i-manager's Journal on Communication Engineering and Systems (JCS)


Volume 7 Issue 2 February - April 2018

Research Paper

Cognitive Radio Simulator for Mobile Networks: Design and Implementation

Pablo Palacios* , Alberto Castro **
*-** Department of Electrical Engineering, Universidad de Chile, Santiago, Chile.
Palacios, P., and Castro, A. (2018). Cognitive Radio Simulator for Mobile Networks: Design and Implementation. i-manager’s Journal on Communication Engineering and Systems, 7(2), 1-9. https://doi.org/10.26634/JCS.7.2.14441

Abstract

In this work methods and mathematical algorithms applied to the Cognitive Radio (CR) technology are tested through the  development  of a  CR  simulator applied  to WiFi  and  Long Term  Evolution  (LTE) mobile wireless networks,  structured with each of the four stages of a system CR, using mathematical tools evaluated  in  previous  works  individually.   The implementation of the CR simulator jointly adapts to different algorithms, which are: Singular Value Decomposition (SVD), Coalition Game Theory and Handoff of technologies by Received Signal Strength Indicator (RSSI). The Network Simulator 3 software (NS-3) is used as an environment for the development and execution of a heterogeneous cognitive network based on the created simulator. Results  are obtained,  numerical  data  shown  in  files  for  the SVD methods,  coalition  game and RSSI, these allow to evaluate their  performance comparing them with other theoretical CR algorithms. Validations and comparisons of the detection stage are shown for functional verification of the simulator.

Research Paper

Design of An Improved Ultra-Wideband Bandpass Filter Using Defected Ground Structure

Dubey Suhmita Umeshkumar* , S. Sivanagaraju**
*M.Tech Scholar, Department of Electronics and Communication Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh, India
** Assistant Professor, Department of Electronics and Communication Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh, India.
Umeshkumar, D., and Kumar, M. (2018). Design of an Improved Ultra-Wideband Bandpass Filter Using Defected Ground Structure. i-manager’s Journal on Communication Engineering and Systems, 7(2), 10-14. https://doi.org/10.26634/jcs.7.2.14438

Abstract

The paper depicts the filter design for millimeter wave range using defected ground structure (DGS) technique. DGS is mainly used for reduction in size of filter design resulting in compactness of model with enhanced efficiency to cope with the latest technological demands. Designs with DGS provides improvements in the optical and millimeter devices. The simulations are carried using HFSS V13. The design is carried out on RT/ Duroid 6002 with loss tangent (tan δ) 0.0012 with outcomes as return loss of more than 27dB and insertion loss near to 1dB. It also provides better selectivity to avoid spurious signals and higher fractional bandwidth. The proposed design is used for the application of automobiles, sensors, communication etc.

Research Paper

An Octagonal Shaped Microstrip Patch Antenna with Quadruple Band Notched Characteristics for UWB Applications

KM Jyoti Singh* , Rajan Mishra**
* PG Scholar, Department of Electronics and Communication Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, India.
** Assistant Professor, Department of Electronics and Communication Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, India.
Singh, J., and Mishra, R. (2018). An Octagonal Shaped Microstrip Patch Antenna With Quadruple Band Notched Characteristics for UWB Applications. i-manager’s Journal on Communication Engineering and Systems, 7(2), 15-19. https://doi.org/10.26634/jcs.7.2.14439

Abstract

In this proposed paper, an octagonal shaped microstrip patch antenna with frequency band stop performance is designed for UWB applications. The scheduled antenna consists of one L slot and one I slot onto the radiation patch and ground plane is modified by cutting two rectangular slots into it. By etching the slots from the radiation patch and from ground plane, quadruple band notched properties in the WLAN band (5.2-5.8 GHz), WiMAX band (3.5-5.5 GHz), National Information Infrastructure (U-NII) (5.15 to 5.825 GHz) and C band (4 GHz) are obtained. The scheduled antenna has a suitable size of 19*16.5 mm2 and operates from 2.83 to 10.72 GHz with considerable applications X band (8-12 GHz), upper S band (2-4 GHz), RFID (6.6-7.1GHz) and ITU uplink satellite communication band (8.1-8.4 GHz). We get better return loss, antenna efficiency, VSWR and radiation patterns by doing the simulation.

