中文说明：利用R的toepliz性质，是实数，则r也应该是实数，是实信号r(-m)=r(m)-Toepliz the nature of the use of R is real number, then r should be real, real signal r (-m) = r (m)
English Description：
Toepliz the nature of the use of R is real number, then r should be real, real signal r (-m) = r (m)