| 摘要 |
The present invention relates to a method for determining the speed of a terminal equipment and a receiver in a radio system using a time division multiple access method, which receiver comprises means (202, 502) for sampling the received signal. In order to determine the speed of the terminal equipment advantageously, the receiver comprises means (202, 208, 500) for forming a parameter proportional to the mean strength of the signal envelope during a time window at most half a time slot in length, in each received time slot by using at least two time windows, and means (208, 500) for calculating the variation of the envelope by time slots on the basis of the parameter, and for averaging the derived variation value over several time slots, and means (210, 212) for comparing the averaged variation value with the calculated reference value, and for indicating the speed of the equipment.
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