US 12,015,511 B1
Radio frequency (RF) communications system having RF nodes that determine a despreading sequence and phase and timing offsets for frequency agility
Nicholas T. Yaskoff, Park City, UT (US); Marc A. Padilla, Farmington, UT (US); and David M. Arnesen, West Jordan, UT (US)
Assigned to L3HARRIS TECHNOLOGIES, INC., Melbourne, FL (US)
Filed by L3HARRIS TECHNOLOGIES, INC., Melbourne, FL (US)
Filed on Dec. 1, 2022, as Appl. No. 18/060,612.
Int. Cl. H04B 1/69 (2011.01); H04B 1/707 (2011.01); H04B 1/7087 (2011.01); H04B 1/709 (2011.01); H04B 1/713 (2011.01); H04L 5/00 (2006.01); H04L 27/227 (2006.01)
CPC H04L 27/2278 (2013.01) [H04B 1/7087 (2013.01); H04B 1/709 (2013.01); H04L 5/0048 (2013.01)] 31 Claims
OG exemplary drawing
 
1. A radio frequency (RF) communications system comprising:
a first RF node configured to
transmit data including a new frequency of operation, and
transmit a sequence of pilot symbols spread with a spreading code sequence; and
a second RF node configured to
receive an incoming signal from the first RF node comprising at least the sequence of pilot symbols,
perform despreading for N sample offset delays to generate N despreading sequences for the sequence of pilot symbols,
perform a cross-correlation to select a desired despreading sequence from the N despreading sequences, and determine a phase offset and timing offset,
process the incoming signal based upon the desired despreading sequence, phase offset and timing offset, and
switch to the new frequency of operation.