Electronic device and operating method of electronic device
According to an aspect of the inventive concept, an electronic device includes a transmitter including a plurality of antennas, and a communication processor for calculating a total exposure ratio (TER) value of each of the plurality of antennas, wherein the communication processor includes an antenna index buffer for storing a used antenna index, which is an index of one or more used antennas from among the plurality of antennas used in each window, a used power buffer for storing used power of an antenna corresponding to the used antenna index, and a controller configured to calculate the TER value based on the used antenna index, the used power, and an influence matrix.
1. An electronic device comprising:
a transmitter including a plurality of antennas; and
a communication processor configured to calculate a total exposure ratio (TER) value of each of the plurality of antennas,
wherein the communication processor includes:
an antenna index buffer configured to store a used antenna index, which is an index of one or more used antennas from among the plurality of antennas used in each window of a plurality of windows in a TER measurement interval;
a used power buffer configured to store used power of an antenna corresponding to the used antenna index; and
a controller configured to calculate the TER value based on the used antenna index, the used power, and an influence matrix, wherein the influence matrix includes a plurality of influence coefficients R (i, j), each of which represents a degree of influence of exposure caused by a radio frequency (RF) signal transmission of an i th antenna on a j th antenna, and wherein i and j are integer numbers equal to a number of the plurality of antennas.
2. The electronic device of claim 1 ,
wherein the influence matrix is calculated based on at least one of a correlation between the plurality of antennas, an electromagnetic wave emission direction of the plurality of antennas, an electromagnetic wave emission amount of the plurality of antennas, a state of the electronic device, and a distance between the plurality of antennas.
3. The electronic device of claim 2 ,
wherein the controller is further configured to:
select the influence matrix from an influence matrix group based on the state of the electronic device; and
calculate the TER value based on the influence matrix.
4. The electronic device of claim 1 ,
wherein the controller is further configured to:
calculate transmit power limit of the one or more used antennas to be used in a setting target window after the TER measurement interval based on the TER value; and
set transmit power of the one or more used antennas based on the transmit power limit of the one or more used antennas.
5. The electronic device of claim 4 ,
wherein the controller is further configured to:
in a case in which the electronic device performs communication using one communication network and the number of the one or more used antennas is one, when transmit power limit of one used antenna to be used in the setting target window is less than maximum required power for transmitting an RF signal, calculate transmit power limit of an unused antenna from among the plurality of antennas; and
determine whether to replace the one used antenna with the unused antenna based on the transmit power limit of the unused antenna and the maximum required power.
6. The electronic device of claim 5 ,
wherein the controller is further configured to:
when the transmit power limit of the unused antenna is greater than or equal to the maximum required power, set the unused antenna as a new used antenna to be used in the setting target window and set transmit power of the new used antenna to be used in the setting target window based on the maximum required power; and
when the transmit power limit of the unused antenna is less than the maximum required power, keep the one used antenna for use in the setting target window and set the transmit power of the one used antenna to be used in the setting target window based on the transmit power limit of the one used antenna.
7. The electronic device of claim 1 , wherein the controller is further configured to, when the electronic device performs communication using one communication network and the number of the one or more used antennas is plural, calculate a convergence influence matrix based on the plurality of used antennas and the influence matrix and calculate the TER value of the plurality of used antennas based on the convergence influence matrix.
8. The electronic device of claim 7 , wherein the controller is further configured to:
when the electronic device performs communication using one communication network and the number of the one or more used antennas is plural, calculate transmit power limit of the plurality of used antennas to be used in a setting target window based on the TER value of the plurality of used antennas; and
set transmit power of the plurality of used antennas based on the transmit power limit of the plurality of used antennas.
9. The electronic device of claim 1 , wherein the controller is further configured to, when the electronic device performs communication using a plurality of communication networks and the number of the one or more used antennas is plural, calculate a convergence influence matrix based on the plurality of used antennas and the influence matrix, adjust the convergence influence matrix based on an antenna coefficient of each of the plurality of used antennas, and calculate the TER value of the plurality of used antennas based on the adjusted convergence influence matrix.
10. The electronic device of claim 1 , wherein the controller is further configured to:
when the electronic device performs communication using a plurality of communication networks and the number of the one or more used antennas is one, calculate transmit power limit of one used antenna to be used in a setting target window after the TER measurement interval based on the TER value of the one used antenna; and
set transmit power of the one used antenna based on the transmit power limit of the one used antenna.
