Distributed Interference Cancellation

Distributed interference cancellation is considered for a single source and multiple collaborative receivers in the presence of multiple unknown interferers. Receivers observe interference in a distributed setting and collaborate to mitigate the common interference from multiple unknown interferers. Under Rayleigh frequency-flat fading conditions, the ergodic capacity is shown to improve with collaboration surpassing the communication overhead due to collaboration. In particular at SINR of -15 dB, the performance improvement relative to the case without collaboration is a factor of 15. Numerical results are also provided for constrained alphabet signaling, along with simulation results based on DVB-S2/T2 standard. Finally, results from hardware-in-the-loop tests using USRPs are presented to show the feasibility of practical implementation. Both simulation and radio tests demonstrate the benefit of collaboration for distributed cancellation of unknown interference.