CPC H04B 10/114 (2013.01) | 14 Claims |
1. A terminal device that communicates with a base station by an optical wireless communication and an RF (Radio Frequency) wireless communication, the terminal device comprising:
an optical sensor that receives an optical signal of the optical wireless communication from the base station;
a calculation unit that samples an illuminance of the optical signal to acquire a sampling value, and calculates a threshold value for binarizing the optical signal based on transition of the sampling value;
a sensor that acquires physical information other than the illuminance of the optical signal,
wherein the calculation unit changes a smoothing constant used in the calculation of the threshold value based on the sensor information output from the sensor; and
a determination unit that binarizes the optical signal based on the threshold value.
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