IEEE

A Dynamic Frequency Modulation Algorithm Based on Deep Reinforcement Learning for FDA-Assisted Satellite Covert Communication

Abstract: The frequency-offset-governed range-angle-dependent dynamic beam pattern of frequency diverse array (FDA) constitutes a critical mechanism for enhancing spatial-domain covertness in wireless ...
IEEE

Orthogonal Time-Frequency–Space Multiple Access Using Index Modulation and NOMA

Abstract: This letter introduces Non-Orthogonal Time Frequency Space Index Modulation Multiple Access (NOTFS-IMMA), an enhanced uplink random access scheme that integrates Non-Orthogonal Multiple ...