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arXiv 1303.0699cs.ITmath.IT
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MIMO系统中基于优势的低复杂度球形译码器

Low-complexity dominance-based Sphere Decoder for MIMO Systems

Gianmarco Romano, Domenico Ciuonzo, Pierluigi Salvo Rossi, Francesco Palmieri

摘要:

球形解码器(SD)是一种有吸引力的低复杂度的替代最大似然(ML)检测在各种通信系统中。它也被用于多输入多输出(MIMO)系统中,其中最佳检测器的计算复杂性随着发射天线的数量呈指数增长。我们提出了一个增强版的SD的基础上,从最坏情况下的干扰条件,我们称之为优势条件的额外的成本函数。建议的检测器,国王球解码器(KSD),具有计算复杂性,结果是不大于球解码器的复杂性和数值模拟表明,复杂性降低通常是相当显着的。

英文摘要:

The sphere decoder (SD) is an attractive low-complexity alternative to maximum likelihood (ML) detection in a variety of communication systems. It is also employed in multiple-input multiple-output (MIMO) systems where the computational complexity of the optimum detector grows exponentially with the number of transmit antennas. We propose an enhanced version of the SD based on an additional cost function derived from conditions on worst case interference, that we call dominance conditions. The proposed detector, the king sphere decoder (KSD), has a computational complexity that results to be not larger than the complexity of the sphere decoder and numerical simulations show that the complexity reduction is usually quite significant.

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