US 11,870,618 B2
Data processing for automatic modulation classification of wireless signals
Caitlyn N. Marcoux, McLean, VA (US); Ballard J. Blair, McLean, VA (US); Bindu Chandna, McLean, VA (US); and Dianne E. Egnor, McLean, VA (US)
Assigned to The MITRE Corporation, McLean, VA (US)
Filed by The MITRE Corporation, McLean, VA (US)
Filed on Dec. 17, 2020, as Appl. No. 17/125,454.
Application 17/125,454 is a continuation of application No. 16/510,207, filed on Jul. 12, 2019, granted, now 10,904,050.
Prior Publication US 2021/0144034 A1, May 13, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 27/00 (2006.01); H04L 27/20 (2006.01); H04L 27/148 (2006.01); G06N 3/08 (2023.01); G06K 9/62 (2022.01); G06F 18/2413 (2023.01); G06F 18/243 (2023.01)
CPC H04L 27/0012 (2013.01) [G06F 18/24147 (2023.01); G06F 18/24323 (2023.01); G06N 3/08 (2013.01); H04L 27/148 (2013.01); H04L 27/2014 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method for classifying a modulation scheme of a wireless signal, comprising:
receiving a modulated wireless signal;
estimating a center frequency of the wireless signal;
estimating a bandwidth of the wireless signal;
generating a resampled signal from the received modulated wireless signal wherein a rate of the resampled signal is based on the estimated center frequency and the estimated bandwidth of the wireless signal, wherein generating a resampled signal from the wireless signal comprises performing blind equalization in an iterative manner, and wherein during each iteration, the resampled signal is convolved with a plurality of equalization taps and a convolved signal envelope is used to determine whether to adjust a plurality of equalization weights; and
classifying the received wireless signal using a modulation classifier to a modulation scheme based on the resampled signal.