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- W2373354457 abstract "Visible light communication system using light emitting diode as light source,the system has the dual role of lighting and communication,thereby greatly saving energy.The bandwidth of LED modulation is a major obstacle to development of VLC technology. Researchers have put forward a variety of techniques to extend the modulation bandwidth and improve the transmission rate,such as Blu-ray filtering,equalization,multiple-input multiple-output(MIMO)technology,high ary modulation format,the wavelength division multiplexing technology,discrete multi-tone modulation and so on.The transmission rate of VLC system can be greatly improved by a combination of these techniques in a technical or several techniques. In this paper the affect of OFDM technology each sub-carrier modulation with MQAM to visible light communication is analyzed. A brief introduction of the visible light communication system is given,the constellation diagram of MQAM modulation is also showed,the average power spectral density and error rate are simulated by SIMULINK. The high-level quadrature amplitude modulation(MQAM)with higher bandwidth efficiency and smaller error rate is proved further,the bandwidth efficiency of 256QAM modulation is the twice of16QAM modulation." @default.
- W2373354457 created "2016-06-24" @default.
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- W2373354457 date "2013-01-01" @default.
- W2373354457 modified "2023-09-23" @default.
- W2373354457 title "Research on High-level Modulation in Visible Light Communication" @default.
- W2373354457 hasPublicationYear "2013" @default.
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