Modulation method supporting brightness modulation of indoor visible light communication system
A technology for visible light communication and brightness adjustment, applied in the field of visible light communication, to achieve the effects of low energy utilization, excellent BER performance, and high transmission rate
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[0024] The present invention will be further described below in conjunction with the accompanying drawings.
[0025] Such as figure 1 Shown is a modulation method that supports brightness adjustment in an indoor visible light communication system. By making full use of the redundant symbols in the modulation scheme in the standard, it provides better bit error rate performance, and realizes reliable communication while meeting indoor lighting requirements. ; The method specifically includes: arranging LED lights and receiving equipment at a fixed position indoors, and aligning the LED lights with the photodetector of the receiving equipment, setting the peak transmit power of the LED lights as a fixed value, and adopting hybrid MPPM modulation and blind detection technology and MPPM demodulator to achieve better bit error rate performance; the mixed MPPM modulation is specifically: for a certain illumination brightness level, in a frame of data, part of the data adopts n-MPPM ...
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