| 摘要 |
A method of transforming a serial scrambler to a parallel scrambler, a parallel scrambler and a double-edge-triggered register with XOR operation are provided. The method transforms a serial scrambler to a parallel scrambler according to a characteristic polynomial: P ( x ) = ∑ q = 0 N c q x q or b ( i ) = ∑ q = 1 N c q b ( i - q ) . The method first determines a transformation formula: b ( kN + i ) = ∑ q = 1 N c q b ( ( k - R ) N + i + R ( N - q ) ) according to the parameters of the characteristic polynomial. The parallel bits Bj=[bMj, bMj+1, . . . , bMj+M-2, bMj+M-1] are arranged in order. The transformation number R=2t (the initial number of t is 0) is set. The parallel bits are replaced by the transformation formula. When (k-R)N+i+R(N-q) is larger than Mj-1 in the transformation formula, 1 is added to t in the transformation formula R=2t and the transformation formula is re-counted. Finally, the XOR gates are connected to the registers according to a computed result from the transformation formula.
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