A Barker code or Barker sequence is a finite sequence of N values of +1 and −1,
- for
such that the off-peak autocorrelation coefficients
are as small as possible:
for all . Only eight Barker sequences are known, all of length N at most 13. Barker's 1953 paper asked for sequences with the stronger condition
only three such sequences are known.
Read more about Barker Code: Known Barker Codes, Barker Modulation
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