Process and device for estimating the speed of movement of a mobile terminal of a wireless communication system
AssigneeSTMicroelectronics S.r.l.
InventorDavid Chappaz
Life of this patent
Estimating the term…
Abstract
Estimating the speed of movement of a mobile terminal includes estimating the impulse response of the transmission channel at a given instant, and estimating the time derivative of the estimated impulse response. Estimating the speed also includes determining of a ratio of the energy of the estimated impulse response to the energy of the estimated time derivative.
Claims30
A process for estimating a speed of movement of a mobile terminal operating in a wireless communication system and communicating with a base station via a transmission channel, the process comprising:
- estimating an impulse response of the transmission channel at a given instant;
- estimating a time derivative of the estimated impulse response;
- and
- determining a ratio between energy of the estimated impulse response and energy of the estimated time derivative.
A cellular telephone comprising:
- a device for estimating a speed of movement of the cellular telephone operating in a wireless communication system and communicating with a base station via a transmission channel, said device comprising
- first estimation means for estimating an impulse response of the transmission channel at a given instant,
- second estimation means for estimating a time derivative of the estimated impulse response, and
- speed estimation means for determining a ratio between energy of the estimated impulse response and energy of the estimated time derivative.
A cellular telephone comprising:
- an antenna;
- an analog stage connected to said antenna;
- and
- a digital stage connected to said analog stage for estimating a speed of movement of the cellular telephone by
- estimating an impulse response of a transmission channel at a given instant,
- estimating a time derivative of the estimated impulse response, and
- determining a ratio between energy of the estimated impulse response and energy of the estimated time derivative.
Dependencies are inferred from the claim text.