Antenna device and method for determining radiation pattern

1. An antenna device comprising:

a plurality of antennas configured to receive and transmit signals; and

a processor coupled to the antennas by an electronic switch, configured to divide radiation patterns of combinations of the antennas into a predetermined number of characteristic patterns, and further configured to calculate similarities of the characteristic patterns and a RSSI of each of the characteristic patterns,

wherein when the antenna device is in operation, the processor reads and analyzes RSSI of the signals received by the antennas, and compares the RSSI of the signals of the antennas with the RSSI of the characteristic patterns, and determines a matched characteristic pattern group according to results of comparisons and the similarities of the characteristic patterns.

2. The antenna device of claim 1 , wherein the processor is further configured to read and analyze RSRQ and RSRP of the signals received by the antennas, and compares the RSRQ and the RSRP of the signals of the antennas with the RSRQ, the RSRP and RSSI of the characteristic patterns, and determines a matched characteristic pattern group according to results of comparisons of RSRQ, RSRP and RSSI and the similarities of the characteristic patterns.

3. The antenna device of claim 1 , wherein the processor is further configured to calculate a number of combinations of the antennas corresponding to each characteristic pattern of the matched characteristic pattern group, and a matched characteristic pattern with a largest number of combinations of the antennas is determined to be an optimal radiation pattern.

4. The antenna device of claim 3 , wherein the processor is further configured to control the electronic switch to couple to corresponding antennas according to the optimal radiation pattern.

5. The antenna device of claim 4 , further comprising a storage unit coupled to the processor, configured to store a mapping relationship between signal, the optimal radiation pattern, and antenna combination, wherein the processor is further to query the mapping relationship between the signal, the optimal radiation pattern with a largest number of combinations of the antennas, and the combination of the antennas to determine the optimal radiation pattern when a new signal is received.

6. A method for determining radiation pattern, which is applied to an antenna device with a plurality of antennas, an electronic switch and a processor, the method comprising:

dividing radiation patterns of combinations of the antennas into a predetermined number of characteristic patterns;

calculating RSSI of each of the characteristic patterns;

calculating similarities of the characteristic patterns;

reading and analyzing RSSI of signals received by the antennas when the antenna device is in operation;

comparing the RSSI of the characteristic patterns with the RSSI of signals of the antennas; and

determining a matched characteristic pattern group according to results of the comparison and the similarities of the characteristic patterns.

7. The method of claim 6 , before the step of determining the matched characteristic pattern group according to results of the comparisons and the similarities of the characteristic patterns, further comprising:

calculating RSRQ and RSRP of each of the characteristic pattern;

reading and analyzing RSRQ and RSRP of signals received by the antennas when the antenna device is in operation;

comparing the RSRQ, the RSRP and the RSSI of the characteristic patterns with the RSRQ, the RSRP and the RSSI of the signals of the antennas; and

determining the matched characteristic pattern group according to results of the comparisons and the similarities of the characteristic patterns.

8. The method of claim 7 , further comprising calculating a number of the combinations of the antennas corresponding to each characteristic pattern of the matched characteristic pattern group, wherein the matched characteristic pattern with a largest number of combinations of the antennas is determined to be an optimal radiation pattern.

9. The method of claim 8 , further comprising controlling the electronic switch to couple to corresponding antennas according to the optimal radiation pattern.

10. The method of claim 9 , further comprising:

storing a mapping relationship between signal, the optimal radiation pattern, and the combinations of the antennas; and

querying the mapping relationship between the signal, the optimal radiation pattern, and the combinations of the antennas to determine the optimal radiation pattern with a largest number of combinations of the antennas when a new signal is received.