论文标题
I型HARQ辅助V2V通信的中断性能分析
Outage Performance Analysis of Type-I HARQ Aided V2V Communications
论文作者
论文摘要
密集的城市环境下的车辆到车辆（V2V）通信通常会产生严重的钥匙孔褪色效果，尤其是对于多输入多输出（MIMO）渠道，由于排名不足而导致的容量和中断性能降低了。为了避免这种情况，提出了MIMO和I型混合自动重复请求（HARQ）的整合，以协助本文中的V2V通信。通过使用Meijer G功能，提出的V2V通信系统的中断概率以封闭形式得出。结果，通过进行渐近中断分析来获得有意义的见解。具体而言，可以揭示可以实现全日制多样性顺序，而与I型HARQ辅助MIMO系统相比，完全的空间多样性顺序是无法实现的。此外，我们证明渐近中断概率是传输速率的单调增加和凸功能。最后，通过广泛的数值实验验证了分析结果。
Vehicle-to-vehicle (V2V) communications under dense urban environments usually experience severe keyhole fading effect, especially for multi-input multi-output (MIMO) channels, which degrades the capacity and outage performance due to the rank deficiency. To avoid these, the integration of MIMO and Type-I hybrid automatic repeat request (HARQ) is proposed to assist V2V communications in this paper. By using the Meijer G-function, the outage probability of the proposed V2V communications system is derived in closed form. With the result, meaningful insights are gained by conducting the asymptotic outage analysis. Specifically, it is revealed that full-time diversity order can be achieved, while full spatial diversity order is unreachable as compared to Type-I HARQ aided MIMO systems without keyhole effect. Moreover, we prove that the asymptotic outage probability is a monotonically increasing and convex function of the transmission rate. Finally, the analytical results are validated through extensive numerical experiments.
