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首页> 外文期刊>Journal of signal processing systems for signal, image, and video technology >Software Defined Radio Implementation of a Digital Self-interference Cancellation Method for Inband Full-Duplex Radio Using Mobile Processors
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Software Defined Radio Implementation of a Digital Self-interference Cancellation Method for Inband Full-Duplex Radio Using Mobile Processors

机译：使用移动处理器的带内全双工无线电数字自干扰消除方法的软件定义无线电实现

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摘要

New means to improve spectral efficiency and flexibility in radio spectrum use are in high demand due to congestion of the available spectral resources. Systems deploying inband full-duplex transmission aim at providing higher spectral efficiency by concurrent transmission and reception at the same frequency. Potentially doubling system throughput, full-duplex communications is considered as an enabler technology for the upcoming 5G networks. However, system performance is degraded due to the strong self-interference (SI) caused by overlapping of high power transmit signal with the received signal of interest. Furthermore, due to commonly existing radio frequency imperfections, advanced techniques capable of mitigating nonlinear SI are required. This article presents a real-time software-defined implementation of a digital SI canceller for full-duplex transceivers, potentially applicable even in mobile-scale devices. Recently, software-defined radio has gained a lot of interest due to its higher flexibility, scalability, and shorter time-to-market cycles compared to traditional fixed-function hardware designs. Moreover, as the performance enhancements achieved by increasing the clock frequency is reaching its limits, the current trend is towards multi-core processors. Since contemporary mobile phones already contain powerful massively parallel GPUs and CPUs, feasibility of a real-time implementation on mobile processors is studied. The reported results show that by adopting the presented solution, it is possible to achieve sufficient SI cancellation under time varying coupling channel conditions. Additionally, the possibility of carrying out such advanced processing in a real-time fashion on the selected platforms is investigated, and the implementation is evaluated in terms of execution time, power, and energy consumption.
机译：由于可用频谱资源的拥塞，对提高频谱效率和无线电频谱使用灵活性的新方法提出了很高的要求。部署带内全双工传输的系统旨在通过在同一频率上同时进行传输和接收来提供更高的频谱效率。全双工通信有可能使系统吞吐量翻倍，被认为是即将到来的5G网络的使能技术。但是，由于高功率发射信号与感兴趣的接收信号重叠而导致的强烈的自干扰（SI），导致系统性能下降。此外，由于通常存在的射频缺陷，因此需要能够减轻非线性SI的先进技术。本文介绍了用于全双工收发器的数字SI消除器的实时软件定义实现，甚至在移动规模的设备中也可能适用。近年来，与传统的固定功能硬件设计相比，软件无线电以其更高的灵活性，可扩展性和更短的上市时间而引起了人们的极大兴趣。此外，随着通过增加时钟频率实现的性能增强达到其极限，当前的趋势是朝着多核处理器发展。由于现代手机已经包含强大的大规模并行GPU和CPU，因此研究了在移动处理器上实时实施的可行性。报告的结果表明，通过采用提出的解决方案，可以在时变耦合信道条件下实现足够的SI消除。此外，还研究了在所选平台上实时进行此类高级处理的可能性，并根据执行时间，功耗和能耗评估了实现。

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