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提出了一种由同一n级线性反馈移位寄存器的φ(2~n-1)/n种不同m序列构造一个非线性序列的新方法,可增加序列的线性复杂度。通过计算机模拟,发现该序列有尖锐的自相关特性以及近似于白噪声的频谱特性,是一种良好的伪随机序列,可用作密钥序列。
A new method of constructing a nonlinear sequence from φ (2 ~ n-1) / n different m sequences of the same n-stage linear feedback shift register is proposed, which can increase the linear complexity of the sequence. Through computer simulation, it is found that this sequence has sharp autocorrelation and spectral characteristics similar to white noise. It is a good pseudo-random sequence and can be used as a key sequence.