor, we showed that the accuracy of its estimation was improved even in the time varying system and also the convergence time was reduced.