When DW=0, the residual sequence has completely positive autocorrelation,

When dw = (0 0,2), the residual sequence has positive autocorrelation,

When DW=2, the residual sequence has no autocorrelation,

When dw = (2 2,4), the residual sequence has negative autocorrelation,

When DW=4, the residual sequence has completely negative autocorrelation.