Coded PWM Based Switching Ripple Communication Applied in Visible Light Communication
Visible light communication (VLC) system integrates LED lighting with wireless communication. Conventionally, power conversion and communication are designed separately. The circuitry added for communication helps to achieve a high bit rate, but increases costs and impacts the efficiency. On the oth...
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| Veröffentlicht in: | IEEE transactions on power electronics 2021-08, Vol.36 (8), p.9659-9667 |
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| container_title | IEEE transactions on power electronics |
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| creator | Chen, Jinghui Wu, Jiande Wang, Ruichi Zhang, Ruoqi He, Xiangning |
| description | Visible light communication (VLC) system integrates LED lighting with wireless communication. Conventionally, power conversion and communication are designed separately. The circuitry added for communication helps to achieve a high bit rate, but increases costs and impacts the efficiency. On the other hand, power conversion and communication can also be designed together by applying switching ripple communication (SRC), where no additional devices are needed. However, SRC is usually achieved by broadband modulation methods, which means that the bandwidth is much lower than the switching frequency. By applying information theory to pulsewidth modulation, this article proposes a novel VLC scheme that applies baseband modulation to SRC in order to achieve a high bit rate with a relatively low switching frequency. In addition, power control and communication are decoupled, so that they do not influence each other. In the experiments, GaN MOSFETs are used to achieve a 1.25 Mb/s VLC system with a code error ratio of less than 10 -6 . Moreover, the scheme shows good performance under the duty cycle from 70% to 30%, and under the output power from 100% to 7.5% of the rated value. |
| doi_str_mv | 10.1109/TPEL.2021.3056754 |
| format | Article |
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Conventionally, power conversion and communication are designed separately. The circuitry added for communication helps to achieve a high bit rate, but increases costs and impacts the efficiency. On the other hand, power conversion and communication can also be designed together by applying switching ripple communication (SRC), where no additional devices are needed. However, SRC is usually achieved by broadband modulation methods, which means that the bandwidth is much lower than the switching frequency. By applying information theory to pulsewidth modulation, this article proposes a novel VLC scheme that applies baseband modulation to SRC in order to achieve a high bit rate with a relatively low switching frequency. In addition, power control and communication are decoupled, so that they do not influence each other. In the experiments, GaN MOSFETs are used to achieve a 1.25 Mb/s VLC system with a code error ratio of less than 10 -6 . 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Conventionally, power conversion and communication are designed separately. The circuitry added for communication helps to achieve a high bit rate, but increases costs and impacts the efficiency. On the other hand, power conversion and communication can also be designed together by applying switching ripple communication (SRC), where no additional devices are needed. However, SRC is usually achieved by broadband modulation methods, which means that the bandwidth is much lower than the switching frequency. By applying information theory to pulsewidth modulation, this article proposes a novel VLC scheme that applies baseband modulation to SRC in order to achieve a high bit rate with a relatively low switching frequency. In addition, power control and communication are decoupled, so that they do not influence each other. In the experiments, GaN MOSFETs are used to achieve a 1.25 Mb/s VLC system with a code error ratio of less than 10 -6 . 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| subjects | Bandwidths Baseband Bit rate Broadband Circuits Communication Communications systems encoding Energy conversion efficiency Information theory Light emitting diodes Logic gates Modulation MOSFETs Optical communication Power control Pulse duration Pulse width modulation Switching Switching frequency switching ripple communication (SRC) Visible light communication visible light communication (VLC) Wireless communications |
| title | Coded PWM Based Switching Ripple Communication Applied in Visible Light Communication |
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