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.
Bibliographical note© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
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