| 一种改进的空时Lattice译码算法 |
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| 引用本文： | 苏昕,顾华玺,孙永军,易克初.一种改进的空时Lattice译码算法[J].西北大学学报,2006,36(3):377-380. |
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| 作者姓名： | 苏昕 顾华玺 孙永军 易克初 |
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| 作者单位： | 西安电子科技大学综合业务网国家重点实验室 陕西西安710071 |
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| 基金项目： | 国家自然科学基金资助项目(60572148)，西安电子科技大学研究生创新基金资助项目(050710) |
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| 摘 要： | 目的降低分层空时接收机的球形译码算法复杂度,提高运算速度。方法对信号矢量的分量进行分组,每个分组内部采用球形译码算法进行检测,而各个分组之间通过判决反馈的方式进行干扰抵消。结果计算机仿真结果表明,新算法能够明显地降低接收机译码过程的计算量。结论由于在各个分组内部进行球形译码,大大降低了最坏情况下的计算量,从而简化了接收机复杂度。
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| 关 键 词： | 分层空时接收机 球形译码 复杂度 |
| 文章编号： | 1000-274X(2006)03-0377-04 |
| 收稿时间： | 12 23 2004 12:00AM |
| 修稿时间： | 2004年12月23 |
An improved space-time Lattice decoding algorithm |
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| SU Xin,GU Hua-xi,SUN Yong-jun,YI Ke-chu.An improved space-time Lattice decoding algorithm[J].Journal of Northwest University(Natural Science Edition),2006,36(3):377-380. |
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| Authors: | SU Xin GU Hua-xi SUN Yong-jun YI Ke-chu |
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| Abstract: | Aim In order to reduce the computation complexity and improve processing speed of sphere decoding based layered space-time receiver a new receiver scheme with groping sphere decoding structure is presented.Methods The elements of signal vector are divided into several groups.The receiver performs sphere decoding for the elements within the same group. The already detected groups are cancelled by using decision feed equalization.Results Simulation results show that the decoding complexity of the new algorithm is much lower compared to that of the original sphere decoding algorithm.Conclusion Since the sphere decoding are performed in each group separately the worst case complexity of sphere decoding is reduced dramatically. |
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| Keywords: | layered space-time receiver sphere decoding(SD) complexity |
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