The inverse-squeezing Kennedy receiver converts transmitter-side squeezing into enhanced photon-number contrast, surpassing the standard quantum limit for squeezed-state BPSK near mean photon number N=0.3 and the coherent-state Helstrom bound near N=0.4.
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Near-optimal discrimination of displaced squeezed binary signals using displacement, inverse-squeezing, and photon-number-resolving detection
The inverse-squeezing Kennedy receiver converts transmitter-side squeezing into enhanced photon-number contrast, surpassing the standard quantum limit for squeezed-state BPSK near mean photon number N=0.3 and the coherent-state Helstrom bound near N=0.4.