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Questions tagged [lfsr]

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3 votes
1 answer

Computing the decimation ratio between two m-sequences

Let's suppose I have an LFSR that generates an m-sequence $y_1[k]$ --- in other words, the LFSR has $N$ bits and $y_1[k]$ has period $m=2^N - 1$. Now suppose I know someone has decimated this and ...
Jason S's user avatar
  • 1,059
1 vote
1 answer

How have common PRBS polynomials been chosen, and what are they?

Why are most common or standard (is there actually a standard?) PRBS uneven in their number of state bits, e.g. PRBS7, PRBS15, PRBS23, if there are plenty of generator polynomials that have even, byte-...
Julien Oster's user avatar
1 vote
0 answers

Properties of pseudorandom ternary sequences

For pseudo-random binary sequences, we know there are various properties: Autocorrelation, balance, Fibonacci vs Galois modes. These are all well-known. However, for pseudo-random ternary sequences, I ...
user14717's user avatar
  • 153
0 votes
1 answer

Dithering adds harmonic distortion after filtering and upsampling

I have an issue which I wasn't able to solve for a few days. I have implemented a polyphase FIR interpolation filter within an FPGA which does interpolate by a factor of 8 or 16 times. I do accept an ...
xc3s50an's user avatar
-1 votes
1 answer

Derive the LFSR sequence from demodulated bitstream

I'm new here and hope to have good feedback from you. I'm trying to blindly demodulate an RF signal and managed to get a sequence of bits for a preamble. After some research, I'm in fact exactly in ...
Fujibayashi Nagato's user avatar