Nov 20

The IUP Journal of Telecommunications

Focus

New generation network planning usually involves heterogeneous interfacing protocols, efficient wireless backhauling to realize self-organizing networks with context awareness and dynamic link catching to support user-oriented wireless services. Such network infrastructure adopts novel transmission technologies to enhance spectrum efficiency by the successful implementation of Cognitive Radios (CRs), OFDM, multi-carrier transmission and other efficient modulation schemes. Modern HSPA and LTE technologies successfully exploit the potential of advanced multi-antenna transmission-reception schemes, improved network components and new operating spectrum extendable to lightwave frequency. High data rate services of mobile networks require higher power efficiency of the involved hardware along with efficient network management algorithms for various service provisioning applications.

This issue contains four research papers covering wireless channel modeling, energy minimization, interference mitigation and optical channel applications in wireless telecommunication. The first two papers discuss the BER computation and energy minimization in the wireless system and the third one elaborates on the interference mitigation techniques in anti-jammer design. The last paper reports the design of a photonic crystal fiber and its application in optical wave transmission.

The first paper, "BER Computation of OFDM System Using Real Audio Signal for Rician Channel", by Pratima Manhas, M K Soni and Shaveta Thakral, proposes an OFDM system modeling based on audio signal input applicable to Rician wireless channel. The paper computes the channel performance in terms of BER under different SNR levels using MATLAB simulink models.

Wireless Senser Networks (WSN) and its interfacing with IoT-based networks require energy-efficient hardware circuitry and software control algorithms. The second paper, "A Comparative Analysis of GWO and ABC Algorithm for Energy Consumption Minimization in Wireless Sensor Network", by Gyanender Kumar and Lincoln Hadda, proposes the Gray Wolf Optimizer (GWO) technique in bunching and grouping of WSN for improved power consumption. The paper utilizes fuzzy rationale controller-based methodology for bunch head picking and reports a preferable outcome over the conventional-tuned boundary methods.

The third paper, "Space-Time Adaptive Processing (STAP) Techniques for Mitigation of Jammer Interference and Clutter Suppression in Airborne Radar Systems: A MATLAB Implementation-Based Study", by Chaitanya Vijaykumar Mahamuni, applies the STAP technique to nullify the jammer signal and to recognize the slow-moving targets. The paper implements the STAP algorithm in MATLAB to suppress the clutter and jammer interference.

At present, in long haul communication, often the wireless traffic has to travel through optical carriers either in a wireless environment or in a guided mode through an optical fiber. Obviously, such guided lightwave communication systems need low loss and low dispersion medium for signal propagation for high data rate transmission. However, for optical signal processing in modern soliton communication system, high non-linearity with low dispersion medium is required for stable pulse propagation. The last paper, "Design and Analysis of Highly Nonlinear and Low Dispersion AlGaAs-Based Photonic Crystal Fiber", by Gyanender Kumar and Sachin Kumar Yadav, presents an AlGaAs-based standard photonic crystal fiber structure for low dispersive nonlinear optics applications. The paper employs a finite element solver method to characterize the dispersive and nonlinear behavior of the proposed PCF.

-V K Chaubey,
Consulting Editor

Article   Price (₹)
BER Computation of OFDM System Using Real Audio Signal for Rician Channel
100
A Comparative Analysis of GWO and ABC Algorithm for Energy Consumption Minimization in Wireless Sensor Network
100
Space-Time Adaptive Processing (STAP) Techniques for Mitigation of Jammer Interference and Clutter Suppression in Airborne Radar Systems: A MATLAB Implementation-Based Study
100
Design and Analysis of Highly Nonlinear and Low Dispersion AlGaAs-Based Photonic Crystal Fiber
100
Contents : Nov 20

BER Computation of OFDM System Using Real Audio Signal for Rician Channel
Pratima Manhas, M K Soni and Shaveta Thakral

Higher generation of mobile communication system requires a very high bandwidth and it can be possible using efficient modulation technique known as Orthogonal Frequency Division Multiplexing (OFDM). It has various applications in the field of wireless and wired application. Modeling of OFDM system has been done using real data audio signal as an input for different fading channels. In this paper, modeling of OFDM technique is done using Rician fading channel. Bit Error Rate (BER) is computed for OFDM system using different values of SNR. The modeling of OFDM is done using MATLAB 8.1 simulink tool.


© 2020 IUP. All Rights Reserved.

Article Price : ₹ 100

A Comparative Analysis of GWO and ABC Algorithm for Energy Consumption Minimization in Wireless Sensor Network
Gyanender Kumar and Lincoln Hadda

The fame of Wireless Sensor Networks (WSN) has expanded quickly and colossally because of the huge capability of the sensor systems to associate the physical world with the virtual world. Since sensor gadgets depend on battery force and hub vitality and might be set in antagonistic situations, supplanting them turns into a troublesome undertaking. In this way, improving the vitality of these systems, for example, becomes significant. The proposition gives techniques to bunching and group head determination to WSN to improve vitality effectiveness utilizing a fluffy rationale controller. It presents a correlation between the various techniques based on the system lifetime. It contrasts existing ABC streamlining technique and the Gray Wolf Optimizer (GWO) enhancement calculation for various sizes of systems and diverse situations. It furnishes bunch head determination technique with great execution and diminished computational multifaceted nature. The paper proposes GWO as a calculation for grouping of WSN which would bring about improved execution with quicker combination.


© 2020 IUP. All Rights Reserved.

Article Price : ₹ 100

Space-Time Adaptive Processing (STAP) Techniques for Mitigation of Jammer Interference and Clutter Suppression in Airborne Radar Systems: A MATLAB Implementation-Based Study
Chaitanya Vijaykumar Mahamuni

Radar systems are used for detection of objects by transmitting the electromagnetic waves in the free space. They operate in environments where there is a high possibility that the desired echo signal interferes with the signals from other sources. These signals include clutters and jammer signals. The jammer is a device that continuously emits the wideband radio signals in the radar environment to saturate the receiver with noise or false information. Thus, the total received signal has three components-returns from target, clutter and jammer combined, i.e., it is a three-dimensional signal. The use of conventional signal processing techniques is not desirable, as they cannot separate the desired echo signal from the other components, because the statistics of these components in the received signal is not known. This problem needs to be accounted for in airborne surveillance radars, as they have to identify and locate the targets in multiple interference environments. The Space-Time Adaptive Processing (STAP) Techniques is a combination of spatial and temporal filtering that can nullify the jammer signal and recognize the slow-moving targets. These techniques filter the signal in the angular and the Doppler domain for suppressing the unwanted signals. The paper presents a theoretical study of space-time adaptive coding techniques and MATLAB implementation of STAP algorithms, namely, SMI, DPCA and ADPCA, to suppress clutter and jammer interference in the received pulse.


© 2020 IUP. All Rights Reserved.

Article Price : ₹ 100

Design and Analysis of Highly Nonlinear and Low Dispersion AlGaAs-Based Photonic Crystal Fiber
Gyanender Kumar and Sachin Kumar Yadav

The paper studies an AlGaAs-based standard photonic crystal fiber structure for low dispersive nonlinear optics applications. By employing a finite element solver with perfectly matched layer boundary condition, the key propagation characteristics are investigated over a broad wavelength span of 1 mm to 5 mm by taking different air filling fraction values. The proposed work provides an effective fundamental mode area of 7.30 mm2 with nonlinearity in the order of 8.325W-1m-1 at a low absorption wavelength of 1.55 mm and zero-dispersion wavelength close to 3 mm.


© 2020 IUP. All Rights Reserved.

Article Price : ₹ 100