SINR = GP T B P loss ( I in - cell + I out - of - cell + N ) = GP T B P loss I in - cell ( 1 + I out - of - cell + N I in - cell ) Eq . ( 4 ) In this expression, G is the processing gain, PT is the transmitted power, Ploss is the path loss, Iin-cell is the interference from users in the cell, Iout-of-cell is the interference from users out of the cell, B is a antenna pattern factor, and N is the n