Method for determining the speed of a terminal equipment and a receiver
US6163534A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 1998 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Aug 10, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and receiver for determining the speed of a terminal equipment in a radio system using a time division multiple access method in which a signal is transmitted in a succession of time slots each of a given duration and the signal is received and sampled, the received sampled signal having a signal envelope with a mean strength, in which the speed determination is made by measuring the man strength of the signal envelope of the received sampled signal within a given time window. The given time window has a duration that is at most half of the duration of a time slot, a parameter proportional to the mean strength of the signal envelope is formed during each time window, in each received time slot the parameter is measured by using at least two time windows, and a variation of the envelope is calculated by time slots on the basis of the parameter, to form a derived variation value, the derived variation value is averaged over several time slots to form an averaged variation value, and the averaged variation value is compared with a calculated reference value, which comparison indicates the speed of the equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.