ADAPTATION OF A DIRECTIONAL CHARACTERISTIC OF A RADIO SIGNAL BASED ON THE SPATIAL ORIENTATION OF A RADIO TRANSMITTER
First Claim
1. A transmitter for transmitting a radio signal to a receiver for transmitting a magnetic or an electromagnetic radio signal, the transmitter comprising:
- a transmit coil for transmitting a radio signal,a determining device for determining a spatial orientation of the transmit coil with respect to a reference direction and for providing an orientation signal indicative of the determined spatial orientation of the transmit coil, anda control unit for controlling the transmit coil in such a manner that a directional characteristic of the radio signal being transmitted by the transmitter depends on the orientation signal.
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Accused Products
Abstract
It is described an open-loop transmit coil diversity scheme, intended for communication based on magnetic induction, wherein the diversity scheme automatically aligns the transmit coil (110) of a transmitter (100) with the receive coil of a receiver without relying on feedback information from the receiver to the transmitter (100). This may be achieved by having a plurality of coils (110, 120, 130) in the transmitter (100) and/or in the receiver. Each of these coils (110, 120, 130) may be oriented orthogonally with respect to the other coil(s). The optimal coil (130) may be selected by measuring the position angle of the transmitter (100) and/or the receiver by making use of at least one inclinometer (132). For radio communication on the transmitter and/or on the receiver this coil (130) is selected, whose orientation is maximally parallel with the orientation of the corresponding coil on the other side of the radio communication link. Alternatively, if there is only one coil in the transmitter and/or the receiver, it may be possible to spatially adjust the orientation of the transmit coil and/or the receive coil by employing at least one mechanical actuator.
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Citations
13 Claims
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1. A transmitter for transmitting a radio signal to a receiver for transmitting a magnetic or an electromagnetic radio signal, the transmitter comprising:
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a transmit coil for transmitting a radio signal, a determining device for determining a spatial orientation of the transmit coil with respect to a reference direction and for providing an orientation signal indicative of the determined spatial orientation of the transmit coil, and a control unit for controlling the transmit coil in such a manner that a directional characteristic of the radio signal being transmitted by the transmitter depends on the orientation signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10)
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8. A receiver for receiving a radio signal from a transmitter, including at least one of a magnetic and an electromagnetic radio signal, the receiver comprising:
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a receive coil for receiving a radio signal, a determining device for determining a spatial orientation of the receive coil with respect to a reference direction and for providing an orientation signal being indicative of the determined spatial orientation of the receive coil, and a control unit for controlling the receive coil in such a manner that a directional characteristic for receiving the radio signal being received by the receiver depends on the orientation signal. - View Dependent Claims (11)
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12. A method for transmitting a radio signal from a transmitter to a receiver, the method comprising
determining a spatial orientation of a transmit coil of the transmitter with respect to a reference direction, providing an orientation signal being indicative of the determined spatial orientation of the transmit coil, and controlling the transmit coil in such a manner that a directional characteristic of the radio signal being transmitted by the transmitter depends on the orientation signal.
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13. A method for receiving a radio signal from a transmitter by a receiver, the method comprising
determining a spatial orientation of a receive coil of the receiver with respect to a reference direction, providing an orientation signal being indicative of the determined spatial orientation of the receive coil, and controlling the receive coil in such a manner that a directional characteristic for receiving the radio signal depends on the orientation signal.
Specification