arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0906.0840cs.ITmath.IT
收藏

软输入软输出单树搜索球译码

Soft-Input Soft-Output Single Tree-Search Sphere Decoding

Christoph Studer, Helmut Bölcskei

摘要:

软输入软输出(SISO)检测算法形成迭代解码的基础。SISO检测的计算复杂性通常对实际的接收机实现方式构成重大挑战,特别是在多输入多输出(MIMO)无线通信系统的上下文中。在本文中,我们提出了一种低复杂度的SISO球解码算法,基于单树搜索范式最初提出的软输出MIMO检测在Studer,等人,IEEE J-SAC,2008年。新算法将裁剪的外在对数似然比(LLR)到树搜索,这导致显着的复杂性节省,并允许通过调整一个单一的参数,以覆盖一个大的性能/复杂性权衡区域。此外,我们提出了一种新的方法来纠正近似LLR-从次优检测器-这(通常显着)提高检测性能在低附加计算复杂性。

英文摘要:

Soft-input soft-output (SISO) detection algorithms form the basis for iterative decoding. The computational complexity of SISO detection often poses significant challenges for practical receiver implementations, in particular in the context of multiple-input multiple-output (MIMO) wireless communication systems. In this paper, we present a low-complexity SISO sphere-decoding algorithm, based on the single tree-search paradigm proposed originally for soft-output MIMO detection in Studer, et al., IEEE J-SAC, 2008. The new algorithm incorporates clipping of the extrinsic log-likelihood ratios (LLRs) into the tree-search, which results in significant complexity savings and allows to cover a large performance/complexity tradeoff region by adjusting a single parameter. Furthermore, we propose a new method for correcting approximate LLRs --resulting from sub-optimal detectors-- which (often significantly) improves detection performance at low additional computational complexity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