Performance Comparison of Linear and Non Linear Interference Cancellation Techniques for 3.466 Gbps WLAN

2019 International Biomedical Instrumentation and Technology Conference (IBITeC) Pub Date : 2019-10-01 DOI:10.1109/IBITeC46597.2019.9091712

W. Syafei, Fathia Isralestina, C. E. Widodo

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引用次数: 1

Abstract

The new WLAN standard IEEE802.11ac provides data rate up to 3.466Gbps by occupying 80MHz of bandwidth and eight spatial streams in modulation coding scheme index 9. However, these multiple streams configuration introduce dense interferences. This paper presents linear and non-linear techniques to cancel the interferences in very high data rate WLAN system. Those techniques were compared in term of performance and complexity. They are not only canceling the interference but also combining the multipath gain to obtain optimal signal to noise ratio. Zero Forcing (ZF) has the lowest complexity and performance. Minimum Mean Square Error (MMSE) considers the noise power to give better performance by low computation complexity. Maximum Likelihood Detection (MLD) gives the best performance by the cost of highest complexity, especially when deals with multiple streams. In the other side, other modern techniques, such as Sphere Detection and K-Best offer near performance to MLD by lower complexity. The comparison of those techniques was conducted under indoor channel model of IEEE802.11n Task Group.

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3.466 Gbps无线局域网中线性与非线性干扰消除技术的性能比较

新的WLAN标准IEEE802.11ac在调制编码方案索引9中占用80MHz的带宽和8个空间流，提供高达3.466Gbps的数据速率。然而，这些多流配置引入了密集的干扰。本文介绍了在高数据速率无线局域网中采用线性和非线性两种技术来消除干扰的方法。这些技术在性能和复杂性方面进行了比较。它们既能消除干扰，又能结合多径增益以获得最佳信噪比。零强制(ZF)具有最低的复杂性和性能。最小均方误差(MMSE)考虑噪声功率，以较低的计算复杂度提供更好的性能。最大似然检测(MLD)以最高的复杂性为代价提供最佳性能，特别是在处理多个流时。另一方面，其他现代技术，如球体检测和K-Best，通过较低的复杂性提供接近MLD的性能。在IEEE802.11n任务组的室内信道模型下，对这些技术进行了比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 International Biomedical Instrumentation and Technology Conference (IBITeC)

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