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- Title
Optimal Multiuser Diversity in Multi-Cell MIMO Uplink Networks: User Scaling Law and Beamforming Design.
- Authors
Bang Chul Jung; Su Min Kim; Won-Yong Shin; Hyun Jong Yang
- Abstract
We introduce a distributed protocol to achieve multiuser diversity in a multicell multiple-input multiple-output (MIMO) uplink network, referred to as a MIMO interfering multiple-access channel (IMAC). Assuming both no information exchange among base stations (BS) and local channel state information at the transmitters for the MIMO IMAC, we propose a joint beamforming and user scheduling protocol, and then show that the proposed protocol can achieve the optimal multiuser diversity gain, i.e., KMlog(SNRlog N), as long as the number of mobile stations (MSs) in a cell, N, scales faster than SNRKM-L/1-ε for a small constant ε > 0, where M, L, K, and SNR denote the number of receive antennas at each BS, the number of transmit antennas at each MS, the number of cells, and the signal-to-noise ratio, respectively. Our result indicates that multiuser diversity can be achieved in the presence of intra-cell and inter-cell interference even in a distributed fashion. As a result, vital information on how to design distributed algorithms in interference-limited cellular environments is provided.
- Subjects
BEAMFORMING; SIGNAL processing; TRANSMITTERS (Communication); ALGORITHMS; ANTENNAS (Electronics)
- Publication
Entropy, 2017, Vol 19, Issue 8, p393
- ISSN
1099-4300
- Publication type
Article
- DOI
10.3390/e19080393