Subset-Optimized Polarization-Multiplexed PSK for Fiber-Optic Communications
Journal article, 2013
A more power-efficient modulation format than polarization-multiplexed quadrature phase-shift keying (PM-QPSK) can be obtained by optimizing the amplitude ratio between symbols with odd and even parity in the PM-QPSK constellation. The optimal amplitude ratio approaches the golden ratio at high signal-to-noise ratio (SNR), yielding a 0.44 dB increase in asymptotic power efficiency compared to PM-QPSK. Union bound expressions are derived for the bit and symbol error rate of the new format, which together with Monte Carlo simulations give the power efficiency at both low and high SNR. A similar optimization performed on PM-8PSK gains 1.25 dB.
Polarization-multiplexing
four-dimensional modulation
power-efficiency
quadrature phase-shift keying
Author
Martin E Sjödin
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Erik Agrell
Chalmers, Signals and Systems, Communication, Antennas and Optical Networks
Magnus Karlsson
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
IEEE Communications Letters
1089-7798 (ISSN) 15582558 (eISSN)
Vol. 17 5 838-840 6476943Subject Categories
Nano Technology
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/lcomm.2013.030413.122871