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An efficient implementation strategy for the multiple-input-multiple-output (MIMO) sphere detector (SD) is proposed and analyzed in this paper. The proposed method incorporates a dynamic information storage-and-retrieval mechanism to avoid repetitive computation of previously processed results. A memory-access architecture is devised to facilitate the implementation. The proposed method remarkably benefits the depth-first SD and its variants, as verified by a detailed complexity analysis and experimental results.
Date of Publication: Sept. 2012