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We study outage performance of a downlink multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) in dual hop amplify-and-forward (AF) relay communication system over frequency non-selective and slow fading channels with Nakagami-m distribution. In the network, the base station (BS) and mobile users equipped by multiantenna communicate by the help of fixed gain AF relay with single...
In this paper, we study the performance of a dualhop amplify-and-forward (AF) communication system over asymmetric links composed of Radio-Frequency (RF) and Free-Space-Optical (FSO) links in the presence of atmospheric turbulence as well as pointing error impairments under both heterodyne detection and intensity modulation with direct detection (IM/DD) techniques. The RF link is assumed to operate...
In this paper, we investigate the performance of a generic relay system for small cells. The main features include the selection decode-and-forward (DF) scheme, Rician and Rayleigh fading, single or repeated transmissions in direct link, and maximal-ratio combining at destination. We are able to derive a set of closed-form expressions for the end-to-end performance. Based on these formulas, we define...
Considering unreliable wireless backhaul connections across transmitters, we investigate the outage performance of a finite-sized selective relaying system with M transmitters and N relays under Nakagami-m fading channels. To send the source message to the destination, the transmitter-relay pair providing the highest end-to-end signal-to-noise ratio is selected for transmission. The backhaul reliability...
In this paper, we model a dual-hop hybrid visible light communication-radio frequency (VLC-RF) system which provides a good solution to communicate laboratory test results from the laboratories to patients in no time. In this system, the data is transmitted from laboratory via an RF uplink to an amplify and forward relay node which further forwards it to the patient in the form of light using VLC...
In order to achieve more efficient communication performances in vehicular ad hoc network (VANET) for road safety related message propagation, we propose a special nonbinary network coding scheme to improve the system reliability by reducing the outage probability of the communication system. Suppose all users in the network are provided with multiple antennas, which are responsible for message transmitting,...
In this paper, the performance of radio frequency energy harvesting system with multiple power-constrained relays over Rician/Rayleigh fading channels is studied. This considered system consists of one power and information source, multiple power-constrained relays and one destination. In order to exploit the diversity advantage of cooperative network with low computational complexity, the relays...
This paper investigates the performance of the best relay selection, based on the max-min signal-to-noise ratio criterion for dual-hop free-space optical (FSO) full-duplex (FD) relays communication system. Decode-and-forward relays over log-normal (LN) channels for weak-to-moderate turbulence and gamma-gamma (G-G) channels for strong turbulence are considered. We assume that the relays have full channel...
In this paper, we investigate the performance of cooperative amplify-and-forward (AF) multi-relay networks with relay selection strategy over independent and identically distributed (i.i.d.) Nakagami-m fading channels. In this system we study multiuser cooperative relaying to have a secure transmission from source to destination, since transmitted information may be wiretapped by multiple eavesdroppers...
In this work, we carry out a exact performance analysis of dual-hop cooperative amplify-and-forward relaying systems in wireless body area networks over independent and nonidentically distributed Gamma fading channels. In particular, we derive new exact closed-form expressions for the end-to-end outage and symbol error probabilities at arbitrary signal-to-noise-ratios (SNRs) of these systems in terms...
The Gamma-Gamma distribution has recently emerged in a number of applications ranging from modeling scattering and reverbation in sonar and radar systems to modeling atmospheric turbulence in wireless optical channels. In this respect, assessing the outage probability achieved by some diversity techniques over this kind of channels is of major practical importance. In many circumstances, this is intimately...
In this work, we present the outage analysis for a variable gain amplify-and-forward relayed dual-hop link that comprises of a radio frequency (RF) first-hop link and a free space optical (FSO) link for the second-hop. We assume that no direct RF and FSO link exists between the source and destination nodes. The RF link experiences a composite multi-path fading and shadowing effects, and is modeled...
In this work, we carry out a exact performance analysis of dual-hop cooperative amplify-and-forward relaying systems in wireless body area networks over independent and non-identically distributed Gamma fading channels. In particular, we derive new exact closed-form expressions for the end-to-end outage and symbol error probabilities at arbitrary signal-to-noise-ratios (SNRs) of these systems in terms...
We investigate the performance of dual-hop fixed gain amplify-and-forward (AF) relaying systems over Nakagami-m and double generalized Gamma (DGG) fading channels for mixed radio frequency/free space optical (RF/FSO) wireless systems. The FSO links account for pointing errors and two types of detection techniques. Our adopted turbulence and fading statistical models are the most general ones. To mitigate...
In this paper, we consider an incremental cooperative relaying network (IR-CRN), where a relay node harvests the radio energy from the source signal using the time-switching mechanism. Specif cally, we propose a scheme named as IR-CRN which enhances spatial diversity gain by utilizing the incremental relaying protocol. The destination node of the IR-CRN scheme employs maximal ratio combining (MRC)...
In wireless networks, interference modeling is essential for performance analysis and protocol design, since it is the most important cause of performance degradation. The interferers are usually assumed to be random and their locations modeled by a homogeneous Poisson point process (PPP). Performance analysis in wireless networks with Poisson field of interferers is mainly based on the characteristic...
This paper gives the performance study of a cascaded diamond network. A route that provides the maximum of minimum value of available SNRs of all paths is elected. At first, the cumulative distribution function (CDF) of the overall SNR of the considered system is found. By using the derived CDF, the outage probability, coding and diversity gain of the considered system are derived. Later, ergodic...
In this paper, a unified performance analysis of a dual-hop semi-blind amplify and forward relay over underwater wireless communication system is presented. Both RF links (Source-Relay (S-R) and Relay-Destination (R-D)), are modeled by independent and not necessarily identically distributed k shadowed fading channel. We derive an approximative closed form analytical expression for the cumulative distribution...
This paper proposes an Improved Quality-Based Channel State Feedback (IQCF) scheme in multicast systems with greedy scheduling for multiple multicast groups. The proposed scheme outperforms the Quality-Based Channel State Feedback (QCF) scheme in the literature by selecting a scheduling outage group for data transmission when scheduling outage happens. We also analyze its performance in terms of average...
This paper analyzes the outage probability, energy efficiency, energy efficiency-spectral efficiency trade-off, through-put performance, energy efficiency-throughput gain trade-off and derives the optimal transmission power of Single-hop, Multi-hop, Decode-and-Forward (DF) and Incremental Decode-and-Forward (IDF) schemes in order to find out what extent collaborative communication can save energy...
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