Adaptive array antenna
First Claim
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1. An adaptive array antenna comprising:
- array antenna elements;
first and second phase control circuits which control phase shift amount of a transmission data packet and supply the transmission data packet to the array antenna elements;
a distributor configured to distribute the transmission data packet to one of the first and second phase control circuits based on a destination user information of the data packet; and
a phase shift amount control circuit configured to control the phase shift amount of the first and second phase control circuits based on the destination user information of the data packet distributed to the first and second phase control circuits.
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Abstract
An adaptive array antenna comprising array antenna elements, first and second phase control circuits for transmission data packet, a distributor distributing the transmission data packet to one of the first and second phase control circuits based on the destination, and phase shift amount control circuit controlling the phase shift amount of the first and second phase control circuits based on the destination.
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Citations
15 Claims
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1. An adaptive array antenna comprising:
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array antenna elements;
first and second phase control circuits which control phase shift amount of a transmission data packet and supply the transmission data packet to the array antenna elements;
a distributor configured to distribute the transmission data packet to one of the first and second phase control circuits based on a destination user information of the data packet; and
a phase shift amount control circuit configured to control the phase shift amount of the first and second phase control circuits based on the destination user information of the data packet distributed to the first and second phase control circuits. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A transmitter for supplying a data packet to array antenna elements, the transmitter comprising:
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a distributor configured to receive the data packet and its destination user information and distribute the data packet to one of first and second paths based on the destination user information; and
first and second transmission signal generation circuits which receive the data packets distributed to the first and second paths and generate first and second transmission burst intermediate frequency signals;
first and second dividers which receive the first and second transmission burst intermediate frequency signals and divide the first and second transmission burst intermediate frequency signals into a number of signals which equals to the number of the array antenna elements;
first phase control circuits configured to receive outputs from the first divider;
second phase control circuits configured to receive outputs from the second divider;
a first phase shift amount control circuit configured to control phase shift amounts of the first phase control circuits based on the destination user information;
a second phase shift amount control circuit configured to control phase shift amounts of the second phase control circuits based on the destination user information;
adders configured to add outputs of the first phase control circuits and the second phase control circuits; and
frequency converters configured to convert outputs of the adders to radio signals to be supplied to the array antenna elements. - View Dependent Claims (9, 10, 11, 12, 13, 15)
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14. A transmission method of an adaptive array antenna comprising:
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receiving a data packet and destination user information of the data packet;
determining whether or not the destination user information of the data packet is identical to the destination user information of a preceding data packet;
distributing the data packet and the destination user information to a path which is different from a path to which the preceding data packet and the destination user information are distributed;
setting a phase control amount to a phase control circuit based on the destination user information;
activating the phase control circuit;
generating a transmission burst intermediate frequency signal based on the distributed data packet and supplying the generated transmission burst intermediate frequency signal to the phase control circuit; and
converting the transmission burst intermediate frequency signal output from the phase control circuit to a radio signal to be transmitted from the adaptive array antenna.
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Specification