Uporaba
38 – Use of pseudo-random sequences
Two-valued autocorrelation with a
single very pronounced peak:
- synchronization headers for
data frames
- spreading sequences in CDMA
- accurate time transfer in radio
navigation (GPS, GLONASS)
LFSR pseudo-random sequences
are of NO cryptographic value:
algorithm Berlekamp-Massey 1969
Peak-to-average power ratio:
Perfect frequency spectrum of
uniformly-spaced lines and
simple generation/checking:
- test sequences for all kinds of
telecommunication links
- data scrambling (randomization)
as part of line coding
LFSR sequences are the result of
pure mathematics that does not
appear anywhere else in nature!
How to present ourselves to the
inhabitants of a neighbor galaxy?
How to find out that they look for us?