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A nonlinear-feedback shift register (NLFSR) is a shift register whose input bit is a non-linear function of its previous state. For an n-bit shift register r its next state is defined as: , where f is the non-linear feedback function.

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  • A nonlinear-feedback shift register (NLFSR) is a shift register whose input bit is a non-linear function of its previous state. For an n-bit shift register r its next state is defined as: , where f is the non-linear feedback function. (en)
  • 非线性反馈移位寄存器(NLFSR, Nonlinear feedback shift register)是相对于線性反饋移位暫存器而言的。它们的大体电路逻辑相似,仅仅在于NLFSR的反馈逻辑是由异或门和与门构成的,而LFSR中仅存在异或门。从代数表达式来看,异或门是加法(+),而与门是乘法(*)。由加法构成的反馈逻辑,其反馈表达式的最高项次数不会增长,而由乘法参与的反馈表达式项次数会增长、并可能超过定义多项式的最高项。 数学上的相关讨论可以参考:Janusz Szmidt: "The Search and Construction of Nonlinear Feedback Shift Registers",https://web.archive.org/web/20140529084401/http://www.math.uni-magdeburg.de/~fq11/talks/Szmidt.pdf (zh)
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  • A nonlinear-feedback shift register (NLFSR) is a shift register whose input bit is a non-linear function of its previous state. For an n-bit shift register r its next state is defined as: , where f is the non-linear feedback function. (en)
  • 非线性反馈移位寄存器(NLFSR, Nonlinear feedback shift register)是相对于線性反饋移位暫存器而言的。它们的大体电路逻辑相似,仅仅在于NLFSR的反馈逻辑是由异或门和与门构成的,而LFSR中仅存在异或门。从代数表达式来看,异或门是加法(+),而与门是乘法(*)。由加法构成的反馈逻辑,其反馈表达式的最高项次数不会增长,而由乘法参与的反馈表达式项次数会增长、并可能超过定义多项式的最高项。 数学上的相关讨论可以参考:Janusz Szmidt: "The Search and Construction of Nonlinear Feedback Shift Registers",https://web.archive.org/web/20140529084401/http://www.math.uni-magdeburg.de/~fq11/talks/Szmidt.pdf (zh)
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  • Nonlinear-feedback shift register (en)
  • 非线性反馈移位寄存器 (zh)
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