发明名称 |
AN OPTICAL ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (O-OFDM) SYSTEM WITH PULSE-WIDTH MODULATION (PWM) DIMMING |
摘要 |
An optical orthogonal frequency division multiplexing (O-OFDM) system with pulse-width modulation (PWM) dimming includes a driver responsive to one or more predetermined dimming set points configured to generate PWM signals having a predetermined duty cycle and configured to supply current to one or more light emitting diodes (LEDs). An O-OFDM generator responsive to the one or more predetermined dimming set points and digital data is configured to generate digital inverted O-OFDM signals during on-states of the PWM signals and non-inverted O-OFDM signals during off-states of the PWM signals according to the predetermined duty cycle and convert the digital inverted O-OFDM signals and the digital non-inverted O-OFDM signals to analog output O-OFDM signals. A combiner circuit responsive to the current from the driver and the analog output O-OFDM signals is configured such that the analog output O-OFDM signals modulate the current to the one or more LEDs to provide a high capacity visible light communication link |
申请公布号 |
EP3014798(A4) |
申请公布日期 |
2017.03.22 |
申请号 |
EP20140847891 |
申请日期 |
2014.06.24 |
申请人 |
Trustees of Boston University |
发明人 |
ELGALA, Hany;LITTLE, Thomas |
分类号 |
H04J11/00;H04B10/116;H04J14/00;H04L25/49;H04L27/26 |
主分类号 |
H04J11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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