Feb 6, 2017 #1 R rlagusrb24 Newbie Joined Aug 6, 2016 Messages 5 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 58 Hi. I'm studying about LFSR recently, but there is some problem. This is 3-bit LFSR and my book said that this circuit is expressed by primitive polynomial of p=y^3+y+1 I thought that Y3's value is y and next Y3's value is p. But after I have calculated it, I saw it was wrong. So, I have substituted each Y1 to Y3 values to y but it doesn't shows any relative value to Y1 to Y3. What is p and y's actual meaning in LFSR? Is it related to any value of each DFF's output?
Hi. I'm studying about LFSR recently, but there is some problem. This is 3-bit LFSR and my book said that this circuit is expressed by primitive polynomial of p=y^3+y+1 I thought that Y3's value is y and next Y3's value is p. But after I have calculated it, I saw it was wrong. So, I have substituted each Y1 to Y3 values to y but it doesn't shows any relative value to Y1 to Y3. What is p and y's actual meaning in LFSR? Is it related to any value of each DFF's output?
Feb 6, 2017 #2 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,404 Helped 14,749 Reputation 29,780 Reaction score 14,094 Trophy points 1,393 Location Bochum, Germany Activity points 298,026 The polynomial specifies the feedback taps. A brief explanation how to read the polynomial https://en.wikipedia.org/wiki/Linear-feedback_shift_register#Fibonacci_LFSRs
The polynomial specifies the feedback taps. A brief explanation how to read the polynomial https://en.wikipedia.org/wiki/Linear-feedback_shift_register#Fibonacci_LFSRs