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Intensity modulation and direct detection (IM/DD) is the most commonly applied scheme in optical wireless communication systems. There is no exact channel capacity expression for optical wireless communication systems in IM/DD additive white Gaussian noise (AWGN) channels, but capacity bounds exist. In this letter, channel capacity for optical wireless communications in the IM/DD AWGN channel is analyzed...
The bit error rate performance of interleave division multiple access (IDMA) based systems can be predicted by signal-to-noise ratio (SNR) evolution which tracks the average symbol SNR at each iteration and provides a faster solution than brute-force simulations. As the desired SNR in the evolution procedure is hard to obtain, approximate SNR updating formula has been widely adopted in the literature...
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