摘要
Multipath interference induced power fading occurs when the transmission path lengths from the light emitting diodes to a single receiver are different in a visible light communication system. To solve this problem, we apply a QR-decomposition-based channel equalizer （QR-CE） to achieve successive interference cancellation for a discrete Fourier transform spreading （DFT-S） orthogonal frequency division multiplexing （OFDM） signal. We experimentally demonstrate a 200 Mb/s DFT-S OFDM over a 2 m free-space transmission. The experimental results show that a DFT-S OFDM with QR-CE attains much better bit error rate performance than a DFT-S OFDM with conventional CEs. The impacts of several parameters on a QR-CE are also investigated.
Multipath interference induced power fading occurs when the transmission path lengths from the light emitting diodes to a single receiver are different in a visible light communication system. To solve this problem, we apply a QR-decomposition-based channel equalizer （QR-CE） to achieve successive interference cancellation for a discrete Fourier transform spreading （DFT-S） orthogonal frequency division multiplexing （OFDM） signal. We experimentally demonstrate a 200 Mb/s DFT-S OFDM over a 2 m free-space transmission. The experimental results show that a DFT-S OFDM with QR-CE attains much better bit error rate performance than a DFT-S OFDM with conventional CEs. The impacts of several parameters on a QR-CE are also investigated.
基金
supported in part by the Open Foundation of State Key Laboratory of Advanced Optical Communication Systems Networks(Beijing University)
the Open Foundation of State Key Laboratory of Optical Communication Technologies and Networks(Nos.2013OCTN-02 and 2015OCTN-02)
