Recent trends in electronics & communication systems (vol1, issue2) by STM Journals Publication

eISSN 2393-8757

May - August 2014

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Rajib Kar Department of Electronics & Communication Engineering, NIT Durgapur, West Bengal, India.

Ravibabu Mulaveesala Department of Electrical Engineering, Indian Institute of Technology, Ropar, India.

Usha Sandeep Mehta Institute of Technology (EC-VLSI Design), Nirma University, India.

Vinod Kumar Singh Electrical Engineering, S.R.G.I. , Jhansi, India.

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I take the privilege to present the print version for the [Volume 1 Issue (2)] of Recent Trends in Electronics and Communication Systems. The intension of RTECS is to create an atmosphere that stimulates creativeness, research and growth in the area of in Electronics and Communication Systems. The development and growth of the mankind is the consequence of brilliant Research done by eminent Scientists and Engineers in every field. RTECS provides an outlet for Research findings and reviews in areas of Electronics and Communication found to be relevant for National and International recent developments & research initiative. The aim and scope of the Journal is to provide an academic medium and an important reference for the advancement and dissemination of Research results that support high level learning, teaching and research in the domain of Electronics and Communication. Finally, I would like to thank Editors and Authors for their continued support and invaluable contributions and suggestions in the form of authoring. I express my sincere gratitude and thanks to our Editorial board for providing write ups, reviewing and providing constructive comments for the advancement of the journals. With their continuous support and co-operation, we have been able to publish quality Research/Reviews findings for our customers base. I hope you will enjoy reading this issue and we welcome your feedback on any aspect of the Journal.

Dr. Archana Mehrotra Director STM Journals

Recent Trends in Electronics & Communication Systems

Contents

1. Advances in E-Technologies with ICT-based Innovation and Simulation Priyanka Sethi

2. Design and Performance Analysis of a Compact Ultra-Wide Band Textile Antenna on Jeans Material and Bending Consequences Hasan Shehab S., Hassan S., Arifin F.

3. Study of Spectrum Sensing Techniques for OFDM-based Cognitive Radio Monika Tripathi

4. Survey Based Study of OFDM System and PAPR Reduction Techniques Kandikuppa Anusha, Yashvant Dhiwer, Rakesh Mandal

Recent Trends in Electronics & Communication Systems ISSN: 2393-8757 (online) Volume 1, Issue 2 www.stmjournals.com

Advances in E-Technologies with ICT-based Innovation and Simulation Priyanka Sethi Associate Professor, Dept of Information Technology, SGTBIMIT, GT Karnal Road, Delhi

Abstract Information and Communication Technology (ICT) has led to digital transformation of education, health and development- enabling an escape from the monolithic system.ICT plays a crucial role in revolutionizing the lives of people leading to socio-economic development of the nation. The use of internet in conjunction with electronics has paved the path to universal interconnectedness. The access to technology is driving the masses to new networks with real-time interaction, collaboration and innovation. This paper presents a case study of the application of Electronics (E) as employed in 4 Es viz: EHealth, E-learning, E-government, E-education in capsule form. All these domains are inter-connected.

Keywords: Information and Communication Technology, Digital, Internet, Real-time, E-technology, E-learning, E-government, E-education.

Recent Trends in Electronics & Communication Systems ISSN: 2393-8757 (online) Volume 1, Issue 2 www.stmjournals.com

Design and Performance Analysis of a Compact Ultra-wide Band Textile Antenna on Jeans Material and Bending Consequences Hasan Shehab S.*, Hassan S., Arifin F. Department of Electrical and Electronic Engineering, American International University-Bangladesh (AIUB), Banani, Dhaka-1213, Bangladesh Abstract This paper presents a novel design of a compact Ultra-wide band textile antenna which operates from the frequency range of 2.8–14 GHz, covering the entire ultra-wide band frequency range of 3.1–10.6 GHz, as approved by FCC. Hybrid design technique is applied to a simplified circular patch design and finally an octagonal shape is achieved that exhibits ultra-wide band characteristics. The substrate of the designed antenna is made of jeans fabric (ɛr = 1.7) while patch and the ground plane is made of copper tape. The dimension of the substrate is 42 × 34 mm2. A partial ground plane with a square notch is placed at the back of the substrate. This antenna performance is also analyzed at six different bending angles. The characteristics, low profile, and compact size of the proposed antenna depicts as a potential candidate for ultra-wide band applications. The antenna design details and simulated results are presented by CST Microwave Studio.

Keywords: ultra-wide band, textile antenna, octagonal patch, partial ground, slot

Recent Trends in Electronics & Communication Systems ISSN: 2393-8757 (online) Volume 1, Issue 2 www.stmjournals.com

Study of Spectrum Sensing Techniques for OFDM-based Cognitive Radio Monika Tripathi* Department of Electronics, Madhav Institute of Technology and Science, Gwalior, India Abstract Nowadays OFDM (Orthogonal Frequency Division Multiplexing) techniques are adopted by many existing or progressing wireless communication standards. OFDM’s sensing and spectrum shaping capabilities together with its flexibility and adaptivity make it the best transmission technology for CR system. Spectrum sensing helps to detect the spectrum holes (unutilized bands of the spectrum) providing high spectral resolution capability. Thus, a robust spectrum sensing algorithm for OFDM modulated signals is highly decide to implement CR when the primary signal uses OFDM modulation. Motivated by this demand, a Time-Domain Symbol Cross-correlation based spectrum sensing algorithm (TDSC method) is presented in this paper. The algorithm makes use of the property that the mean of the TDSC of two OFDM symbols is not zero if they have embedded the same frequency-domain pilot tones. We propose a new decision statistic for the signal detection based on the special feature –Cyclic Prefix embedded in OFDM signal. Further, in this paper we used to control the Transmit Power for cognitive radio. Different spectrum sensing techniques for OFDM based cognitive radio are discussed in this paper.

Keywords: Cognative Radio, OFDM, Spectrum Sensing, Energy Detection, Matched Filter, Cyclostationary Feature Detection

Recent Trends in Electronics & Communication Systems ISSN: 2393-8757 (online) Volume 1, Issue 2 www.stmjournals.com

Survey Based Study of OFDM System and PAPR Reduction Techniques Kandikuppa Anusha 1*, Yashvant Dhiwer 2, Rakesh Mandal3 1

Deptt. of E &Tc, PCEM, Bhilai, C.G., India Communication Engg, SSGI, Bhilai, C.G., India 3 Deptt. of E &Tc. Engg. SSGI, Bhilai, C.G., India 2

Abstract The need of Modern wireless communication is achieving high data transmission rate and its robustness against multipath fading and good spectral efficiency MIMO-OFDM system is popular because it provides reliable communication and wide coverage. Orthogonal Frequency Division Multiplexing is a multicarrier modulation technique which is prime choice for high data rate application. To improve performance of OFDM we use various techniques such as channel estimation, signal detection, frequency offset estimation and correction, PAPR reduction (Peak-To-Average-Power-Ratio), Bit Error Rate Reduction using equalization technique and MIMO techniques. MIMO (Multiple Input Multiple Output) wireless communications systems employ multiple transmit and receiving antennas for the improvement in channel capacity. This paper describes the basic introduction of OFDM, MIMO-OFDM system and explains the different channel estimation, optimization techniques and their utilization in communication systems.

Keywords: OFDM, MIMO, PAPR, ISI