Abstract
We investigate the multilevel modulation for red-green-blue light emitting diode (RGB
LED). A simple approach for extracting soft values from the modulation is proposed. The mapping way
from bits to the modulated symbols for the multilevel modulation is also investigated. The modified
modulation is obtained through the brute force. Based on the Monte Carlo simulations, the proposed
approach and modified modulation are confirmed and better bit error rate (BER) performances are
obtained.
© 2013 Chinese Optics Letters
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