Name
Abstract | ||
|---|---|---|
An asynchronous position measurement system is proposed for indoor localization in this paper. The demonstrated system consists of a UWB transmitter and several energy detection receivers whose positions are known. The position measurement process starts with the locator emitting a UWB pulse. Upon arrival, the pulse is amplified and retransmitted by the target to be located. Signals from both the locator and the target are captured by the receivers. No synchronization mechanism is implemented. Instead, the proposed system measures the differential TOA between the direct coupling signal of the locator and the target signal. Together with the knowledge of the locator transmitter and receiver positions, the absolute range that the pulse travels can be calculated. The sum of transmitter-target range and target-receiver range defines an ellipse and the target resides on the intersections of several such ellipses. It is shown via the Cramer-Rao lower bound that the absolute-range-based elliptical localization is potentially more accurate than the relative-range-based hyperbolic localization. Our proposed system is able to achieve positioning error bound comparable to synchronous absolute-range-based localization systems while eliminating the cost of synchronization. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1109/TIM.2010.2049185 | IEEE T. Instrumentation and Measurement |
Keywords | Field | DocType |
position measurement process,target-receiver range,radio transmitters,differential toa,asynchronous position measurement,uwb transmitter,cramer-rao lower bound,absolute range,time-of-arrival (toa),transmitter-target range,ultra wideband communication,range measurement,indoor elliptical localization,ultra wideband (uwb),asynchronous uwb range measurement,synchronization,direct coupling signal,energy detection receiver,position measurement,time-of-arrival estimation,positioning error,cramer rao lower bound,accuracy | Cramér–Rao bound,Transmitter,Asynchronous communication,Direct coupling,Synchronization,System of measurement,Upper and lower bounds,Electronic engineering,Ellipse,Mathematics | Journal |
Volume | Issue | ISSN |
60 | 1 | 0018-9456 |
Citations | PageRank | References |
14 | 0.63 | 9 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yuan Zhou | 1 | 22 | 1.23 |
| Choi Look Law | 2 | 89 | 12.49 |
| Yong Liang Guan | 3 | 2037 | 163.66 |
| Francois P. S. Chin | 4 | 330 | 47.00 |