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Exact evaluation of the capacity for intensity-modulated direct-detection channels with optical amplifier noises

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1 Author(s)
Keang-Po Ho ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Based on a rigorous model without approximation, the channel capacity is evaluated numerically for intensity-modulated direct-detection systems dominated by optical amplifier noises. With a discrete probability at zero intensity, the optimal input distribution is both discrete and continuously distributed. For small signal-to-noise ratio less than about 5 dB, the optimal signal is binary on-off keying.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 4 )