文摘
Development and testing of a simple, low-cost ILS system based on a simple Direction Finder (DF) that uses relative RSS levels for AoA estimation, and the absolute RSS levels for range estimation. Capability of providing positioning information with a single sensing unit, with a relative error of 26% (85% confidence level). Accuracy can be improved by adding more sensing units. Accuracy is improved by adding a second sensing unit: 14.5% relative error (90% confidence level). Use of multiple RFID tags attached to the asset or person to be tracked to enhance detection, reducing RSS fluctuations due to multipath.