Doppler effect compensation for radio transmission
First Claim
1. A Doppler compensation method for data to be transmitted within frames via radio transmission between a mobile body and a base station, both mobile body and base station comprise respectively a transceiver connected to an antenna for the radio transmission, the method comprises the following steps of:
- Determining the Doppler effect acting on the frames when transmitted as a signal through that radio transmission for a given speed and direction of motion of the mobile body with respect to the base station;
The method being further wherein the step ofApplying by the transceiver some sampling procedure by allocating different time delays to the signal, the different time delays being chosen following a law adapted to compensate the determined Doppler effect.
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Accused Products
Abstract
The goal of the invention is to keep the delay of a communication signal between a moving vehicle (mobile body) and a fixed base station constant. This is achieved by a Doppler compensation method for data to be transmitted within frames via radio transmission between a mobile body and some base station, both mobile body and base station comprise respectively a transceiver connected to an antenna for the radio transmission. The method comprises the step of determining the Doppler effect acting on the frames when transmitted as a signal through that radio transmission for a given speed and direction of motion of the mobile body with respect to the base station. It is then followed by the step to apply by the transceiver some sampling procedure comprising an allocation of different time delays to the signal, the different time delays being chosen following a law adapted to compensate the determined Doppler effect.
14 Citations
15 Claims
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1. A Doppler compensation method for data to be transmitted within frames via radio transmission between a mobile body and a base station, both mobile body and base station comprise respectively a transceiver connected to an antenna for the radio transmission, the method comprises the following steps of:
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Determining the Doppler effect acting on the frames when transmitted as a signal through that radio transmission for a given speed and direction of motion of the mobile body with respect to the base station; The method being further wherein the step of Applying by the transceiver some sampling procedure by allocating different time delays to the signal, the different time delays being chosen following a law adapted to compensate the determined Doppler effect. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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- 8. A radio frequency device comprising a transceiver connected to an antenna, the radio frequency device being comprises further a decision unit analyzing the Doppler effect acting on frames when transmitted as a signal through a radio transmission between a mobile body and a base station, the mobile body moving at a given speed and direction with respect to the base station while the decision unit controls a sampling unit from the transceiver such that different time delays is allocated by the sampling unit to the signal, the different time delays being chosen following a law adapted to compensate the determined Doppler effect.
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12. The radio frequency device according to claim wherein the time delay unit comprises conducting paths being delay lines with different propagation time property.
Specification