  We propose a method of the Bell bases decomposition to teleport an arbitrary
unknown N-qubit state through a nonmaximally entangled quantum channel, and
give the universal decomposition matrix of N-qubit. Using the decomposition
matrix, we can easily obtain the collapsed state at the receiver site. The
inverse matrix that the decomposition matrix is just the transformation matrix
that the receiver can manipulate. The decomposition matrix is a function of the
parameters of the quantum channel. After defining the sub-matrix of the quantum
channel, we find that the decomposition matrix is a tensor product of the
sub-matrixes.
