Abstract

We consider the two nodes indoor full-duplex transmission over bidirectional channels with imperfect self-interference cancellation in visible light communications (VLCs). The light emitting diodes (LEDs) are used for illumination and data transmission while the photo diodes (PDs) are used for reception. In this paper, we first formulate the sum-capacity maximization problem for the full-duplex bidirectional VLCs. Then, we develop an optimal power allocation scheme, which has the closed-form expression, to achieve the maximum sum-capacity for two nodes indoor full-duplex bidirectional VLCs. The obtained numerical results verify our developed optimal power allocation scheme and show that the full-duplex transmission can significantly increase the sum-capacity than the traditional half-duplex transmission.

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