Experimental Insights on Software-Based Real-Time SI Cancellation for In-Band Full Duplex DF Relays
Experimental Insights on Software-Based Real-Time SI Cancellation for In-Band Full Duplex DF Relays
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DOI：
10.1109/icc.2019.8762085
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发表时间：
2019-05
期刊：
影响因子：
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通讯作者：
Muhammad Sohaib Amjad;F. Dressler
中科院分区：
文献类型：
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作者：
Muhammad Sohaib Amjad;F. Dressler
在过去的十年中，基础设施中继已经被诸如WiMAX和LTE的无线标准采用，以显著增强无线系统的覆盖和性能。这些中继以半双工模式运行，这不仅增加了整体延迟，而且还导致频谱损失。相比之下，带内全双工中继可以通过同时从源接收分组并将其转发到目的地来有效地科普这些问题。考虑到自干扰抑制技术的最新进展，这变得特别有趣。在这项工作中，我们提出了一个基于SDR的实时实现的全双工解码和转发中继在GNU无线电。基于开源和可编程的硬件和软件，实现是完全透明的，可以在所有细节上进行研究，并在需要时进行修改。通过大量的实验，我们验证了所提出的中继系统的实际性能，并测量可实现的吞吐量增益。我们的研究结果表明，并强调了从经典的半双工中继切换到全双工中继系统的巨大优势。
In the last decade, infrastructure relays have been adopted by wireless standards, such as WiMAX and LTE, to substantially enhance the coverage and performance of wireless systems. These relays operate in a half-duplex mode, which not only increases the overall latency but also causes spectral losses. In contrast, an in-band full-duplex relay could effectively cope with these issues by simultaneously receiving packets from source and forwarding them towards destination. This becomes particularly interesting given the recent advancement in self-interference suppression techniques. In this work, we present an SDR-based real-time implementation of a full-duplex decode and forward relay in GNU Radio. Based on open-source and programmable hardware and software, the implementation is completely transparent and can be studied in all details and modified if needed. With an extensive set of experiments, we validate the practical performance of the proposed relay system, and measure achievable throughput gains. Our results demonstrate and underline the huge advantage of switching from the classical half-duplex relaying to full-duplex relay systems.