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Detection of quantum signals of random phase in thermal noise (Corresp.)

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1 Author(s)

When the phase of the transmittance between a unimodal transmitter and a unimodal receiver is uniformly distributed over (0,2\pi) , the density operator of the received signal field commutes with the photon number operator, and the optimum detector of the signal counts photons. A simple formula is given for the probability generating function of the number of photons in terms of the quasi-probability distribution of the transmitted signal. It is used to determine the average error probability of an on-off binary communication system transmitting two-photon coherent-state signals, received in the presence of thermal noise.

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Information Theory, IEEE Transactions on  (Volume:26 ,  Issue: 6 )