Abstract
Vehicular networks are regarded as an effective solution for the traffic management and road safety. In this paper, the performance of the vehicular networks is investigated under Nakagami-m fading channels. The vehicular communication is considered to reuse the same time-frequency with another vehicular communication link, so that both interference and noise produce an effect on each vehicle and infrastructure. Firstly, we derive the closed-form expressions for the outage probability of vehicular links and particularly examine two special cases, that is, high SNR case and weak interference case. For both cases, approximate expressions for outage probability are provided in closed form. Then, we derive lower and upper bounds of ergoidic achievable rate, which are evident to be sufficiently tight to the Monte-Carlo simulated results. Based on these results, we further analyze the high SNR and weak interference scenarios and the asymptotic expressions of ergoidic achievable rate are also presented. All the analytical results are applicable for arbitrary locations, transmit power, as well as channel parameters. Finally, we propose the power optimization which aims at maximizing the ergodic achievable rate and guaranteeing the outage performance. Numerical results validate our analytical results via Monte Carlo simulations.
Highlights
In recent years,with the seamless increase of vehicles, come along a series of critical global problems including heavy traffic, traffic accidents, as well as air pollution caused by traffic congestion [1]
The performance of NOMA SWIPT amplify-and-forward networks under Weibull fading channels was analyzed in [26] where the lower bound for the outage probability, as well as the throughput were provided with closed form
We present the tight bounds for the ergodic achievable rate with closed-form expressions
Summary
In recent years,with the seamless increase of vehicles, come along a series of critical global problems including heavy traffic, traffic accidents, as well as air pollution caused by traffic congestion [1]. The closed-form expressions for the performance of vehicular Ad-hoc networks were derived with line of sight (LOS) and single Rayleigh fading channel respectively [20]. Authors considered the AF-assisted vehicular networks over Nakagami-m fading channels and provided the lower bounds of outage performance [25]. The performance of NOMA SWIPT amplify-and-forward networks under Weibull fading channels was analyzed in [26] where the lower bound for the outage probability, as well as the throughput were provided with closed form. We provide the closed form expressions for outage probability of each link where the interference and noise are both considered at each node.
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