Calibration apparatus of adaptive array antenna and calibration method thereof

A calibration apparatus of an adaptive array transmitting antenna system having a plurality of array antennas, the calibration apparatus comprising:

• a vector addition means for adding each output of each beamforming means;
• a calibration signal generating means for generating a calibration signal to be injected into a channel for estimating a transfer function;
• a calibration signal injection means for injecting a calibration signal vector added by the signal received from the vector addition means, into a calibration means;
• an array transmission means for converting a digital data to an analog data, and for up-converting to an RF band;
• a coupling means for interlocking a switch means with the signal received from the array transmission means;
• an exchange means for selecting a path or a circuit of the signal received from the coupling means;
• a calibration signal receiving means for converting the signal received from the exchange means from the RF band into the baseband;
• a calibration coefficient estimation means for finding out a calibration coefficient by using that the transfer function of the array transmission means is estimated sequentially through the calibration signal received from the calibration signal receiving means;
• and
• a calibration means for eliminating an interference signal by means of multiplying the signal received from the calibration signal injection means by an inverse of the transfer function estimated from the calibration coefficient estimation means.

A calibration method of an adaptive array receiving antenna, the method comprising the steps of:

• a) generating a calibration signal in order to measure a transfer function of an array receiving means;
• b) injecting a calibration signal vector into the array receiving means, wherein the calibration signal vector is produced by multiplying a divided calibration signal and a predetermined weight vector corresponding to each channel together, the divided calibration signal being the calibration signal divided by total number of channels;
• c) finding out a calibration coefficient by using that the transfer function of each receiving channel is estimated by analyzing the signal injected from the array receiving means;
• and
• d) generating a receive signal that an interference signal is eliminated, by multiplying the received signal of a baseband and the calibration coefficient together.

A calibration method of in an adaptive array transmitting antenna, the method comprising the steps of:

• a) generating a calibration signal in order to measure the transfer function of an array transmission means;
• b) injecting a calibration signal vector into the array transmission means, wherein the calibration signal vector is produced by multiplying the calibration signal and a predetermined weight vector corresponding to each channel together;
• c) finding out a calibration coefficient by using that the transfer function of each receiving channel is estimated by analyzing a down-converted signal after down-converting the signal injected from the array transmission means;
• and
• d) generating a transmission signal that an interference signal is eliminated, by multiplying the transmission signal and the calibration coefficient together.

A computer-readable media storing instructions for executing a calibration method of an adaptive array receiving antenna, the method comprising the steps of:

• a) generating a calibration signal in order to measure a transfer function of an array receiving means;
• b) injecting a calibration signal vector into the array receiving means, wherein the calibration signal vector is produced by multiplying a divided calibration signal and a predetermined weight vector corresponding to each channel together, the divided calibration signal being the calibration signal divided by total number of channels;
• c) finding out a calibration coefficient by using that the transfer function of each receiving channel is estimated by analyzing the signal injected from the array receiving means;
• and
• d) generating a receive signal that an interference signal is eliminated, by multiplying the received signal of baseband and the calibration coefficient together.

A computer-readable media storing instructions for executing a calibration method of an adaptive array transmitting antenna, the method comprising the steps of:

• a) generating a calibration signal in order to measure the transfer function of an array transmission means;
• b) injecting a calibration signal vector into the array transmission means, wherein the calibration signal vector is produced by multiplying the calibration signal and a predetermined weight vector corresponding to each channel together;
• c) finding out a calibration coefficient by using that the transfer function of each receiving channel is estimated by analyzing a down-converted signal after down-converting the signal injected from the array transmission means;
• and
• d) generating a transmission signal that an interference signal is eliminated, by multiplying the transmission signal and the calibration coefficient together.