US Patent No. 9,936,514


Patent No. 9,936,514
Issue Date April 03, 2018
Title Lpi/lpd Communication Systems
Inventorship Steve J Shattil, Cheyenne, WY (US)
Robi Sen, McLean, VA (US)
Assignee Department 13, LLC, Columbia, MD (US)

Claim of US Patent No. 9,936,514

1. A communication method, comprising:selecting a decoy data signal vector for transmission;
generating a MIMO precoding matrix from a message to be sent; and
multiplying the decoy data signal vector by the MIMO precoding matrix for constructing a precoded signal to be transmitted, the precoded signal comprising information-bearing synthesized channel distortions;
multiplexing a reference signal and the precoded signal for transmission to a receiver; wherein the receiver decrypts the message in the precoded signal based on channel estimation performed on the reference signal.