| 摘要 |
The invention relates to a method of calibrating the reception path and the transmit path of an antenna array which comprises at least three antennas and which is connected to a digital signal processor.
For calibrating the reception path a signal of known amplitude and known phase is transmitted by a single antenna, whereby this signal is received by the other n-1 antennas, whereby a phase difference and an amplitude difference between each of the n-1 transmitted signals is evaluated. The last two steps are repeated with a new transmit antenna until every antenna has been used as a transmit antenna. In the last step the phase differences and their associated amplitude differences are set to the factory-set values.
For calibrating the transmits path of an antenna array (1) comprising at least three antennas and being connected to a digital signal processor, a method comprises the step transmitting a signal of a known amplitude and known phase by n-1 antennas and receiving these signal by the n antenna, evaluating a phase difference and an amplitude difference between each of the n-1 transmitted signals, repeating the last two steps with a new receiving antenna until every antenna has been used as a receiving antenna, compensating the phase differences and their associated amplitude differences to the factory-set values. |