Research Paper

Various Schemes of set up for Microwave Photonic Filter and its Application

Chotaliya Ankitaben G* , Usha Neelkantan**
* Department of Electronics and Communication Engineering, LD College of Engineering, Ahmedabad, India.
** Head, Department of Electronics and Communication Engineering, LD College of Engineering, Ahmedabad, India.
Ankitaben G, C., and Neelkantan, U. (2018). Various Schemes of Set Up For Microwave Photonic Filter and Its Application. i-manager’s Journal on Communication Engineering and Systems, 7(2), 20-25. https://doi.org/10.26634/jcs.7.2.14437

Abstract

Now a days, the interface between microwave engineering and photonic technology is used in the field of communication and these new interdisciplinary is known as Microwave Photonics (MWP).Microwave photonic filters are photonic subsystems designed with the aim of carrying equivalent tasks to those of an ordinary microwave filter within a radio frequency (RF) system or link.It is well known that in order to satisfy the accelerating demands in communication systems, the integration of optical network and wireless radio is a promising solution. The exceptional qualities of optical fiber as a transmission medium for the success of optical communications is one of the prime motivation for the study and analysis of  microwave photonic filter.This paper describes various set up for Microwve Photonic Filter (MPF) and its application. We investigate all possible set up for MPF and its frequency response and also analyse spectrum of the laser source used.

Research Paper

Achievable uplink capacity with linear detectors and Trade-off Between Spectral Efficiency and Energy Efficiency for Massive MIMO system

Maharshi K. Bhatt* , Bhavin S. Sedani**, K. R. Parmar***
* PG Scholar, Department of Electronics and Communication Engineering, LD College of Engineering, Ahmedabad, India
**-*** Professor, Department of Electronics and Communication Engineering, LD College of Engineering, Ahmedabad, India.
Bhatt, M. K., Sedani, B. S., and Parmar, K. R. (2018). Achievable Uplink Capacity with Linear Detectors and Trade Off Between Spectral Efficiency and Energy Efficiency for Massive Mimo System. i-manager’s Journal on Communication Engineering and Systems, 7(2), 26-30. https://doi.org/10.26634/jcs.7.2.14440

Abstract

This paper performs analysis of massive MIMO system having large number of base station antennas N and user terminals K with uplink and downlink of Time Divison Duplexing system. In this system model pathloss, pilot contamination and antenna correlation for each link is considered. In this work, estimation of achievable rates with several linear detectors like MF (Matched filter) and MMSE (Minimum Mean Square Error) are done. We simulated achievable rate versus number of base station antenna N for MF and MMSE. We observed that performance of MMSE detector is superior in terms of achievable rate compared to MF detector in massive MIMO system. Second, we analyze spectral efficiency and energy efficiency of massive MIMO system with imperfect CSI (Channel State Information measured from uplink pilots). In this analysis we have used MRC (Maximum Ratio Combining) detector and derived spectral efficiency and energy efficiency for different values of transmitted power. From simulation we can observe that as we increase transmitted power, spectral efficiency increased but at the cost of energy efficiency. So there is always trade off between spectral efficiency and energy efficiency. We also observed from simulation that as we increase number of base station antenna trade off curve shifts upwards.

