Spectral Efficiency of Coded PhaseShift Keying for FiberOptic Communication
Journal of Lightwave Technology, Vol. 21, Issue 10, pp. 2438 (2003)
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Abstract
Several optical modulation and detection schemes are compared by computing their spectral efficiencies over additive white Gaussian noise channels. The bandwidth savings of differential quadrature phaseshift keying (DQPSK) over both directdetection onoff keying and differential binary phaseshift keying suggest that DQPSK can improve the reach and efficiency of wavelengthdivision multiplexing systems. To test the theory, ReedSolomon and lowdensity paritycheck forward error correction codes are designed and evaluated. The codes generally behave as expected, except that for DQPSK the gains are hampered by the differential detector. It is further shown that neither multiplesymbol differential detection nor decisionfeedback detection is attractive when using strong codes.
© 2003 IEEE
Citation
Gerhard Kramer, Alexei Ashikhmin, Adriaan J. van Wijngaarden, and Xing Wei, "Spectral Efficiency of Coded PhaseShift Keying for FiberOptic Communication," J. Lightwave Technol. 21, 2438 (2003)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt21102438
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