  The solution for the nucleon-nucleon T matrix in the framework of the
covariant Bethe-Salpeter approach for a two spin-one-half particle system with
a separable kernel of interaction is analyzed. The explicit analytical
connection between parameters of the separable kernel and low energy scattering
parameters, deuteron binding energy and phase shifts is established.Covariant
separable kernels for positive-energy partial channels with total angular
momentum J=0 (1S0+, 3P0+) and J=1 (3S1+-3D1+, 1P1+, 3P1+) are constructed by
using obtained relations.
