说明：  m序列是最大长度线性反馈移位寄存器序列的简称。它是带线性反馈的移位寄存器产生周期最长的一种序列。考虑图8-1所示的二进制序列产生器，它由线性反馈移位寄存器构成，式中ci为1表示连接，为0表示断开。
(M-sequence is the abbreviation of maximum length linear feedback shift register sequence. It is a sequence with the longest period generated by shift register with linear feedback. Consider the binary sequence generator shown in Figure 8-1, which consists of linear feedback shift registers, where CI is 1 for connection and 0 for disconnection.)