Messa Alessandro, Cossu Giulio, Presi Marco, Schidl Stefan, Schneider-Hornstein Kerstin, Zimmermann Horst, Ciaramella Ernesto
Opt Lett. 2020 Mar 1;45(5):1160-1163. doi: 10.1364/OL.385641.
For the first time, to the best of our knowledge, we experimentally demonstrate that multiple-input-multiple-output (MIMO) processing allows using a single photodiode to detect simultaneously a wavelength-division multiplexing (WDM) visible light communications (VLC) signal. The photodiode has a triple junction, and when it is illuminated by a WDM signal, the junctions produce inherently three photocurrents that are unusable for detecting any of the WDM signals. However, by means of linear MIMO processing, we are able to recover the transmitted signals exactly. Bit error rate measurements confirm the effectiveness of the proposed solution. This opens a new scenario for practical WDM-VLC systems.
据我们所知，我们首次通过实验证明，多输入多输出（MIMO）处理允许使用单个光电二极管同时检测波分复用（WDM）可见光通信（VLC）信号。该光电二极管具有三结结构，当被WDM信号照射时，这些结会固有地产生三个光电流，而这些光电流无法用于检测任何WDM信号。然而，通过线性MIMO处理，我们能够精确恢复发射信号。误码率测量证实了所提出解决方案的有效性。这为实际的WDM-VLC系统开辟了新的场景。
