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Open-access full-duplex wireless in the ORBIT and COSMOS testbeds
Computer Networks ( IF 5.6 ) Pub Date : 2021-08-28 , DOI: 10.1016/j.comnet.2021.108420
Manav Kohli 1 , Tingjun Chen 1 , Mahmood Baraani Dastjerdi 1 , Jackson Welles 1 , Ivan Seskar 2 , Harish Krishnaswamy 1 , Gil Zussman 1
Affiliation  

In order to support experimentation with full-duplex (FD) wireless, we integrated two generations of FD radios in the open-access ORBIT and COSMOS testbeds. In the indoors ORBIT testbed, we integrated a customized 1st generation (Gen-1) narrowband FD radio. In the city-scale PAWR COSMOS testbed, we integrated four 2nd generation (Gen-2) wideband FD radios, alongside static and mobile Gen-1 FD radios.

Each integrated FD radio consists of an antenna, a customized RF self-interference (SI) canceller box, a USRP software-defined radio (SDR), and a remotely accessible compute node. The Gen-1/Gen-2 RF SI canceller box includes an RF canceller printed circuit board (PCB) which emulates a customized integrated circuit (IC) RF canceller implementation. The amplitude- and phase-based Gen-1 narrowband RF canceller achieves 45dB RF SIC across 5MHz. The Gen-2 wideband canceller is based on the technique of frequency-domain equalization (FDE) and achieves 50dB RF SI cancellation (SIC) across 20MHz. In this paper, we present the design of the two generations of FD radios, and their integration in various forms in the ORBIT and COSMOS testbeds. We then present example experiments that can be remotely run and modified by experimenters. Finally, we discuss future improvements and potential FD wireless experiments that can be supported by these open-access FD radios integrated in the COSMOS testbed.1



中文翻译:

ORBIT 和 COSMOS 测试台中的开放接入全双工无线

为了支持全双工 (FD) 无线实验,我们在开放接入 ORBIT 和 COSMOS 测试平台中集成了两代 FD 无线电。在室内 ORBIT 测试台中,我们集成了定制的第一代 (Gen-1) 窄带 FD 无线电。在城市规模的 PAWR COSMOS 测试平台中,我们集成了四个第二代 (Gen-2) 宽带 FD 无线电以及静态和移动 Gen-1 FD 无线电。

每个集成的 FD 无线电包括一个天线、一个定制的射频自干扰 (SI) 消除器盒、一个 USRP 软件定义无线电 (SDR) 和一个可远程访问的计算节点。Gen-1/Gen-2 RF SI 消除器盒包括一个 RF 消除器印刷电路板 (PCB),它模拟定制的集成电路 (IC) RF 消除器实现。基于幅度和相位的 Gen-1 窄带射频消除器实现了 45D b 射频 SIC 跨 5兆赫. Gen-2 宽带消除器基于频域均衡 (FDE) 技术并实现 50D b 射频 SI 消除 (SIC) 20兆赫. 在本文中,我们介绍了两代 FD 无线电的设计,以及它们在 ORBIT 和 COSMOS 测试平台中以各种形式的集成。然后,我们展示了可以由实验者远程运行和修改的示例实验。最后,我们讨论了这些集成在 COSMOS 测试平台中的开放接入 FD 无线电可以支持的未来改进和潜在的 FD 无线实验。1

更新日期:2021-08-29
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