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http://dx.doi.org/10.5573/ieie.2017.54.7.12

Dijkstra's Search-Based Sphere Decoding with Complexity Constraint  

Yoon, Hye-yeon (Department of Electronics and Information Engineering, Korea Aerospace University)
Kim, Tae-Hwan (Department of Electronics and Information Engineering, Korea Aerospace University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.54, no.7, 2017 , pp. 12-18 More about this Journal
Abstract
This paper presents a Dijkstra's-search-based sphere decoding (SD) algorithm with limited complexity for the symbol detection in MIMO communication systems. The Dijkstra search-based SD is efficient to achieve a near-optimal error rate in the MIMO symbol detection, but has a critical problem in that its complexity is variable and can correspond to that of the exhaustive search in the worst case. The proposed algorithm limits the computations while achieving a near-optimal error rate. Simulation results show that the error rate is near optimal even with the limited complexity.
Keywords
sphere decoding; symbol detection; multiple-input multiple-output; tree search;
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