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Volume 34 Issue 7
Aug.  2012
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MEI Tiancan, QIN Yusheng, YANG Hong, GAO Zhi, LI Haoran. Multilevel Semantic Maps Based on Visual Simultaneous Localization and Mapping in Dynamic Scenarios[J]. Journal of Electronics & Information Technology, 2023, 45(5): 1737-1746. doi: 10.11999/JEIT220153
Citation: Shen Hong, Zhao Chun-Ming. Efficient Iterative Detection Based on the Soft Fixed-complexity Sphere Decoder[J]. Journal of Electronics & Information Technology, 2012, 34(7): 1659-1664. doi: 10.3724/SP.J.1146.2011.00931

Efficient Iterative Detection Based on the Soft Fixed-complexity Sphere Decoder

doi: 10.3724/SP.J.1146.2011.00931
  • Received Date: 2011-09-06
  • Rev Recd Date: 2012-05-08
  • Publish Date: 2012-07-19
  • This paper proposes an efficient iterative detection algorithm for MIMO systems, based on the Soft Fixed-complexity Sphere Decoder (SFSD). The algorithm updates the soft output of SFSD using the feedback of the decoder, thus obtaining substantial iterative gain. The number of the branch metric calculation is reduced by exploiting the feature of the multi-level bit mapping constellation. The steps of the detection ordering determination and the QR decomposition are combined, in order to reduce the number of matrix inversion operations in the preprocessing stage. Simulation results in the Long Term Evolution (LTE) downlink system show that, the performance of the proposed algorithm approaches very close to that of the Maximum A Posteriori (MAP) detection with much lower complexity.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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