用于相干态判别量子受限的符号盲信道估计
Quantum-Limited Symbol-Blind Channel Estimation for Coherent State Discrimination
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中文总结 AI 辅助
研究光子匮乏相干链路中残余色散问题，通过建立量子极限，利用多输出量子脉冲门结合光子数分辨检测，实现群延迟和二阶色散的盲联合估计，支持在湍流衰落时低于标准量子极限接收。
中文摘要 AI 辅助
在光子匮乏的相干链路中，残余色散会破坏时间模式匹配。对于已知频谱模式下等概率的M元PSK相干态，在符号和载波相位未知时，我们确定了群延迟和二阶色散的盲联合估计的量子极限：消除公共相位后，由中心生成器的协方差单独设置为4NsC。具有光子数分辨检测的多输出量子脉冲门在本地实现了该极限，并支持在湍流衰落条件下低于标准量子极限的接收。
英文摘要
Residual dispersion breaks temporal-mode matching in photon-starved coherent links. For equiprobable $M$-ary PSK coherent states in a known spectral mode, with unknown symbols and carrier phase, we establish the quantum limit for blind joint estimation of group delay and second-order dispersion: after eliminating the common phase, it is $4N_s\mathbf{C}$, set by the covariance of the centered generators alone. A multi-output quantum pulse gate with photon-number-resolving detection locally attains it and supports reception below the standard quantum limit under turbulent fading.
