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http://dx.doi.org/10.7840/kics.2012.37A.9.753

Power Allocation Algorithms for ZF-THP Sum Rate Optimization in Multi-user Multi-antenna Systems  

Lee, Wookbong (고려대학교 전기전자전파공학과)
Song, Changick (고려대학교 전기전자전파공학과)
Lee, Sangrim (고려대학교 전기전자전파공학과)
Lee, Kilbom (고려대학교 전기전자전파공학과)
Kwak, Jin Sam (LG 전자 차세대통신연구소)
Lee, Inkyu (고려대학교 전기전자전파공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37A, no.9, 2012 , pp. 753-761 More about this Journal
Abstract
In this paper, we study a power allocation technique for Tomlinson-Harashima precoding (THP) in multi-user multiple input single output (MISO) downlink systems. In contrast to previous approaches, a mutual information based method is exploited for maximizing the sum rate of zero-forcing THP systems. Then, we propose a simple power allocation algorithm which assigns proper power level for modulo operated users. Simulation results show that the proposed scheme outperforms a conventional water-filling method, and it provides similar performance with near optimal method with much reduced complexity.
Keywords
ZF-THP; MIMO BC; Power Allocation; Mutual Information;
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