In this paper, we investigate the performance of downlink multiple-input-single-output (MISO) non-orthogonal multiple access (NOMA) aided vehicular communication systems. To prepare background for MISO NOMA-based systems, first derive exact outage probability (OP), average bit error rate (ABER), and ergodic capacity (EC) expressions single-input-single-output (SISO) systems over independent but not necessarily identically distributed (i.ni.d.) double Nakagami- <italic...

Non‐orthogonal multiple access (NOMA) is an attractive candidate for future wireless networks. Recently, vehicular communications with NOMA have received substantial research attention owing to their appealing advantages. In this study, the authors investigate performance of downlink power‐domain NOMA‐enabled communications, in which a base station communicates two users UE1 (far user) and UE2 (near user). Since all nodes are moving vehicles, channels links experience independent...

This paper considers a single-input-multiple-output non-orthogonal multiple access enabled vehicular communication system, and investigates its secrecy performance over time-selective fading channel estimation errors. We formulate two scenarios considering the decoding ability at eavesdropper, viz., 1) Scenario I: when it has sufficient capability, 2) II: capability can be same as legitimate vehicles. Under such realistic system setup, we derive outage probability (SOP) ergodic capacity...

In this paper, we investigate the performance of a downlink power-domain non-orthogonal multiple access (NOMA) system, wherein base station (BS)/access point (AP) intends to communicate with two users (i.e., UE1 and UE2) simultaneously in same frequency band. Such concurrent transmission is made feasible by exploiting approach, which near user allocated less power while far relatively more power. By considering BS/AP, UE1, UE2 as moving vehicles, model vehicle-to-vehicle (V2V) channels...

In this paper, we study the joint impact of nodes' mobility and channel estimation error (CEE) on performance non-orthogonal multiple access aided vehicular communication system. Specifically, derive exact outage probability expressions for both near user far vehicles over Nakagami-m fading channels. We then analyze asymptotic behavior in high signal-to-noise ratio regime, from which valuable insights related to system's diversity order are quantified. Furthermore, some special cases...

In this paper, we investigate the ergodic sum rate (ESR) performance of a two-way relay-assisted vehicular communication system. The overall information is exchanged between source vehicle and one multiple user vehicles (chosen using best selection policy) via an amplify-and-forward relay in two-time phases. Considering double Nakagami- <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$m$</tex> fading for vehicle-to-vehicle channels, first derive...

This paper investigates the secrecy performance of a downlink non-orthogonal multiple access (NOMA) enabled vehicular communication system. In particular, we consider setup where source vehicle exploits power-domain NOMA to communicate securely with two legitimated user vehicles, i.e., far and near user. A passive eavesdropper exists in vicinity overhear confidential information both users. Based on decoding capabilities eavesdropper, formulate cases; 1) Case I: when has same capability as...

To communicate between vehicles running on highway a wireless technology should be applied which will enable the potential to avoid collision.This paper discusses method of sharing information using laser beam detection.The speed and distance is obtained BLINDER detector according commands driving decided.This system provides warning message basis data by detector.If within safety limit, alert tone activated.While crosses threshold distance, this reduce automatically.

This paper examines the secrecy performance of a downlink non-orthogonal multiple access aided vehicular communication system, where single-antenna legitimate source vehicle transmits its information to two multi-antenna user vehicles, i.e., far and near vehicle. In addition, there exists malicious in vicinity that can launch passive eavesdropping attack. To better describe links, we use first-order auto-regressive process model nodes' mobility effect estimate channel state using linear...