In this letter, we experimentally study the statistical properties of a received QPSK modulated signal and compare various bit error rate (BER) estimation methods for coherent optical orthogonal frequency division multiplexing transmission. We show that the statistical BER estimation method based on the probability density function of the received QPSK symbols offers the most accurate estimate of the system performance.
|Number of pages||4|
|Journal||IEEE Photonics Technology Letters|
|Early online date||4 Sep 2014|
|Publication status||Published - 15 Nov 2014|
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Funding: Sterlite Technologies and Finisar; FOX-C Project (318415);DISCUS Project (318137); European Communities 7th Framework Programme FP7 through the MODE-GAP Project (258033); EPSRC (EP/J017582/1).
- bit error rate
- coherent detection
- coherent optical transmission
- orthogonal frequency division multiplexing