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Quantum displacement receiver with feedforward operation for MPSK signals

Shuro Izumi, Mitsuo Takeoka, M. Fujiwara, Nicola Dalla Pozza, Antonio Assalini, Kenji Ema, M. Sasaki

Published Jan 1, 2012• 0 citations
OpenAlex

Abstract

We propose and study quantum receivers for 3- and 4-ary phase-shift-keyed (PSK) coherent states to outperform the conventional limit, in the bit error rate (BER), achievable by heterodyne detection known as the standard quantum limit (SQL).

Related papers

Quantum displacement receiver for M-ary phase-shift-keyed coherent states

Shuro Izumi, Masahiro Takeoka, Mikio Fujiwara +4 more

We propose quantum receivers for 3- and 4-ary phase-shift-keyed (PSK) coherent state signals to overcome the standard quantum limit (SQL). Our receiver, consisting of a displacement operation and on-off detectors with or without feedforward, provides an error probability performance beyond the SQL. We show feedforward operations can tolerate the requirement for the detector specifications.

AIP conference proceedings•Jan 1, 2014•1 citation

Displacement receiver for phase-shift-keyed coherent states

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The quantum receiver is an important tool for overcoming the standard quantum limit (SQL) of discrimination errors in optical communication. We theoretically study the quantum receivers for discriminating ternary and quaternary phase-shift-keying coherent states in terms of average error rate and mutual information. Our receiver consists of on-off--type photon detectors and displacement operations without electrical feedforward operations. We show that for the ternary signals, the receiver shows a reasonable gain from the SQL even without feedforward. This scheme is realizable with the currently available technology. For the quaternary signals feedforward operation is crucial to overcome the SQL with imperfect devices. We also analytically examine the asymptotic limit of the performance of the proposed receiver with respect to the number of feedforward steps.

arXiv:1208.1815•Physical Review A•Oct 22, 2012•76 citations

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European Conference on Optical Communication•Sep 1, 2014•0 citations

16-QAM Quantum Receiver with Hybrid Structure Outperforming the Standard Quantum Limit

Yuan Zuo, Ke Li, Bing Zhu

Quantum receivers which can discriminate phase shift keying (PSK) and pulse position modulation (PPM) signals below the standard quantum limit have been proposed and some have been demonstrated experimentally. But for quadrature amplitude modulation (QAM) signals, few literatures have been reported so far. It is important to reduce the average error probability of QAM signals below the standard quantum limit (SQL), since these modulation have a high spectral efficiency. In this paper, we present a quantum receiver for 16-QAM signals discrimination with hybrid structure, which contains a homodyne receiver and a displacement receiver. By numerical simulation, we prove that the performance of the quantum receiver can outperform the SQL, and it can be improved by an optimized displacement.

arXiv:1412.4486•MATEC Web of Conferences•Jan 1, 2016•8 citations

Improvement of Quasi-Optimum Quantum Receiver for 3-PSK Coherent-State Signals

Asami Imaeda, Masahiro Yoshikawa, Tsuyoshi Goto Sasaki

The quasi-optimum quantum receiver proposed by Yamazaki can not necessarily overcome the standard quantum limit that is achieved by the heterodyne receiver for any average number of photons. We improve the quasi-optimum quantum receiver and show that our scheme always overcomes the standard quantum limit for 3-PSK signals.

IEEJ Transactions on Electronics Information and Systems•Jan 1, 2009•0 citations

Quantum receiver for quadrature phase-shift keying at the single photon level

Jasminder S. Sidhu, Shuro Izumi, Jonas Schou Neergaard-Nielsen +2 more

Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies. For application in optical communications, they provide improved discriminatory capabilities for multiple non-orthogonal quantum states. In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals. Our receiver surpasses the standard quantum limit and outperforms all previously known non-adaptive detectors at low input powers. Unlike existing approaches, our receiver only exploits auxiliary coherent-state fields, linear optics, and on-off photo-detection. This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.

•Sep 7, 2020•1 citation
The quantum receiver is an important tool for overcoming the standard quantum limit (SQL) of discrimination errors in optical communication. We theoretically study the quantum receivers for discriminating ternary and quaternary phase-shift-keying coherent states in terms of average error rate and mutual information. Our receiver consists of on-off--type photon detectors and displacement operations without electrical feedforward operations. We show that for the ternary signals, the receiver shows a reasonable gain from the SQL even without feedforward. This scheme is realizable with the currently available technology. For the quaternary signals feedforward operation is crucial to overcome the SQL with imperfect devices. We also analytically examine the asymptotic limit of the performance of the proposed receiver with respect to the number of feedforward steps.
Quantum receivers which can discriminate phase shift keying (PSK) and pulse position modulation (PPM) signals below the standard quantum limit have been proposed and some have been demonstrated experimentally. But for quadrature amplitude modulation (QAM) signals, few literatures have been reported so far. It is important to reduce the average error probability of QAM signals below the standard quantum limit (SQL), since these modulation have a high spectral efficiency. In this paper, we present a quantum receiver for 16-QAM signals discrimination with hybrid structure, which contains a homodyne receiver and a displacement receiver. By numerical simulation, we prove that the performance of the quantum receiver can outperform the SQL, and it can be improved by an optimized displacement.
Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies. For application in optical communications, they provide improved discriminatory capabilities for multiple non-orthogonal quantum states. In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals. Our receiver surpasses the standard quantum limit and outperforms all previously known non-adaptive detectors at low input powers. Unlike existing approaches, our receiver only exploits auxiliary coherent-state fields, linear optics, and on-off photo-detection. This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.