Direct-current offset optimization method of multi-carrier visible light communication system
A technology of visible light communication and DC bias, applied in the field of visible light communication, can solve problems such as signal distortion and waste of energy, and achieve the effect of small calculation, high precision of results, and easy realization
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[0034] Example 1
[0035] The specific parameters are given as follows, K=256; M=16; H=1; γ b =20dB; β=1; P elec,max =0.1; P opt,max =0.2, taking the system bit error rate to optimize the target, solve the optimal undetermined parameters σ and B dc .
[0036] The specific implementation steps of the present invention are as follows:
[0037] 1) The multi-carrier visible light communication system of the present invention uses DCO-OFDM technology, where the transmitter block diagram is as follows figure 1 As shown, the receiver block diagram is as figure 2 Shown. According to the data rate and communication quality required by the user, determine the modulation order M used; determine the maximum electrical power P according to the hardware used elec,max And maximum optical power P opt,max ;According to the working environment of the system, estimate the channel coefficient H and bit energy to noise ratio γ b ;
[0038] 2) Let a=B dc / σ,s=(H 2 γ b log 2 M) -1 . Let the function...
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