In the present paper the localization of poloidal correlation reflectometry (PCR) is treated analytically for arbitrary density and turbulence profiles. The 3D WKB approach is used to calculate the fluctuation reflectometry signal and the PCR cross correlation function produced by long-scale turbulence. The study is performed in cylindrical geometry correctly accounting for the plasma curvature effects. The probing wave propagation is described in paraxial approximation accounting for the refraction and diffraction effects. The obtained explicit expressions for the PCR characteristics can be used for determination of the turbulence level and the velocity distribution from the experimental data for arbitrary density profiles.