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

Volume 7 Issue 2 February - April 2018

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.

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

Volume 7 Issue 2 February - April 2018

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.7.2.1443

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.

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

Volume 7 Issue 2 February - April 2018

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.

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

Volume 7 Issue 2 February - April 2018

Research Paper

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

Dubey Suhmita Umeshkumar*, Manish Kumar**

*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.

Cognitive Radio Simulator for Mobile Networks: Design and Implementation

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.

A Survey on Energy Efficient Distributed Clustering Algorithm for Wireless Sensor Networks

Volume 7 Issue 1 November - January 2018

Survey Paper

A Survey on Energy Efficient Distributed Clustering Algorithm for Wireless Sensor Networks

Swagatika Pradhan*, Pawan Patnaik**, S.D. Mishra***

* PG Scholar, Department of Computer Science and Engineering, Bhilai Institute of Technology, Durg (CG), India.

** Associate Professor, Department of Computer Science and Engineering, Bhilai Institute of Technology, Durg (CG), India.

*** Assistant Professor, Department of Computer Science and Engineering, Bhilai Institute of Technology, Durg (CG), India.

Pradhan, S., Patnaik, P., and Mishra, S. D. (2018). A Survey on Energy Efficient Distributed Clustering Algorithm for Wireless Sensor Networks. i-manager’s Journal on Communication Engineering and Systems, 7(1), 35-44.https://doi.org/10.26634/jcs.7.1.13963

Abstract

Wireless sensor networks (WSNs) have a large vary of applications as a result of they will be custom-made for a varied environment. WSNs consist of collection of sensor nodes which has limited processing power and restricted memory unit. Main task of this network is the reliable routing of packets from sensors to the base station (BS). WSNs operate severally in harsh places wherever a person’s presence is risky or perhaps not possible. Since their life time relies on their batteries and replacement and recharging these batteries is not possible in rough places, thus minimizing energy dissipation and increasing the network life period is the primary concern for the sensor networks. Nodes are basically stored in non-overlapping cluster to support scalability, energy efficiency and efficient routing. During this paper, we examine presently proposed clustering algorithms for WSNs. We are going to shortly discuss the operation of that algorithm, and also draw comparison on the performance between the various schemes. Specifically, we are going to examine the performance in term of power and quality aspect of those schemes. This paper ought to give the reader with a basis for analysis in clustering schemes for WSNs.

Light Fidelity Design for Audio Transmission Using Light Dependent Resistor

Volume 7 Issue 1 November - January 2018

Research Paper

Light Fidelity Design for Audio Transmission Using Light Dependent Resistor

Arhum Ahmad*, Tanuja Kashyap**

* PG Student, Bhilai Institute of Technology, Durg (C.G), India.

** Associate Professor, Department of Electronics and Telecommunications Engineering, Bhilai Institute of Technology, Durg (C.G), India.

Ahmad, A., and Kashyap, T. (2018). Light Fidelity Design for Audio Transmission Using Light Dependent Resistor. i-manager’s Journal on Communication Engineering and Systems, 7(1), 29-34. https://doi.org/10.26634/jcs.7.1.13962

Abstract

Light Fidelity (Li-Fi) is based on “illumination” method for transmitting Data by using Light Emitting Diode’s and reception of data by photo sensor as detector. The objective here is to transmit the audio signal through Light Emitting Diode’s and recover the data using Light Dependent resistor. The Li-Fi is having high speed economical adaptation of Wi-Fi on the basis of visible light communication. Due to its better efficiency over radio base technology it has become an idea of keen interest in past few years. This technology not only increases speed of transmitting data but also increases the Capacity, Bandwidth, Security and reduces cost.This can be easily achieved by colour modulation or intensity modulation thus it can be a good solution of all radio frequency issues.