说明：  任意级移位寄存器的全部M序列的构成法，根据m序列的构造，给出了一个一般方法，用计算机产生任意级移位寄存器的全部非平移等价的M序列
(Shift Registers arbitrary class of all M sequences constitute a law, according to the structure of m sequences, gives a general approach, using computer generated random-level shift register all the non-translation equivalent of M sequence)