An optical wireless communication system

An Optical Wireless Communication, OWC, system comprising an OWC transmitter and an OWC receiver,

• the OWC transmitter comprising:
• a first light source arranged to transmit light at a first wavelength;
• and
• a second light source arranged to transmit light at a second wavelength, the first wavelength and the second wavelength being different wavelengths;
• the OWC receiver comprising:
• a first light transducer arranged to detect light at the first wavelength and generate a first electrical detection signal;
• a second light transducer arranged to detect light at the second wavelength and generate a second electrical detection signal, the OWC transmitter comprising:
• a first light source driver arranged to generate a positive unipolar first drive signal for driving the first light source, by mapping a first unipolar half of a bipolar modulated first data signal onto a positive unipolar signal, thereby generating the first drive signal, the first unipolar half of the bipolar modulated first data signal occupying a first bandwidth range below a first frequency;
• a second light source driver arranged to generate a positive unipolar second drive signal for driving the second light source, by mapping a second unipolar half of the bipolar modulated first data signal onto a positive unipolar signal, thereby generating the second drive signal and
• the OWC receiver comprising:
• a first signal reconstruction unit arranged to generate a first received signal, the first signal reconstruction unit arranged to combine:
• the first electrical detection signal within the first bandwidth range below a first frequency as a first component with a first polarity with,
• the second electrical detection signal as a second component with a second polarity, the first polarity opposite to the second polarity, thereby forming the first received signal for output by the OWC receiver.