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cs.IT2026
Downlink Channel Matrix Estimation from PMI-Only Feedback in FDD Systems: Maximum Likelihood and Sharp Excess Risk Bound
Jinchi Chen, Mingxi Hu, Peigang Jiang +3
We study downlink channel estimation in a frequency-division duplex (FDD) massive MIMO system from PMI-only feedback under a 5G NR-type limited-feedback architecture. In this archi…
cs.IT2017
Omnidirectional Precoding and Combining Based Synchronization for Millimeter Wave Massive MIMO Systems
Xin Meng, Xiqi Gao, Xiang-Gen Xia
In this paper, we design the precoding matrices at the base station side and the combining matrices at the user terminal side for initial downlink synchronization in millimeter wav…