A beacon-antenna pre-equalization scheme shifts grant-free massive MIMO random access to a semi-blind iterative detection problem with coarse data detection, data-aided channel estimation, and fine data detection.
Joint activity detection and channel estimation in massi ve MIMO systems with angular domain enhancement,
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Pre-Equalization Aided Grant-Free Massive Access in Massive MIMO System
A beacon-antenna pre-equalization scheme shifts grant-free massive MIMO random access to a semi-blind iterative detection problem with coarse data detection, data-aided channel estimation, and fine data detection.