【正文】 Improved Jakes model )2c os ( 11 ?? ?tf)2co s (21 1?? Mm tf ???X X X ? + 1cos2 ?M?cos21co s2 ?M?X N2)2c os ( 11 ?? ?tf)2c os ( MM tf ?? ?)2co s (21 1?? Mm tf ???X X X ? + 1sin2 ?M?sin21sin2 ?M?X N2)(tTc)()()( tjTtTtT sc ??(N=4M+2) )2c os ( MM tf ?? ?Page:6 Improved Jakes model ?????????MnMnMnn,2,114?????????????MnNnfMnffmmn ,2,12c os1??mfwhere denotes the maximal Doppler frequency, are independent random variables uniformly distributed over for all n. )11( ??? Mnn?),[ ???Page:7 Gaussian noise filter ? The sum of two quadrature independent Gaussian random variables Independent plex Gaussian white noise source ?12?Ng* 12?Ng2Ng*2Ngmf? mf?12?Ng* 12?Ng2Ng*2Ngmf? mf)(fSDmf? mf)(fSDmf? mfIFFT IFFT ??2?????2?o90?Page:8 Suzuki proces