Abstract:

Two-way relaying communication improves the spectrum efficiency while obtaining the space diversity gains of traditional one-way cooperative communication. Based on the decode-and-forward two-way opportunity relaying communication model with asymmetric rate requirements, the approximate closed expression of outage probability is presented, and the optimization of power allocation is proposed when channel state information is known. Simulation results verify the outage performance of decode-and-forward two-way opportunity relaying. Compared with the analog network coding, the decode-and-forward network coding has a profit of 2~3 dB in the middle signal-to-noise ratio with optimal transmit power allocation.