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Sum-Rate Capacity of Random Beamforming for Multi-Antenna Broadcast Channels with Other Cell Interference
- Authors
- Moon, Sung-Hyun; Lee, Sang-Rim; Lee, Inkyu
- Issue Date
- Aug-2011
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- MIMO broadcast channel; random beamforming; multiuser scheduling; other-cell interference
- Citation
- IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, v.10, no.8, pp.2440 - 2444
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
- Volume
- 10
- Number
- 8
- Start Page
- 2440
- End Page
- 2444
- ISSN
- 1536-1276
- Abstract
- In this letter, we analyze the sum rate of random beamforming (RBF) for downlink multi-antenna systems in the presence of other cell interference (OCI). Employing extreme value theory, an expression of the asymptotic ergodic sum rate with a large number of users is derived from the limiting distribution of the sample maximum of the received signal-to-interference-plus-noise ratio. Based on our result, the scaling law of multiuser diversity gain is also exhibited in the context of RBF systems with the OCI, which is shown to coincide with the previous result without the other cell interferers. Simulation results verify the validity of our analysis even with not so large number of users.
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Related Researcher
- Lee, In kyu
- College of Engineering (School of Electrical Engineering)