International Journal of Communication Systems

Cover image for Vol. 30 Issue 3

Edited By: Professor Mohammad S. Obaidat

Impact Factor: 1.099

ISI Journal Citation Reports © Ranking: 2015: 42/82 (Telecommunications); 145/257 (Engineering Electrical & Electronic)

Online ISSN: 1099-1131

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The International Journal of Communication Systems

The International Journal of Communication Systems provides a forum for R&D, open to researchers from all types of institutions and organisations worldwide, aimed at the increasingly important area of communication technology. The Journal's emphasis is particularly on the issues impacting behaviour at the system, service and management levels. Published twelve times a year, it provides coverage of advances that have a significant potential to impact the immense technical and commercial opportunities in the communications sector.

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Recently Published Articles

  1. A mixed satellite TV channel transmission scheme to enhance frequency bandwidth utilization

    Junyu Lai, Jie Zhao, Wei Zhang, Ci He and Yasheng Zhang

    Version of Record online: 20 JAN 2017 | DOI: 10.1002/dac.3266

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    By using both broadcast and multicast methods, both Ku and Ka frequency bands, as well as both wide-shaped and spot antenna beam types, the proposed mixed satellite TV channel transmission scheme can effectively enhance the frequency bandwidth utilization with still providing TV users an affordable quality of experience.

  2. Detection and measurement of radio frequency feedback for an on-frequency repeater

    Amar Zeher, Jean-Marie Bilbault and Stéphane Binczak

    Version of Record online: 20 JAN 2017 | DOI: 10.1002/dac.3269

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    Radio frequency feedback (RFF) occurs when the insulation is insufficient between the antennas of an on-frequency repeater, increasing digital transmission errors. In addition, a strong RFF could compromise system stability of the on-frequency repeater because of the growing power in the closed loop. Automatic gain control is widely used by the on-frequency repeater to regulate the power, this solution being generally used with echo cancellation processes. Most of echo cancellation techniques are based on digital processing such as adaptive filters whose effectiveness and algorithms‘ speed depend on the signal frequency, bandwidth, and closed-loop parameters. This paper describes a solution of RFF estimation and detection regardless the receiving signal modulation. By using the frequency scanning and the analysis of the power spectral density peaks in the system, this solution is reliable whatever the values of the gain margin and the loop delay are. Simulations and experimental implementation using field-programmable gate array validate the solution. In addition, an example of applications is given in the context of the interference cancellation.

  3. On efficient downlink channel aggregation in adaptive wireless push systems

    Petros Nicopolitidis

    Version of Record online: 20 JAN 2017 | DOI: 10.1002/dac.3262

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    With the advent of the latest generation of cellular networks, for example, with the possibility of adaptive allocation of downlink subcarriers in LTE, the number of possible downlink channels has increased dramatically. This letter proposed an efficient method for performing aggregation of downlink channels in data broadcasting environments. Simulation results reveal significant performance gains for the proposed bandwidth allocation method.

  4. Authorship verification using deep belief network systems

    Marcelo Luiz Brocardo, Issa Traore, Isaac Woungang and Mohammad S. Obaidat

    Version of Record online: 18 JAN 2017 | DOI: 10.1002/dac.3259

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    In this paper, a novel framework for carrying continuous authentication using stylometric analysis is proposed and compared against support vector machine as a classifier. The impact of the n-gram model, feature merging process, and feature selection method is also studied (see above Figure 2).

  5. Identifying critical challenges in the adoption of cloud-based services

    Shiromani Balmukund Rahi, Sandip Bisui and Subhas Chandra Misra

    Version of Record online: 18 JAN 2017 | DOI: 10.1002/dac.3261

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    Twelve critical challenges have been identified that need to be overcome for adopting the cloud services for any semiconductor industry.

    These are network/Internet availability, data security, integration of various services, monitoring of data and services, maintenance of computing performance, liability, power outage, service interruption, organizational change, business complexity, legal issues, and lack of awareness.

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