Communication system and method of operating communication system

A method of operating a communication system comprising a transmission unit and a reception unit,

• wherein the transmission unit includes:
• a light-emitting unit that has a plurality of light-emitting elements that emit light in different wavelength bands, the light-emitting unit controlling light emission of the plurality of light-emitting elements;
• and
• a signal generation unit that generates as a control signal a signal to control the light emission of the plurality of light-emitting elements based on a transmission signal and supplies the control signal to the light-emitting unit, and the reception unit includes:
• a snapshot-type spectroscopic camera that detects an optical spectrum of light emitted by the light-emitting unit;
• and
• a restoration unit that restores the transmission signal based on light emission intensities in wavelength bands respectively corresponding to the plurality of light-emitting elements in the optical spectrum detected by the snapshot-type spectroscopic camera,
• wherein a method of operating the transmission unit includes:
• generating, by the signal generation unit, as a control signal a signal to control the light emission of the plurality of light-emitting elements based on the transmission signal, and supplying the control signal to the light-emitting unit;
• and
• controlling, by the light-emitting unit, light emission of the plurality of light-emitting elements based on the control signal, and
• wherein a method of operating the reception unit includes:
• detecting, by the snapshot-type spectroscopic camera, an optical spectrum of light emitted by the light-emitting unit;
• and
• restoring, by the restoration unit, the transmission signal based on light emission intensities in wavelength bands respectively corresponding to the plurality of light-emitting elements in the optical spectrum detected by the snapshot-type spectroscopic camera.