US 12,432,007 B2
System and method for symbol decoding in high frequency (hf) communication channels
Ion Matei, Mountain View, CA (US); and Johan de Kleer, Los Altos, CA (US)
Assigned to Xerox Corporation, Norwalk, CT (US)
Filed by Palo Alto Research Center Incorporated, Palo Alto, CA (US)
Filed on Oct. 11, 2022, as Appl. No. 17/963,894.
Prior Publication US 2024/0129059 A1, Apr. 18, 2024
Int. Cl. H04L 1/00 (2006.01); G06N 3/045 (2023.01); G06N 3/088 (2023.01)
CPC H04L 1/0009 (2013.01) [G06N 3/045 (2023.01); G06N 3/088 (2013.01); H04L 1/0036 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for reconstructing symbols transmitted over a high frequency (HF) communication channel, the method comprising:
receiving, at a receiver, a radio frequency (RF) signal carrying an input data frame and transmitted over the HF communication channel, wherein the input data frame comprises a number of known symbols followed by a number of unknown symbols;
determining a set of channel parameters associated with the HF communication channel based on the received RF signal and the known symbols; and
reconstructing, using a machine-learning technique, the unknown symbols based on the determined channel parameters and the received RF signal, wherein the reconstruction comprises:
determining, based on the received RF signal, a current mode of the HF communication channel;
selecting, from a plurality of decoder models which are previously trained offline, a decoder model corresponding to the current mode of the HF communication channel; and
reconstructing the unknown symbols based on the channel parameters and the selected decoder model.