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The Dolinar Receiver in an Information Theoretic FrameworkOptical communication at the quantum limit requires that measurements on the optical field be maximally informative, but devising physical measurements that accomplish this objective has proven challenging. The Dolinar receiver exemplifies a rare instance of success in distinguishing between two coherent states: an adaptive local oscillator is mixed with the signal prior to photodetection, which yields an error probability that meets the Helstrom lower bound with equality. Here we apply the same local-oscillator-based architecture with aninformation-theoretic optimization criterion. We begin with analysis of this receiver in a general framework for an arbitrary coherent-state modulation alphabet, and then we concentrate on two relevant examples. First, we study a binary antipodal alphabet and show that the Dolinar receiver's feedback function not only minimizes the probability of error, but also maximizes the mutual information. Next, we study ternary modulation consistingof antipodal coherent states and the vacuum state. We derive an analytic expression for a near-optimal local oscillator feedback function, and, via simulation, we determine its photon information efficiency (PIE). We provide the PIE versus dimensional information efficiency (DIE) trade-off curve and show that this modulation and the our receiver combination performs universally better than (generalized) on-off keying plus photoncounting, although, the advantage asymptotically vanishes as the bits-per-photon diverges towards infinity.
Document ID
20150006782
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Erkmen, Baris I.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Birnbaum, Kevin M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Moision, Bruce E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Dolinar, Samuel J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
April 27, 2015
Publication Date
August 21, 2011
Subject Category
Optics
Communications And Radar
Cybernetics, Artificial Intelligence And Robotics
Meeting Information
Meeting: SPIE Optics and Photonics 2011
Location: San Diego, CA
Country: United States
Start Date: August 21, 2011
End Date: August 25, 2011
Sponsors: International Society for Optical Engineering
Funding Number(s)
CONTRACT_GRANT: DARPA-JPL97-15402
Distribution Limits
Public
Copyright
Other
Keywords
optical communications
information theory
adaptive feedback receivers

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