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首页> 外文会议>IEEE Latin-America Conference on Communications >IEEE 802.11ac WLANs: A performance evaluation of sphere decoding and lattice reduction MMSE-SIC MIMO detectors
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IEEE 802.11ac WLANs: A performance evaluation of sphere decoding and lattice reduction MMSE-SIC MIMO detectors

机译：IEEE 802.11AC WLAN：球形解码和晶格减少MMSE-SIC MIMO探测器的性能评估

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The 802.11ac amendment, approved by the IEEE in late 2013, is an evolution of the 802.11n amendment and specifies a physical (PHY) layer based on orthogonal frequency division multiplexing (OFDM) multiple-input multiple-output (MIMO) with up to eight spatial streams (SS). The challenges and issues regarding the analyzes, design and optimization of sphere decoding (SD) and lattice-reduction mean squared error successive interference cancellation (LR MMSE-SIC) MIMO detectors in 802.11ac wireless local area networks (WLANs) are investigated in this paper. This industrial oriented paper shows simulation results that take into account fundamental operational aspects for baseband design of 802.11ac PHY layer (e.g., synchronization, channel estimation, coding) operating over spatial and frequency correlated Task Group ac (TGac) channel models. Binary convolutional code (BCC) with hard-decision Viterbi decoding is assumed in this paper. For both single-user (SU) and multi-user MIMO (MU-MEVIO) environments, we show that the SD MIMO detection allows power gains between 1 and 3 dB in relation to LR-based MMSE-SIC MIMO detection. Hence, since the SD algorithm presents a computational complexity that depends on the signal-to-noise ratio (SNR), while the LR-based MMSE-SIC MIMO detector has a fixed computation burden for a fixed number of SS and receive antennas, we have concluded that an IEEE 802.11ac PHY layer based on software-radio (SR) must have an optimized scheduling core to set on the fly the best MIMO detection scheme based on complex tradeoffs between performance and computational complexity.
机译：2013年底，IEEE批准的802.11AC修正案是802.11n修正案的演变，并指定基于正交频分复用（OFDM）多输入多输出（MIMO）的物理（PHY）层，其具有最多可实现的八个空间流（SS）。关于球体解码的分析，设计和优化的挑战和问题（SD）和晶格减少平均平均误差连续干扰消除（LR MMSE-SIC）MIMO检测器在802.11ac无线局域网（WLAN）中进行了研究。该工业面向论文显示了仿真结果，考虑到802.11ac PHY层（例如，同步，信道估计，编码）在空间和频率相关任务组AC（TGAC）信道模型上的基带设计的基本操作方面。本文假设具有硬判决维特比解码的二进制卷积码（BCC）。对于单用户（SU）和多用户MIMO（MU-MEVIO）环境，我们表明SD MIMO检测允许与基于LR的MMSE-SIC MIMO检测相关1和3 dB之间的电源增益。因此，由于SD算法提出了取决于信噪比（SNR）的计算复杂度，而基于LR的MMSE-SIC MIMO检测器具有用于固定数量的SS和接收天线的固定计算负担，我们得出结论，基于软件 - 无线电（SR）的IEEE 802.11ac PHY层必须具有优化的调度核心，可以根据性能和计算复杂性之间的复杂权衡来设置最佳的MIMO检测方案。

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