Abstract
A new moment generating function (MGF) is proposed to assess rigorously
the performance of optically preamplified receivers with direct-detection
employing baseband orthogonal frequency division multiplexing (OFDM). By comparison
with Monte Carlo simulation, the proposed MGF-based method shows very good
accuracy when predicting the bit error probability for arbitrary optical and
electrical filters, different numbers of OFDM subcarriers, and double sideband
and single sideband optical OFDM signals. Its good accuracy when estimating
the bit error probability in each individual subcarrier is also demonstrated.
The new MGF-based method exhibits a significant improvement of accuracy when
compared to the MGF-based method previously reported in the literature, especially
for filter bandwidths not exceeding the OFDM signal bandwidth, which is the
range corresponding to the optimum filter bandwidth.
© 2012 IEEE
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