Location measurement process for radio-frequency badges employing path constraints

摘要: A process for measuring the location of people and objects carrying radio frequency (RF) transmitters (TXs) that transmit messages to a plurality RF receivers (RXs) located in space. Each RX is communication with computer network forwards data received from TXs via its associated computer, along value indicating signal strength TX transmission. The strengths attributable same transmission are used form locating vector which then compared exemplary vectors generated readings gathered calibration procedure set representative locations In comparing vectors, constraints enforced on movements between (e.g., cannot pass through walls) probabilistically enforce expectations transitions locations.