US 12,113,608 B2
Transmission of atmospheric ducted communication signals
Richard Lagrotta, Fairfax, VA (US); John Kleider, Fairfax, VA (US); and George Kannell, Fairfax, VA (US)
Assigned to General Dynamics Mission Systems, Inc., Fairfax, VA (US)
Filed by General Dynamics Mission Systems, Inc., Fairfax, VA (US)
Filed on May 18, 2022, as Appl. No. 17/664,001.
Prior Publication US 2023/0403073 A1, Dec. 14, 2023
Int. Cl. H04B 7/22 (2006.01); H04B 7/26 (2006.01)
CPC H04B 7/22 (2013.01) [H04B 7/2662 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for transmitting a data signal comprising:
estimating an altitude of an atmospheric refractive layer;
encoding a data signal with a first synchronization sequence to generate a first transmission signal and encoding the data signal with a second synchronization sequence to generate a second transmission signal;
transmitting, using a first array element, the first transmission signal at a first elevation angle determined in response to the altitude of the atmospheric refractive layer;
transmitting, using a second array element, the second transmission signal at a second elevation angle determined in response to the altitude of the atmospheric refractive layer;
receiving, at a receiver, the first transmission signal and the second transmission signal;
isolating the data signal from the first transmission signal in response to the first synchronization sequence to generate a first isolated data signal and determining a first offset of the first isolated data signal;
isolating the data signal from the second transmission signal in response to the second synchronization sequence to generate a second isolated data signal and determining a second offset of the second isolated data signal; and
combining the first isolated data signal and the second isolated data signal in response to the first offset and the second offset.