An expanded GNILC algorithm using a DCT along the frequency axis, a bias-corrected AIC for foreground degrees of freedom, and an RPCA-embedded blind variant recovers simulated 21-cm power spectra from SKA-MID and BINGO with roughly 10-20 percent bias in selected multipole ranges.
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Expanded Generalized Needlet Internal Linear Combination (eGNILC) Framework for the 21-cm Foreground Removal
An expanded GNILC algorithm using a DCT along the frequency axis, a bias-corrected AIC for foreground degrees of freedom, and an RPCA-embedded blind variant recovers simulated 21-cm power spectra from SKA-MID and BINGO with roughly 10-20 percent bias in selected multipole ranges.