11. A method of operating an electronic device, which includes a transmitter including a plurality of antennas, and a communication processor for calculating a total exposure ratio (TER) value of each of the plurality of antennas, the method comprising:
storing a used antenna index, which is an index of one or more used antennas from among the plurality of antennas used in each window of a plurality of windows in a TER measurement interval;
storing used power of an antenna corresponding to the used antenna index;
calculating the TER value based on the used antenna index, the used power, and an influence matrix, wherein the influence matrix includes a plurality of influence coefficients R (i, j), each of which represents a degree of influence of exposure caused by an RF signal transmission of an i th antenna on a j th antenna, and wherein i and j are integer numbers equal to a number of the plurality of antennas;
calculating transmit power limit of the one or more used antennas to be used in a setting target window after the TER measurement interval based on the TER value; and
setting transmit power of the one or more used antennas based on the transmit power limit of the one or more used antennas.
12. The method of claim 11 , further comprising:
in a case in which the electronic device performs communication using one communication network and the number of the one or more used antennas is one, when the transmit power limit of one used antenna to be used in the setting target window is less than maximum required power for transmitting an RF signal, calculating transmit power limit of an unused antenna from among the plurality of antennas; and
determining whether to replace the one used antenna with the unused antenna based on the transmit power limit of the unused antenna and the maximum required power.
13. The method of claim 12 , wherein the determining whether to replace the one used antenna with the unused antenna includes:
when the transmit power limit of the unused antenna is greater than or equal to the maximum required power, setting the unused antenna as a new used antenna to be used in the setting target window; and
when the transmit power limit of the unused antenna is less than the maximum required power, keeping the one used antenna for use in the setting target window.
14. The method of claim 13 ,
wherein the setting of the transmit power includes:
when the transmit power limit of the unused antenna is greater than or equal to the maximum required power, setting transmit power of the new used antenna to be used in the setting target window based on the maximum required power; and
when the transmit power limit of the unused antenna is less than the maximum required power, setting the transmit power of the one used antenna to be used in the setting target window based on the transmit power limit of the used antenna.
15. The method of claim 11 ,
wherein the calculating of the TER value includes:
when the electronic device performs communication using one communication network and the number of the one or more used antennas is plural, calculating a convergence influence matrix based on the plurality of used antennas and the influence matrix; and
calculating the TER value of the plurality of used antennas based on the convergence influence matrix.
16. The method of claim 11 ,
wherein the calculating of the TER value includes:
when the electronic device performs communication using a plurality of communication networks and the number of the one or more used antennas is plural, calculating a convergence influence matrix based on the plurality of used antennas and the influence matrix;
adjusting the convergence influence matrix based on an antenna coefficient of each of the plurality of used antennas; and
calculating the TER value of the plurality of used antennas based on the adjusted convergence influence matrix.
17. An electronic device comprising:
a transmitter including a plurality of antennas; and
a communication processor configured to:
calculate a total exposure ratio (TER) value of each of the plurality of antennas; and
set transmit power of one or more used antennas from among the plurality of antennas,
wherein the communication processor includes:
an antenna index buffer configured to store a used antenna index, which is an index of the one or more used antennas used in each window;
a used power buffer configured to store used power of an antenna corresponding to the used antenna index; and
a controller configured to:
calculate the TER value based on the used antenna index, the used power, an influence matrix, and the number of the one or more used antennas, wherein the influence matrix includes a plurality of influence coefficients R (i, j), each of which represents a degree of influence of exposure caused by an RF signal transmission of an i th antenna on a j th antenna, and wherein i and j are integer numbers equal to a number of the plurality of antennas;
calculate transmit limit power of the one or more used antennas to be used in a setting target window based on the TER value; and
set the transmit power of the one or more used antennas based on the transmit limit power of the one or more used antennas.
18. The electronic device of claim 17 ,
wherein the controller is further configured to, when the electronic device performs communication using one communication network and the number of the one or more used antennas is one, set transmit power of one used antenna based on transmit power limit of the one used antenna, transmit power limit of an unused antenna from among the plurality of antennas, and maximum required power for transmitting an RF signal.
19. The electronic device of claim 17 ,
wherein the controller is further configured to, when the electronic device performs communication using one communication network and the number of the one or more used antennas is plural, calculate a convergence influence matrix based on the plurality of used antennas and the influence matrix and calculate the TER value of the plurality of used antennas.
20. The electronic device of claim 17 ,
wherein the controller is further configured to, when the electronic device performs communication using a plurality of communication networks and the number of the one or more used antennas is plural, calculate a convergence influence matrix based on the plurality of used antennas and the influence matrix, adjust the convergence influence matrix based on an antenna coefficient of each of the plurality of used antennas, and calculate the TER value of the plurality of used antennas based on the adjusted convergence influence matrix.