中文说明： SCHURCOHN(A) 解决了反射系数的多项式 A 与学位 M.如所述的 Schur 科恩稳定性标准，反射系数的绝对值必须是小于 1，极点在单位内设 圈子。函数的输出是排列按降序 （即 K(M)、 K(M-1) 等） 的反射系数。
English Description：
SCHURCOHN(A) solves for the reflection coefficients of polynomial A with degree M. As stated in the Schur-Cohn stability criterion, the absolute value of the reflection coefficients must be less than 1 for the poles to be located inside the unit circle. The output of the function are the reflection coefficients arranged in descending order (i.e. K(M), K(M-1), etc).