Electrode selection device for selecting optimal electrodes to communicate with capsule endoscope, and operation method thereof

An operation method of an electrode selection device communicating with a capsule endoscope, the method comprising:

• recovering first data based on first signals transmitted from the capsule endoscope to a first electrode and a second electrode and calculating a first correlation value between the first electrode and the second electrode based on the first data;
• recovering second data based on second signals transmitted from the capsule endoscope to the first electrode and a third electrode and calculating a second correlation value between the first electrode and the third electrode based on the second data;
• recovering third data based on third signals transmitted from the capsule endoscope to the second electrode and the third electrode and calculating a third correlation value between the first electrode and the third electrode based on the third data;
• calculating a first correlation sum of the first electrode, a second correlation sum of the second electrode, and a third correlation sum of the third electrode by separately adding the first to third correlation values;
• and
• selecting a receiving electrode pair among the first to third electrodes based on the first to third correlation sums,
• wherein the selecting of the receiving electrode pair comprises:
• comparing magnitudes of the first to third correlation sums,
• when the first correlation sum is greater than the second correlation sum and the second correlation sum is greater than the third correlation sum, comparing the first correlation value with a reference value,
• if the first correlation value is equal to or greater than the reference value, selecting the first and second electrodes as the receiving electrode pair;
• and
• if the first correlation value is less than the reference value, selecting the first and third electrodes as the receiving electrode pair.