US 11,855,683 B2
Configurable acquisition engine for receiver of spread spectrum signals
Phillip M. Izdebski, El Segundo, CA (US); Gennady Y. Poberezhskiy, El Segundo, CA (US); and Matthew C. Dusard, El Segundo, CA (US)
Assigned to Raytheon Company, Waltham, MA (US)
Filed by Raytheon Company, Waltham, MA (US)
Filed on Jun. 21, 2022, as Appl. No. 17/845,197.
Claims priority of provisional application 63/216,048, filed on Jun. 29, 2021.
Prior Publication US 2022/0416840 A1, Dec. 29, 2022
Int. Cl. H04B 1/71 (2011.01); H04B 1/7093 (2011.01)
CPC H04B 1/7101 (2013.01) [H04B 1/7093 (2013.01); H04B 1/7102 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A configurable direct sequence (DS) spread spectrum (SS) electronic device including:
a fast Fourier transform (FFT) module configured to:
receive an input signal;
compute an FFT of the input signal;
output n bins of frequency data having an initial frequency spacing, wherein n is an integer greater than 1, and wherein each of the n bins:
corresponds to a range of frequencies matching the initial frequency spacing; and
includes a magnitude of a complex-valued FFT output for the bin;
a frequency-domain decimation filter configured to:
utilize m bins of the n bins of frequency data from the FFT module having the initial frequency spacing, wherein m is an integer greater than 1; and
output q bins of the n bins of frequency data having a larger frequency spacing, wherein q is an integer greater than 1, and wherein q<m; and
memory configured to receive and store a portion of the n bins of frequency data.