Electronic tracking and ranging system
US7389180B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 6, 2004 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Apr 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/84
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic tracked and ranging system is disclosed. Electronic tracking and ranging system applies interferometer principles to determine ranging distance from a monitor unit 10 to a tracked unit 12. In particular, the system transmits a monitor direct sequence spread spectrum (MDSSS) 52 signal from a monitor unit 10 to a tracked unit 12. Afterwards, tracked unit 12 transmits a tracked direct sequence spread spectrum (TDSSS) 56 signal. Finally, monitor unit 10 receives TDSSS 56, performs a comparison to a reference MDSSS signal 52 locks between MDSSS signal 52 and TDSSS signal 56 and outputs distance between monitor unit 10 and tracked unit 12 using several phase comparisons. Multiple frequencies within MDSSS signal 52 are phase detected so as to increase accuracy of monitor unit 10 ranging distance to tracked unit 12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.