A new hybrid multicarrier transmission technique with iterative frequency domain detection
The growing progress in wireless communication services led to a demand in high data rates, spectral efficiency and flexibility requirements. The Block-Windowed Burst Orthogonal Frequency Division Multiplexing (BWB-OFDM) technique has been recently ...
Underwater acoustic communication using Doppler-resilient orthogonal signal division multiplexing in a harbor environment
Underwater acoustic (UWA) channels are one of the historical mobile ultrawideband channels characterized by large delay and Doppler spreads, but reliable UWA communication remains challenging. Here we performed an initial demonstration of the Doppler-...
Semi-cooperative game theoretic framework for resource allocation in cognitive cellular networks
Deployment of small cells beside macro cells has become the promising solution to meet the increasing service demand with limited bandwidth. However, the inter- and intra-tier interference limit the network capacity. Here, we present a semi-cooperative ...
New adaptive link layer protocol using optimal packet length for free space optical communications
In this paper, the authors propose a new link layer protocol that adapts packet length and modulation and coding scheme (MCS) to propagation conditions for free space optical communications (FSO). In conventional FSO systems, only the MCS has been ...
Effects of multiple co-channel interferers on the performance of amplify-and-forward relaying with optimum combining, multiple relays and multiple antennas
Cooperative relaying is a method used mainly to improve cellular networks in terms of diversity gain and coverage extension. However, its performance is gravely affected by the co-channel interference (CCI), especially when a high channel reuse is ...
A network steganographic approach to overlay cognitive radio systems utilizing systematic coding
Network steganography is an information hiding technique that utilizes network protocols to facilitate hidden communication. The aim is to embed secret information bits into regular network traffic (as a carrier) so that confidential data can be ...
On optimization of wireless XOR erasure codes
In this paper we study the problem of optimizing linear erasure codes over GF(2) for single-hop wireless multicasting. We first present an algorithmic optimization technique which minimizes the number of transmissions given the knowledge of packets ...
Performance analysis of energy harvesting AF relay systems over Nakagami-m fading channels with co-channel interferences
In this paper, we present performance analysis for an energy harvesting amplify-and-forward relay system with multiple co-channel interferences (CCIs) at the relay and destination, over Nakagami-m fading Channels. Specifically, exact and asymptotic ...
Hybrid cognitive Gaussian two-way relay channel
Motivated by the deployment of hybrid cooperative cognitive radio (HCCR) based relays in cellular environments, this paper proposes the hybrid cognitive Gaussian two-way relay channel (HCGTWRC) model. Recently, the combination of licensed and cognitive ...
Performance analysis of scheduled STBC using statistical CSI under multiple interferers with different power in CR-MIMO systems
This paper studies the impact of the multiple interferers with different power on performance of a scheduled spacetime block coding (STBC) using the statistical channel state information (CSI) in cognitive radio-multiple input multiple output (CR-MIMO) ...
How to manage resources to provide physical layer security
This paper studies the required physical (e.g. relays and jammers) and radio resources (e.g. power) to provide physical layer security for relay and friendly jammer assisted multiple-input and single-output transmissions in the presence of multiple ...
Outdoor large-scale path loss characterization in an urban environment at 26, 28, 36, and 38 GHz
Most of the existing channel models cannot be applied to emerging millimeter-wave (mmWave) systems due to the difference between the characteristics of existing operating frequency bands and mmWave frequency bands. Thus, extensive studies on channel ...
Space shift keying for multi-hop multi-branch networks
In this paper, we propose two different multi-hop multiple-input multiple-output (MIMO) space shift keying (SSK) schemes and investigate their error performance. In the first scheme, we consider a multi-hop multi-branch SSK system, in which the source ...
Benefits of the sparsity of mmWave outdoor spatial channels for beamforming and interference cancellation
Future outdoor communication networks are expected to make use of the mmWave bands. In this context, this paper investigates the use of sparse signal processing for efficient angular frequency estimation. Compressive sensing (CS) and correlation-based ...
Interference alignment with iterative channel estimation for the reciprocal M2 MIMO X Network
This paper investigates an interference alignment (IA) scheme for a reciprocal multi-input multi-output (MIMO) M2 X network where the knowledge of channel state information (CSI) is required. In our proposed approach, singular vectors, calculated from ...
Dynamic scheduling for wireless multicast in massive MIMO HetNet
Consider a massive multiple input and multiple output (MIMO) heterogeneous network (HetNet) scenario where the macro base station is coupled with low-power nodes (LPNs) to provide wireless multicast transmission to user equipments (UEs) within a single ...
Worst-case weighted sum-rate maximization in multicell massive MIMO downlink system for 5G communications
In this paper, we present a robust beamforming design to examine the weighted sum-rate maximization (WSRM) problem in a multicell massive MIMO downlink system for 5G communications. This work assume imperfect channel state information (CSI) by adding ...
Analysis and optimization of energy harvesting AF relaying with channel estimation
In energy harvesting relaying, channel estimation needs to be performed to acquire channel state information at the relay and at the destination. Thus, the data packet from the source to the relay contains three parts: pilot for channel estimation, data ...
Joint resource optimization for DF relaying SWIPT based cognitive sensor networks
Spectrum and energy are two important resources for wireless sensor networks (WSNs). Cognitive Radio (CR) can improve the efficiency of spectrum utilization by allowing secondary users (SUs) access to the licensed bands as long as they do not ...
Dynamic threshold-setting for RF-powered cognitive radio networks in non-Gaussian noise
The increasing demand for spectral and energy efficient communication networks has drawn an upsurge of interest in frequency (RF) energy harvesting (EH) cognitive radio networks (CRNs), and the spectrum analyzer is the brain to provide different ...
LMMSE channel estimation for wireless energy harvesting AF relaying
Wireless energy harvesting can be adopted in relaying systems to solve the energy issue at the relay node. Channel estimation is an important aspect of its system design. Thus, in this paper, we study channel estimation for wireless energy harvesting ...
A novel energy-balanced routing algorithm in energy harvesting sensor networks
In energy harvesting wireless sensor networks, despite the network lifetime can be prolonged through nodes energy collection, how to enhance energy efficiency and optimize routing protocol are still critical and challenging due to volatility and ...
Energy efficiency optimization for SWIPT in K-user MIMO interference channels
In this paper, we investigate the energy efficiency (EE) for K-user multiple-input multiple-output (MIMO) interference channels with simultaneous wireless information and power transfer (SWIPT) and interference alignment (IA). Specifically, power ...