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The interference attack or better known as jamming attacks are very easy to implement affecting the service of any wireless communication system given the vulnerability of data sent to the user. This attack by denying the normal operation of the service detracts from the purpose of these systems. In general, a jamming attack is difficult to detect given the little experimental data provided by the...
Ambient backscatter is a new technology that utilizes environmental wireless signals to enable battery-free devices to communicate with each other. In this paper, we investigate the problem of signal detection for the full duplex wireless system utilizing ambient backscatter. Since one of the key technologies of full duplex wireless system is self-interference cancellation, we first estimate the channel...
The High Performance Waveform (HPW) was developed before parallel concatenated codes (PCCC) and serial concatenated codes (SCCC) were in wide use and so it makes sense to take advantage of the advancements in communication theory and processor computation speed that have taken place since its inception. In its current form, HPW transmits a Raised-Cosine Continuous Phase Modulation (1RC CPM) modulation...
In recent years, a new communication technology emerged by taking advantage of the high-speed switching capabilities of LED known as VLC (Visible Light Communication) has been getting more attention. On the other hand, OFDM is one of the technology that can efficiently utilize a frequency band. In this paper, our goal is to develop a VLC OFDM system, that is easily operable, and capable of high speed...
Due to the volatile network topology and time-varying channel conditions, high-efficient data transmission in Vehicular Ad-hoc Networks (VANETs), especially for error-prone channels, is a challenging task. In the paper, we investigate traffic scheduling based on the Remaining Delay (RD) and propose an adaptive frame length aggregation stategy with the RD limit in VANETs. In our scheme, we classify...
In optical wireless communication systems, the underwater visible light communication (UVLC) systems is becoming more and more popular. However, due to intrinsic properties of water body, the propagating optical channel can suffer from severe degrading effects, namely absorption, scattering, and turbulence. Here, we aim to improve the UVLC system performance. For this, we propose to utilize an adaptive...
Medical Body Area Network (MBAN), recently released by the Federal Communications Commission (FCC), is a narrowband body area network (NB-BAN) specialized for medical applications. Its allocated band of frequency is from 2360–2400 MHz. This paper studies the effect of transmitter and receiver node positions on the bit-error-rate (BER) performance and maximum allowable data throughput of the on-body...
The exponentially increasing number of IoT devices makes the unlicensed industrial, scientific, and medical (ISM) radio bands (e.g., 2.4 GHz) extremely crowded. Currently, there is no efficient solution to coordinate the large amount heterogeneous IoT devices that have different communication technologies (e.g., WiFi and ZigBee). To fill this gap, in this paper, we introduce embedded multiple flows...
There are many research on hybrid selective-repeat ARQ method. In many previous research purposes have been to maximize a throughput on the number of messages delivered to the user. Important theoretical limits were studied under the condition that a decoding error was very small and neglected. In this research we propose the optimal type-I hybrid selective-repeat ARQ with finite receiver buffer....
This paper describes the end-to-end performance of single mode Fiber Optic Network (FON), implemented for Unmanned Surveillance System (USS) application for the detection and tracking of land and sea based moving targets. Optical fibers are widely in fiber optic communications which permits transmission over longer distances and at higher bandwidths (data rates) than other forms of communication....
This paper proposes a novel priority-aware packet fragmentation extension to high throughput WLANs such as IEEE 802.11n for streaming of H264/AVC encoded videos. Unlike existing fragmentation schemes, the proposed scheme fragments IP packets based on the priority of video packets and the characteristics of MPEG-2 TS, where the original IP packet is fragmented into smaller IP packets containing fewer...
The fragmentation and aggregation (F&A) algorithm improves the throughput while ensuring the reliability in the MAC layer. To determining the optimal fragment size is a key issue of effectively operating the F&A algorithm. In this paper, the proposed method selects the optimal fragmented frame size and uses aggregation scheme based on various channel conditions. As a result the throughput...
The error performance of fixed access and home (FA&H) technologies is an important physical layer (PHY) characteristic that has strong impact on the end-user's experience. However, different FA&H technologies employ different approaches to define their error performance, making it difficult to compare or align technologies. In this paper, we present the, to our knowledge, first unified comparison...
In this paper, we propose a selective physical layer network coding (SPNC) scheme in two-way relay channel (TWRC) for binary phase shift keying (BPSK) modulation over Rayleigh fading channels. Physical layer network coding (PNC) shows average throughput gain over traditional relaying in two-way relay systems, but not in all channel conditions PNC performs better than traditional relaying. The key...
This paper presents a new dynamic and fully generic implementation of a Successive Cancellation (SC) decoder (multi-precision support and intra-/inter-frame strategy support). This fully generic SC decoder is used to perform comparisons of the different configurations in terms of throughput, latency and energy consumption. A special emphasis is given on the energy consumption on low power embedded...
In this paper, we consider the multicast resource allocation problem for video streaming in Orthogonal Frequency Division Multiple Access (OFDMA) systems. The video streams are encoded into base layer (BL) and enhancement layer (EL) data by the hierarchical video coding (HVC) scheme. The basic resource unit is a set of contiguous subcarriers (chunk). The problem is formulated to maximize the sum of...
In this paper, we consider a time-division multiple-access relay channel (MARC), in which two source nodes (SNs) transmit data with different data rate to a destination node (DN) with the help of a relay node (RN). To provide asymmetric data rates, we consider joint hierarchical 16QAM (HM 16QAM) and network coding. Simulations results show that the joint HM 16QAM and network coding has similar throughput...
In this paper, we propose a new IP transmission architecture over optical fast frequency hopping code-division multiple-access (OFFH-CDMA) network capable of supporting multirate transmissions for applications in flexible optical access networks. The proposed network architecture is independent of the spreading code employed and does not require any new optical processing technology. The performance...
The demand for high data rate communication is continuously increasing. To address this, studies on bit error rate improvements, cooperative diversity and transmit diversity have been topics of interest. In this paper, a novel Quad State- Paired QPSK (QS-PQPSK) modulation scheme is proposed. The proposed technique is simulated and compared with other main PSK-based modulation schemes. Preliminary...
A broad range of emerging applications require very low power, very long range yet low throughput communication. Different standards are being proposed to meet these novel requirements. In this paper, the technical differences between a wideband spread spectrum (LoRa-like) and an ultra narrowband (Sigfox-like) network will be explained and evaluated. On the physical layer, simulation results show...
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