MIMO
Practical Massive MIMO (multiple input, multiple output). MIMO is an antenna technology for wireless communications in which multiple antennas are used at both the transmitter and receiver.
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Practical Massive MIMO
- Remove the pilot contamination problem
- Channel estimation based on subspace approach, random matrix theory
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Codebooks for massive MIMO
- Closed form low coherence frames / Grassmannian codebooks for k-dimensional subspaces in 2m–dimensional spaces, some optimal
- Stiefel & Grassmannian codebooks
- Convergence of gradient search for low-dimensional matrix completion in high-dimensional spaces
- Minimum distance bounds on Stiefel and Grassmannian manifolds
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Distributed Antenna Systems (DAS)
- Over the air synchronization of remote radio units
- Centralized base band processing
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