A real-time implementation of interference neutralization for multi-source multi-hop wireless networks

Interference neutralization (IN) is a promising multi-hop cooperative transmission technique for future wireless networks, which cancels co-channel interference caused by multiple sources with the help of multiple relay nodes. This paper presents the first real-time implementation of IN using software defined-radio testbed based on MATLAB/Simulink and Universal Software Radio Peripheral (USRP) platform. The testbed is used to demonstrate the feasibility of IN and to compare its network's sum-rates with conventional multi-hop transmission strategies. Measured results show that we are able to successfully achieve over-the-air IN in real-world settings. We believe that IN technology can be well applied to consumer mobile communication devices, such as smart phones, tablets, etc, in infrastructure assisted ad-hoc or future cellular networks.