Pseudo-random pulse interval generation in navigation-aiding devices
US7646333B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2008 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Jun 4, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/87
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic circuit comprises a randomizing bit generator configured to generate a randomizing bit sequence based on a sequence selection input signal. The randomizing bit generator includes a counter operable to provide an individual starting count for the randomizing bit sequence and a parity generator responsive to an output of the counter. The circuit further comprises a pseudo-random number generator responsive to the randomizing bit generator. The pseudo-random number generator is operable to provide at least one pulsed signal based at least in part on the random bit sequence. The electronic circuit is operable to substantially eliminate interference in a series of pulsed signal transmissions comprising the at least one pulsed signal from each of two or more navigation devices, where each of the pulsed signals from each of the navigation devices is separated by an automatically adjustable time interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.