Method for measuring distance and position using spread spectrum signal, and an equipment using the method
US6900753B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2003 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Oct 8, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70715
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
By using the delay profile created by delay profile creating section 102 and the first threshold value 330 received from the first threshold value calculation section 105, the first threshold value timing detection section 103 selects only the earliest receive timing exceeding the first threshold value, from all the timing that the correlation value in the delay profile becomes a maximum. By using the receive timing and the second threshold value 331 received from the second threshold value calculation section 107, reference timing calculation section 106 selects the reference timing required for calculating the receive timing for the incoming wave of the minimum propagation delay time. The timing delayed by previously set timing behind said reference timing is sent from receive timing calculation section 108 as the receive timing 113 of the incoming wave of the minimum propagation delay time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.