US 11,929,778 B2
Artifact free chaotic spread spectrum communication
Marc Severo, Centreville, VA (US); and Anuj Junankar, Ashburn, VA (US)
Assigned to Spectric Labs, Inc., Fairfax, VA (US)
Filed by Spectric Labs, Inc., Fairfax, VA (US)
Filed on May 23, 2022, as Appl. No. 17/750,913.
Prior Publication US 2023/0378998 A1, Nov. 23, 2023
Int. Cl. H04B 1/709 (2011.01); H04B 1/707 (2011.01); H04B 1/7093 (2011.01); H04B 1/7176 (2011.01)
CPC H04B 1/709 (2013.01) [H04B 1/707 (2013.01); H04B 1/7093 (2013.01); H04B 1/7176 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An apparatus for communicating comprising:
a) a spreader configured to generate a spread spectrum signal in which a transmitted power level is spread below a noise floor, said spread spectrum signal including a plurality of chips generated from a pseudorandom sequence and a plurality of mapped symbols;
b) a chaotic scrambler configured to scramble the spread spectrum signal to generate a chaotic phase shifted spread spectrum signal by sequentially applying a plurality of chaotic phase shifts to the plurality of chips; and
c) a pulse shape filter coupled to the chaotic scrambler and configured to filter the chaotic phase shifted spread spectrum signal to reduce one or more spectral analysis features in the chaotic phase shifted spread spectrum signal.