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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN 印刷: 0040-2508
ISSN オンライン: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v75.i7.40
pages 607-620

A NOVEL INDEPENDENT PROCESSING LLL ALGORITHM FOR MIMO DETECTION

L. Huazhang
Network Technology Research Institute of China Unicom, 9, Shoutinanlu Road, Beijing,100048, China
L. Jianping
School of Information Engineering Communication University of China

要約

The Lenstra-Lenstra-Lovasz (LLL) algorithm is an effective lattice reduction algorithm in the multi-input-multi-output (MIMO) systems. But LLL converges slowly and sometimes needs higher orders of operation time. This shortcoming is also bad for design of hardware design. In this paper, a low-complexity independent process LLL algorithm that seperates the whole procedure of LLL algorithm into two independent parts is proposed. The column swap procedure of the novel algorithm is modified by searching for the potential column swaps through the whole basis. Until no basis is searched for disposal, the column swap procedure terminates and a global size reduction is following the next. This new idea aims to largely decrease the computation complexity of MIMO detection process so that to save the detection time. We mainly design two schemes of criteria for how to select potential column swaps: offset coefficient selection criterion (OCSC) and maximum steepest descent criterion (MSDC). Simulation results show both OCSC-LLL and MSDC-LLL can reduce computation complexity and performance loss compared to the LLL algorithm is acceptable.


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