Quadrature phase shift keying coherent state discrimination via a hybrid receiver
Quadrature phase shift keying coherent state discrimination via a hybrid receiver
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DOI：
10.1088/1367-2630/14/8/083009
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发表时间：
2012-04
影响因子：
3.3
通讯作者：
C. Muller;M. Usuga;C. Wittmann;M. Takeoka;C. Marquardt;U. Andersen;G. Leuchs
中科院分区：
文献类型：
--
作者：
C. Muller;M. Usuga;C. Wittmann;M. Takeoka;C. Marquardt;U. Andersen;G. Leuchs
提出并实验证明了一种适用于QPSK协议的近乎最优的鉴别方案。我们在理论上证明了我们的混合方案的性能在所有信号幅度上都优于标准的外差检测方案，并用我们的实验结果支持了预测。此外，我们的方案在高度衰减的信号领域提供了迄今为止最好的性能。该判别器由正交量测、条件位移和阈值检测器组成。
We propose and experimentally demonstrate a near-optimal discrimination scheme for the quadrature phase shift keying (QPSK) protocol. We show in theory that the performance of our hybrid scheme is superior to the standard scheme—heterodyne detection—for all signal amplitudes and underpin the predictions with our experimental results. Furthermore, our scheme provides hitherto the best performance in the domain of highly attenuated signals. The discrimination is composed of a quadrature measurement, a conditional displacement and a threshold detector.