In this paper,a design of ultraphonic tubulous water communication system based on OFDM is introduced. The system takes PL3106 which is embedded enhanced 8051 microprocessor as the control chip and takes TMS320VC5509 ...In this paper,a design of ultraphonic tubulous water communication system based on OFDM is introduced. The system takes PL3106 which is embedded enhanced 8051 microprocessor as the control chip and takes TMS320VC5509 as the core of OFDM modulation-demodulation.In the paper,the principle of OFDM is introduced briefly.The hardware and software of the system are designed and the experimental results are analysed and concluded.展开更多
Rain has a strong attenuation effect on light,which can impact the performance of visible light communication(VLC).In this paper,we addressed the crucial challenge of implementing high-speed VLC systems in rainy envir...Rain has a strong attenuation effect on light,which can impact the performance of visible light communication(VLC).In this paper,we addressed the crucial challenge of implementing high-speed VLC systems in rainy environments by focusing on the performance of different wavelengths under varying rain conditions.By analyzing the attenuation characteristics of four laser diodes at different wavelengths under various artificial rain environments,we developed a high-speed VLC system optimized for rainy channel high-speed visible light communication by employing the orthogonal frequency-division multiplexing modulation scheme.By integrating channel-adaptive pre-equalization and bit-loading algorithms,our system optimized signal transmission in rainy channels,enabling an aggregated data rate exceeding 30 Gbps,which was the highest reported data rate for VLC in rainy channels,to the best of our knowledge.展开更多
文摘In this paper,a design of ultraphonic tubulous water communication system based on OFDM is introduced. The system takes PL3106 which is embedded enhanced 8051 microprocessor as the control chip and takes TMS320VC5509 as the core of OFDM modulation-demodulation.In the paper,the principle of OFDM is introduced briefly.The hardware and software of the system are designed and the experimental results are analysed and concluded.
基金supported by the National Key Research and Development Program of China(No.2021YFB3601003)。
文摘Rain has a strong attenuation effect on light,which can impact the performance of visible light communication(VLC).In this paper,we addressed the crucial challenge of implementing high-speed VLC systems in rainy environments by focusing on the performance of different wavelengths under varying rain conditions.By analyzing the attenuation characteristics of four laser diodes at different wavelengths under various artificial rain environments,we developed a high-speed VLC system optimized for rainy channel high-speed visible light communication by employing the orthogonal frequency-division multiplexing modulation scheme.By integrating channel-adaptive pre-equalization and bit-loading algorithms,our system optimized signal transmission in rainy channels,enabling an aggregated data rate exceeding 30 Gbps,which was the highest reported data rate for VLC in rainy channels,to the best of our knowledge.
