A histogram is generated from image data, and two distribution areas are detected. The system may include a first antenna, a second antenna configured to communicate a communications signal with the first antenna using point-to-point communications, and a position controller coupled to the first antenna and configured to re-align the first antenna with respect to the second antenna in response to determining a misalignment of the antenna. Accordingly, it is possible to reduce the size of a firmware by preventing channels unnecessary to perform a write mode from being used.