Hybrid duplex wireless peer discovery with imperfect self-interference cancellation

This letter investigates the hybrid duplex wireless peer discovery (Hyb-WPD) that increases the average number of discovered peers (ADP), through arbitrating between half duplex and full duplex (FD) operations. FD allowing simultaneous tranceiving inherently introduces residual self-interference (RSI) due to non-ideal implementation; thus, this impairment yields a new design issue for transmission probability, which determines whether a peer receives or tranceives. This letter proposes the design principles for the Hyb-WPD depending on RSI through mathematically analyzing the ADP, and the numerical results demonstrate their performance.