A paper on the open-access full-duplex radios in COSMOS Sandbox 2 was published in Elsevier Computer Networks

A paper about the open-access full-duplex (FD) wireless testbed in COSMOS Sandbox 2 has been published in a special issue of Elsevier Computer Networks. This paper outlines the integration of the 2nd Generation (Gen-2) Wideband FD radios into the COSMOS testbed, along with three example experiments demonstrating the capabilities of the Gen-2 FD radios and achievable gains when operating in FD mode.

The three example experiments are the following: (i) demonstration of node-level self-interference cancellation (SIC), demonstrating over 80dB of cancellation achieved in the RF and digital domains across at up to 20 MHz bandwidth, (ii) measurements of packet reception ratio between a pair of FD radios using WiFi-compliant packets with different modulation and coding schemes, demonstrating FD rate throughput up to 2x, and (iii) a random-access ALOHA-based network operating in half-duplex (HD) and FD mode showing FD rate throughput up to 1.5x. These experiments provide a baseline for experimenters to develop further experiments to be run on the Gen-2 FD radios available in Sandbox 2.

Sandbox figure
(a) The architecture of COSMOS Sandbox 2, showing the different FD radios available to experimenters. (b) A Gen-2 FD radio that has been integrated with a USRP N210 software-defined radio (SDR) in COSMOS Sandbox 2.

A tutorial on how to use the open-access FD testbed can be found here. For more details about the open-access FD testbed in COSMOS Sandbox 2, please refer to the following paper:

  1. M. Kohli, T. Chen, M. Baraani Dastjerdi, J. Welles, I. Seskar, H. Krishnaswamy, and G. Zussman, “Open-access full-duplex wireless in the ORBIT and COSMOS testbeds,” Computer Networks, no. 199, p. 108420, Nov. 2021. [download]