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Reduced Complexity Schnorr-Euchner Sphere Decoders in MIMO Applications  

Le Minh-Tuan (School of Engineering, Information and Communications University (ICU))
Pham Van-Su (School of Engineering, Information and Communications University (ICU))
Mai Linh (School of Information and Communications University (ICU))
Yoon Gi-Wan (Information and Communications University (ICU))
Abstract
We present two techniques based on lookup tables to reduce complexity of the well-known Schnorr-Euchner (SE) sphere decoder (SD) without introducing performance degradation. By the aid of lookup tables, the computational loads caused by the SE enumeration and decision feedback are reduced at the cost of higher storage capacity. Simulation results are provided to verify performance and complexity of the proposed decoders.
Keywords
Multiple-input multiple-output; sphere decoding; maxmum likelihood detection; wireless communication;
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