Research Paper

Analysing work tour motifs from GPS Trajectory Data

Jenniffer Joy J* , Dr. Vijaya Samundeeswari**
* Student, Department of Computer Science and Technology, Women's Christian College, Chennai, Tamil Nadu, India.
** Assistant Professor, Department of Computer Science and Technology, Women's Christian College, Chennai, Tamil Nadu, India.
Joy, J. J., and Samundeeswari, V. (2018). Analysing Work Tour Motifs from GPS Trajectory Data. i-manager’s Journal on Communication Engineering and Systems, 7(2), 31-36. https://doi.org/10.26634/jcs.7.2.14442

Abstract

With the objective of gettinga deep insight about the trajectory path and various utilization of GPS trajectory data, a literature review is done on the motifs that can be possibly obtained from the trajectory path. This paper defines one of such ways to model a work tour motif based on the mobility pattern of user’s daily trip from the GPS trajectory path. The segmented trajectory helps in modelling the motif by considering the stay points as motif nodes. By forming such motifs and considering it as a real-world object, various other applications of these data can be coined, which brings out the data from its confinement into a highly influential real-world object. This data analytics can be used to make tracking much easier in traffic synchronizations, forensic case investigations and in various other fields, with the objective of bringing ease of life in each person’s travel routines and reduce the rate of crimes scene happening at thickly populated area.

Research Paper

Performance Evaluation of DSR, AODV, OLSR, and ZRP Protocols in Zigbee

Gurpreet Singh* , Mandeep Kaur**, Kuldeep Kaur***
*-*** Assistant Professor, Department of Computer Science and Engineering, Guru Nanak Dev University, Regional Campus, Sultanpur Lodhi, Kapurthala, India.
Singh, G., Kaur, M., and Kaur, K. (2018). Performance Evaluation of DSR, AODV, OLSR AND ZRP Protocols in ZIGBEE. i-manager’s Journal on Communication Engineering and Systems, 7(2), 37-41. https://doi.org/10.26634/jcs.7.2.14443

Abstract

ZigBee is an IEEE 802.15.4-based specification for a suite of high-level protocols applied to create personal area networks with little, low-power radios, for instance for house automation, medical product knowledge variety and different low-power, low-bandwidth wants for little range jobs which require instant connection.The main focus of this paper is on measuring the performance of ZigBee network. For this purpose, various protocols such as DSR, AODV, OLSR and ZRP have been used along with Netsim Simulator. Theperformanceis analyzed by taking various parameters such as Throughput (Mbps), Delay (Microseconds), Packet Transmitted with the help of routing protocols have been proposed like DSR, OLSR, AODV, ZRP toimprove the routing protocol performance and reliability.

Research Paper

Analysis and Comparison of Rectangular Microstrip Patch Antennas with Omni-Directional Slotted Patch Antenna for Wireless Applications

Dr.Narinder* , Snehdeep Singh**, Dr. Vipul Sharma***
* Professor and Head, Department of Electronics and Communication Engineering, Amritsar College of Engineering and Technology, Amritsar, India.
** PG Scholar, Department of Electronics and Communication Engineering, Amritsar College of Engineering and Technology, Amritsar, India.
*** Associate Professor, Electronics and Communication Engineering, Gurukula Kangri Vishwavidyalaya, Haridwar, India.
Sharma, N., Sandhu, S., and Sharma, V. (2018). Analysis And Comparison Of Rectangular Microstrip Patch Antennas With Omni-Directional Slotted Patch Antenna for Wireless Applications. i-manager’s Journal on Communication Engineering and Systems, 7(2), 42-47. https://doi.org/10.26634/jcs.7.2.14105

Abstract

This paper presents a comparison of rectangular microstrip patch antennas with omnidirectional antenna. It has been observed that different types of designing techniques are employed in existing antennas to achieve desired frequency band of operation. In this proposed work slotted patch with partial ground plane is designed to achieve wideband characteristics. Proposed antenna exhibits the bandwidth of 942MHz and 1194MHz at a frequency of 2.45GHz and 7.52GHz with a gain of 3.87dB and 4.67dB respectively. The higher value of bandwidth and gain makes the proposed antenna a good candidate among the existing antennas presented in this paper. Antennas are analyzed and observed using HFSS V13 software and designed on FR4 glass epoxy substrate with dielectric constant of 4.4 and a thickness of 1.6mm.