Interference is usually regarded as a detrimental factor that must be avoided or suppressed to achieve higher performance in traditional wireless communications. Wireless energy harvesting (EH) technologies have been found to be capable of converting such harmful interference into a feasible energy source for low-powered Internet of Things (IoT) devices that otherwise have limited lifetimes. In this context, we introduce a wireless-powered interference network (WPIN) in which interference is proactively controlled, considering the two opposing concepts of signal jammers and energy sources to improve the bidirectional transmission rate of IoT devices. First, an overview of WPIN applications is provided in various wireless topologies with complex cochannel interference. Then, a wireless interference harvesting protocol is presented to manage this cochannel interference for bidirectional communications in WPINs. We investigate coordinated resource management and beamforming schemes based on this interference harvesting protocol and demonstrate how these schemes improve the performance of WPINs. Simulation results show that the proper utilization of interference according to the channel structure decreases interference’s negative effects on information decoding and increases the amount of harvested energy, thereby simultaneously improving the downlink and uplink capacities. Finally, imminent research challenges and directions with regard to making WPINs more practical and useful are outlined.

中文翻译：

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无线供电干扰网络：应用、方法和挑战

干扰通常被视为传统无线通信中必须避免或抑制才能实现更高性能的有害因素。人们发现，无线能量收集 (EH) 技术能够将此类有害干扰转化为低功耗物联网 (IoT) 设备的可行能源，否则这些设备的使用寿命有限。在此背景下，我们引入了一种无线供电干扰网络（WPIN），其中考虑了信号干扰器和能源这两个相反的概念，主动控制干扰，以提高物联网设备的双向传输速率。首先，概述了具有复杂同信道干扰的各种无线拓扑中的 WPIN 应用。然后，提出了一种无线干扰收集协议来管理 WPIN 中双向通信的同信道干扰。我们研究了基于该干扰收集协议的协调资源管理和波束成形方案，并演示了这些方案如何提高 WPIN 的性能。仿真结果表明，根据信道结构合理利用干扰，可以减少干扰对信息解码的负面影响，增加能量收获量，从而同时提高下行和上行容量。最后，概述了使 WPIN 更加实用和有用的迫在眉睫的研究挑战和方向。