Outage probability analysis of vehicular communication system with two-way AF cooperation

Abstract

In vehicular communication system, two-way cooperative communication can improve system performance. However, vehicle mobile communication will cause the two-way link correlation and thus reduce the system outage performance. To solve the problem, a vehicular communication system model of two-way link correlation is presented, where the correlation coefficient is used to describe two-way link correlation and the system outage performance analysis is also simplified. Furthermore, a closed-form expression for the outage probability with AF cooperation mode is derived, and the optimal power allocation under the certain outage probability is gotten. Numerical results show that the correlation coefficient has more influences on outage performance than that of the power allocation coefficient. Moreover, compared with the optimal power allocation in one-way AF relay system, the total power with the correlation coefficient power allocation can be reduced about 4 dB.

Keywords

• two-way relay cooperation
• double-Rayleigh fading
• outage performance
• optimal power allocation