Study for quantum receiver performance of quantum DPSK signal

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  • 量子DPSK 信号の量子受信機性能に関する考察
  • リョウシ DPSK シンゴウ ノ リョウシ ジュシンキ セイノウ ニ カンスル コウサツ

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Abstract

近年，超高速化を目指して光の相対位相情報を利用したDifferential Phase Shift Keying(DPSK)や4-DPSK通信の研究が活発に行われている．これまで，量子信号検出理論に基づいて，絶対位相が既知のPSKやQAM通信の量子受信性能の研究が発表されている．しかし，DPSK信号による通信系の量子力学的表現や解析に関する研究はなされていない．本研究は，DPSKの量子力学的表現を示し，具体例を示しながら，それらの量子受信機の性能解析を示す． Recently, Differential Phase Shift Keying (DPSK) using relative phase information on light and 4-DPSK communication are actively researched aiming at the super-speed-up. The absolute phase that is based on the quantum signal detection theory up to now is announced, and it announces and the research of the quantum reception performance of already-known PSK and the QAM communication is announced. However, neither the quantum expression of the communication system by the DPSK signal nor the research on the analysis are performed. The present study shows the quantum expression of DPSK, and shows the analysis of performance on those quantum receivers while showing the concrete example.

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