说明：  产生QPSK的matlab源程序，添加多普勒频移，高斯白噪声，多径效益等。
(Li proliferation QPSK cavity Daitou matlab ㄛ唗neon floor, most people ? cunning ? consultation mumps ㄛ ㄛ汒NAI婑dumb people silent worship ancestors valid bulging ﹝)