Constellation Optimization for Phase-shift Keying Coherent States with Displacement Receiver to Maximize Mutual Information
AffiliationDepartment of Electrical & Computer Engineering, The University of Arizona
College of Optical Sciences, The University of Arizona
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CitationBhadani, R., & Djordjevic, I. B. (2020). Constellation Optimization for Phase-Shift Keying Coherent States With Displacement Receiver to Maximize Mutual Information. IEEE Access, 8, 224409-224419.
RightsCopyright © Author(s) 2020. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.
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AbstractAn important problem in quantum information theory is finding the best possible capacity of the optical communication channel employing suitable codewords, receiver design, and constellation optimization techniques. In this paper, we derive an alternative channel capacity, CG, of phase-shift keying coherent state with a realizable displacement receiver by maximizing mutual information over symbol priors and pre-detection displacement. We find that CG is higher than the capacity achieved by maximizing mutual information over symbol prior but with zero displacement. The overall scheme demonstrates designing an improved, yet easy-to-implement receiver for better communication performance by tuning it at different photon number regime. Further, we present a comparative analysis of CG with existing receiver designs. We extend our study to account for detector imperfections. CCBY
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Except where otherwise noted, this item's license is described as Copyright © Author(s) 2020. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.