Browsing Scientific Publications in Information and Communication Technology by Subject "VDP::Mathematics and natural science: 400::Information and communication science: 420::Communication and distributed systems: 423"
Now showing items 1-20 of 25
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An adaptive cooperative MAC mechanism in multi-hop wireless networks
(Journal article; Peer reviewed, 2010)In this paper, we propose a novel adaptive cooperative MAC mechanism that is specifically designed for two-hop cooperative communications where source and destination cannot hear each other directly. The proposed scheme ... -
An exact solution for the level-crossing rate and the average duration of fades of the envelope of sum-of-cisoids processes
(Journal article; Peer reviewed, 2012)Sum-of-cisoids (SOC) processes provide a physically and numerically appealing framework for the modelling and simulation of a wide class of mobile radio channels. This paper is concerned with the problem of finding a general ... -
Analysis on channel bonding/aggregation for multi-channel cognitive radio networks
(Chapter; Peer reviewed, 2010)Channel bonding/aggregation techniques, which assemble several channels together as one channel, could be used in cognitive radio networks for the purpose of achieving better bandwidth utilization. In existing work on this ... -
Broadband internet access via multi-hop wireless mesh networks: design, protocol and experiments
(Journal article; Peer reviewed, 2010)While bandwidth for Internet access in urban areas is steadily increasing in recent years, many rural areas are still suffering from the effect of the digital divide. This paper presents a broadband Internet access paradigm ... -
Cooperative MAC design in multi-hop wireless networks-Part II: When source and destination are two-hops away from each other
(Journal article; Peer reviewed, 2010)Ubiquitous and pervasive computing and networking are envisaged as part of the future 5G wireless communication landscape where devices which are multi-hops away from each other are connected in a cooperative way. In this ... -
Cooperative MAC design in multi-hop wireless networks: Part I: When source and destination are within the transmission range of each other
(Journal article; Peer reviewed, 2010)Cooperative communication is regarded as a promising technology in future 5G wireless networks to enhance network performance by exploiting time and/or space diversity via distributed terminals. In this paper, we propose ... -
Design and Simulation of Narrowband Indoor Radio Propagation Channels under LOS and NLOS Propagation Conditions
(Chapter; Peer reviewed, 2010)This paper deals with the design and simulation of narrowband indoor propagation channels under line-of-sight (LOS) and non-LOS (NLOS) propagation conditions. We propose a reference channel model assuming that the scatterers ... -
The Design of Sum-of-Cisoids Rayleigh Fading Channel Simulators Assuming Non-Isotropic Scattering Conditions
(Journal article; Peer reviewed, 2010)n this letter, we introduce the Riemann sum method (RSM) as an effective tool for the design of sum-of-cisoids (SOC) simulators for narrowband mobile Rayleigh fading channels under non-isotropic scattering conditions. We ... -
Evaluation of international standards for ECG-recording and storage for use in tele-medical services
(Research report, 2006-05-16)This report is written to clarify which of the international standards for ECG recordings that can be used in tele-medical services, where the recordings should be transmitted by wireless telecommunication facilities and ... -
An Exact Solution for the Level-Crossing Rate of Shadow Fading Processes Modelled by Using the Sum-of-Sinusoids Principle
(Journal article; Peer reviewed, 2010)The focus of this paper is on the higher order statistics of spatial simulation models for shadowing processes. Such processes are generally assumed to follow the lognormal distribution. The proposed spatial simulation ... -
The influence of severity of fading on the statistical properties of the capacity of Nakagami-m channels with MRC and EGC
(Academic article, 2010)In this article, we have studied the statistical properties of the capacity of Nakagami-m channels when spatial diversity combining, such as maximal ratio combining (MRC) and equal gain combining (EGC), is employed at the ... -
Mobile-to-mobile fading channels in amplify-and-forward relay systems under line-of-sight conditions: statistical modeling and analysis
(Journal article; Peer reviewed, 2010)This paper deals with the modeling and analysis of narrowband mobile-to-mobile (M2M) fading channels for amplify-and-forward relay links under line-of-sight (LOS) conditions. It is assumed that a LOS component exists in ... -
A Multi-Relay Cooperative Automatic Repeat Request Protocol in Wireless Networks
(Journal article; Peer reviewed, 2010)This paper proposes a Multi-relay Cooperative Automatic Repeat ReQuest protocol (MC-ARQ) for IEEE 802.11 based wireless networks. The proposed distributed relay selection scheme not only selects the best relays but also ... -
On the correlation and ergodic properties of the squared envelope of SOC Rayleigh fading channel simulators
(Journal article; Peer reviewed, 2012)In this paper, we investigate the correlation and ergodic properties of the squared envelope of a class of autocorrelation-ergodic (AE) sum-of-cisoids (SOC) simulation models for mobile Rayleigh fading channels. Novel ... -
On the Statistical Analysis of the Channel Capacity of Double Rayleigh Channels with Equal Gain Combining in V2V Communication Systems
(Journal article; Peer reviewed, 2010)In this article, we present a detailed study on the statistical properties of the channel capacity of vehicle-to-vehicle (V2V) fading channels with equal gain combining (EGC). Assuming perfect channel state information ... -
On the Statistical Properties of Equal Gain Combining over Mobile-to-Mobile Fading Channels in Cooperative Networks
(Journal article; Peer reviewed, 2010)This article deals with the statistical analysis of equal gain combining (EGC) over mobile-to-mobile (M2M) fading channels in a dual-hop amplify-and-forward relay network. Here, we analyze narrowband M2M fading channels ... -
Performance Analysis of Alamouti Coded OFDM Systems over Rayleigh Fading Channels Correlated in Space and Time
(Chapter; Peer reviewed, 2010)This paper deals with the performance analysis of Alamouti coded orthogonal frequency division multiplexing (OFDM) systems over time-varying multipath Rayleigh fading channels. In our analysis, we consider a physically ... -
Performance Analysis of M-Ary PSK Modulation Schemes over Multiple Double Rayleigh Fading Channels with EGC in Cooperative Networks
(Peer reviewed; Chapter, 2010)This article studies the performance of M-ary phase shift keying (PSK) modulation schemes over mobile-to-mobile (M2M) fading channels with equal gain combining (EGC) in cooperative networks. The frequency-nonselective M2M ... -
Power consumption analysis for mobile stations in hybrid relay-assisted wireless networks
(Chapter; Peer reviewed, 2010)While Internet access using mobile or wireless technologies has become ubiquitous these days, the energy consumption aspect of such connections has not been studied in-depth yet. In this paper, a hybrid wireless network, ... -
Secure interworking with P2PSIP and IMS
(Academic article, 2010)In this paper, we propose a secure system model for interconnection between P2PSIP and IMS domains. The interworking solution is based on P2P-IMS GateWay (PIGW), which acts as a normal peer in P2PSIP network and a 3. party ...