System Outage Probability Performance Analysis Based on Blind Interference Cancelation in Two-Way Relay Network

Additional self-interference is introduced in two-way relay network (TWRN) while spectral efficiency is increased. As for self-interference problem in amplify-and-forward (AF) modes, a kind of blind interference cancelation (BIC) scheme is employed. The scheme can realize self-interference cancellation and desired signal separation with unknown channel status information by signal precoding operating at transmitting node. In this way, the impact of residual self-interference caused by imperfect channel estimation on TWRN performance is eliminated. Based on this, the closed expression and asymptotic expression of the system outage probability (OP) under M-phase shift keying (MPSK) modulation is derived. Moreover, the influence of SOP performance with channel estimation error under different schemes is analyzed. The correctness of the theoretical derivation is verified by simulation comparison.