空時正交編碼源程序，參考文獻： V.Tarokh,H. Jafarkhani,and A. R. Calderbank "Space-Time Codes from
％Orthogonal Designs",IEEE Trans. Inform. Theory VOL. 45,NO. 5,JULY 1
computes the eigenvalues of a symmetric tridiagonal
* matrix T. The user may ask for all eigenvalues, all eigenvalues
in the half-open interval (VL, VU], or the IL-th through IU-th eigenvalues.
