Internal calibration method for receiver system of a wireless location system
US6317081A · kind A · utility
117Cited by
29References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2000 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Jan 31, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An internal calibration method, used to calibrate a receiver system used in a wireless location system, comprises injecting a signal into the receiver system and utilizing the signal to obtain an estimate of the manner in which the transfer function of the receiver system varies across the bandwidth of the receiver system. This estimate is used to mitigate the effects of the variation of the transfer function on time measurements made by the receiver system. Such time measurements are used to locate mobile transmitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.