Determination of quasiprobability distributions in terms of probability distributions for the rotated quadrature phase

It is shown that the probability distribution for the rotated quadrature phase [a^^∘exp(i{θ})+a exp(-i{θ})]/2 can be expressed in terms of quasiprobability distributions such as P, Q, and Wigner functions and that also the reverse is true, i.e., if the probability distribution for the rotated quadrature phase is known for every {θ} in the interval 0{≤}{θ}<{π}, then the quasiprobability distributions can be obtained.