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http://dx.doi.org/10.7840/kics.2012.37A.12.1093

Interference Space Reuse and the Adoption Strategy through QoS Constraints in Three-Cell Downlink MIMO Interference Channels  

Yoon, Jangho (KAIST 전기 및 전자공학과 이동통신 연구실)
Lee, Hwang Soo (KAIST 전기 및 전자공학과 이동통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37A, no.12, 2012 , pp. 1093-1105 More about this Journal
Abstract
We propose an interference space reuse (ISR) algorithm for the MU-MIMO design in 3-cell downlink interference channels. Also, we provide a strategy for the adoption of the ISR scheme in the cellular network. In the multicell interference channels, the cell edge users may undergo severe interferences and their signals should be protected from the interferers for reliable transmissions. However, the intra cell users do not only experience small interferences but also they require small transmission power for stable communication. We provide a vector design algorithm based on ISR, where intra cell users are served through reusing the cell edge users' interference space. The performance enhancement reaches 20% compared to the fractional frequency reuse (FFR) scheme combined with IA through the scheduling between the cell edge users and the intra cell users. Also, it can be used to enhance the cell edge throughput when the quality of service (QoS) requirements of the intra cell users are fixed.
Keywords
interference space reuse; MU-MIMO; interference alignment; user pairing;
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