Scramble 有擾亂的意思，協(xié)議：3GPP2 C.S0024-A 12.3.1.3.2.3.3 Scrambling看看有沒有幫助，我自己看的實(shí)在有點(diǎn)暈。
The output of the encoder shall be scrambled to randomize the data prior to modulation.The scrambling sequence shall be equivalent to one generated with a 17-tap linear feedback shift register with a generator sequence of h(D) = D17 + D14 + 1, as shown in Figure 12.3.1.3.2.3.3-1. At the start of the physical layer packet, the shift register shall be initialized to the state [1111111r5r4r3r2r1r0d3d2d1d0]. The r5r4r3r2r1r0 bits shall be equal to the 6-bit preamble MACIndex value (see Table 12.3.1.3.2.1.3-1). The d3d2d1d0 bits shall be determined by the data rate, as specified in Table 12.3.1.3.2.3.3-1. The initial state shall generate the first scrambling bit. The shift register shall be clocked once for every encoder
output code symbol to generate a bit of the scrambling sequence. Every encoder output
code symbol shall be XOR’d with the corresponding bit of the scrambling sequence to yield
a scrambled encoded bit.