Direction determination in cellular mobile communications network
US6246366A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A direction to the location of a mobile terminal from an antenna array is determined. A sequence of symbols from each antenna 2 in the array, is stored. The sequence contains a known training sequence. The sequence is space processed iteratively so as to produce the effect of the array having a major lobe in its polar diagram at a plurality of different successive directions. A set of crosscorrelation metrics is derived by calculating a crosscorrelation metric for each direction between the combined signals and the known training sequence. The ratio is calculated of the crosscorrelation metric for each direction to the power of the combined signals for that direction to produce a set of direction metrics. A direction is ascribed to the mobile terminal using the direction metrics to determine which direction is most likely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.