AMP-based Joint Activity Detection and Channel Estimation for Massive Grant-Free Access in OFDM-based Wideband Systems - Li, Zhiyan; Cui, Ying; Tsang, Danny H.K. (IEEE transactions on wireless communications, 2025)
Keywords: Accuracy; activity detection; AMP; Approximation algorithms; Channel estimation; Estimation; Fading channels; grant-free access; Internet of Things; Maximum likelihood estimation; mMTC; OFDM; Time-domain analysis; Wideband