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


Volume 2 Issue 4 August - October 2013

Research Paper

Analysis on Modified Booth 2n -1 Multipliers

Shalini* , P. Sampath**
* Research Scholar, ECE Department, Bannari Amman Institute of Technology, Sathyamangalam.
** Associate Professor, ECE Department, Bannari Amman Institute of Technology, Sathyamangalam.
Shalini, R. V., and Sampath, P. (2013). Analysis On Modified Booth 2n-1 Multipliers. i-manager’s Journal on Communication Engineering and Systems, 2(4), 1-6. https://doi.org/10.26634/jcs.2.4.2472

Abstract

2 -1 is one of the commonly used moduli in Residue Number Systems. In this paper the power analysis on Radix-4 8-bit modified booth multiplier is made considering different parallel prefix adder structures. The technology used for the design of multiplier is 0.35μm CMOS technology. The parallel prefix adder structures that are included for the analysis are Kogge Stone adder, Brent Kung adder, Ladner Fischer adder etc. The analysis is made based on the power consumption made by the circuit and the total number of components (in terms of basic gates includes AND, OR and NOT) used for the design. It is found that multiplier structure with Ladner Fischer adder turn out to provide a better design with reduced power and basic gates required compared to other multiplier designs.

Research Paper

Enhancing the Lifetime of Wireless Sensor Network using Cluster Based Approach

Punitha N.* , S. Anandamurugan**
* M.E Student, Department of Information Technology, Kongu Engineering College, Perundurai, Erode.
** Assistant Professor, Department of Information Technology, Kongu Engineering College, Perundurai, Erode.
Punitha, N. and Anandamurugan, S. (2013). Enhancing The Lifetime Of Wireless Sensor Network Using Cluster Based Approach. i-manager’s Journal on Communication Engineering and Systems, 2(4), 7-13. https://doi.org/10.26634/jcs.2.4.2473

Abstract

The utilization of Wireless Sensor Networks (WSNs) to a full extend is limited by the limited energy constraints of the individual sensor nodes. Large part of the research in WSNs focuses on the development of energy efficient routing protocols. Energy usage is the determining factor in the performance of WSNs. Both the methods of data routing and transferring to the base station are very important because the sensor nodes run on battery power and the energy availability for each sensor node is limited. To maximize the lifetime of the sensor node, it is better to share the energy dissipated throughout the sensor network in order to reduce maintenance and enhance the overall system performance. The proposed Cluster based approach is combined with Ladder Diffusion (LD) and Ant Colony Optimization (ACO) to reduce the power consumption and to solve the transmission routing problems in wireless sensor networks. The LD algorithm is employed to route paths for data relay and transmission in wireless sensor networks and it reduces power consumption and processing time to build the routing table. Moreover, to ensure the safety and reliability of data transmission, LD-ACO algorithm provides backup routes to avoid wasted power and processing time, when rebuilding the routing table in case part of sensor nodes are missing.

Research Paper

Video Compression Standards for High Definition Video: A Comparative Study of High Efficiency Video Coding and H.264/MPEG-4 AVC

Geethu Raj* , M.Kannan**
* PG Scholar, Department of ECE, Nandha College of Technology, Erode.
** Assistant Professor, Department of ECE, Nandha College of Technology, Erode.
Raj, G. and Kannan, M. (2013). Video Compression Standards For High Definition Video: A Comparative Study Of High Efficiency Video Coding And H.264/MPEG-4 AVC. i-manager’s Journal on Communication Engineering and Systems, 2(4),14-19. https://doi.org/10.26634/jcs.2.4.2474

Abstract

An increasing number of services and growing popularity of high definition videos are creating much more need for higher coding efficiency. The analysis of design and performance metrics like peak signal-to-noise ratio and subjective quality test evaluate those HEVC encoders can achieve approximately 50% bit rate reduction than H.264/MPEG-4 AVC. The HEVC design is shown to be especially effective for low bit rates, high–resolution video content and low-delay communication applications. This paper also provides an overview and summarizes emerging studies on the coding features of H.262/MPEG-2 video, H.263, MPEG-4 visual.

Research Paper

Performance Analysis of Passive Time Reversal in AWGNChannel and Underwater Acoustic Channel

krishnamoorthy raghavan* , C.D Suriyakala**
* Research Scholar, Sathyabama University, Chennai .
** Professor, Toc H Institute of Science and Technology, Arakkunnam, Ernakulam, Kerala.
Krishnamoorthy, N. R., and Suriyakala, C. D. (2013). Performance Analysis of Passive Time Reversal In AWGN Channel And Underwater Acoustic Channel. i-manager’s Journal on Communication Engineering and Systems, 2(4), 20-24. https://doi.org/10.26634/jcs.2.4.2475

Abstract

The acoustic channel differs from radio channels in many aspects. Two fundamental mechanisms of multipath formations are reflection of the boundaries and ray bending. So the acoustic channels may have extremely long multipath spreads. In addition, the acoustic signals are subjected to temporal and spatial varying multipath channel, which may result in severe Inter Symbol Interference (ISI) for Underwater Acoustic Communication (UAC). These characteristics restrict the range and bandwidth for reliable communications and lead a low data transfer rate. In order to mitigate the ISI, Time Reversal Technique is introduced. The Bit Error Rate (BER) is calculated for UAC and AWGN for different modulation technique.

Research Paper

Improving Energy Efficiency in Wireless Sensor Networks using Duty-Cycling Scheme

V.Shanthini* , K.R.Prasanna Kumar**
* PG Scholar, Department of Information Technology, Kongu Engineering College, Perundurai, Erode.
** Assistant Professor, Department of Information Technology, Kongu Engineering College, Perundurai, Erode.
Shanthini, V. and Kumar, K. R. P. (2013). Improving Energy Efficiency In Wireless Sensor Networks Using Duty-Cycling Scheme. i-manager’s Journal on Communication Engineering and Systems, 2(4), 25-30. https://doi.org/10.26634/jcs.2.4.2476

Abstract

In Wireless sensor networks, the node has limited battery power and it is not possible to recharge or to replace the batteries, therefore power consumption should be minimized so that overall network lifetime will be increased using Asynchronous Duty-cycling scheme. The proposed work is to employ a Efficient Multihop Broadcast Protocol for Asynchronous Duty-cycle (EMBA) which adopts forwarder's guidance and overhears the broadcast message and acknowledge it combined with Greedy Perimeter Stateless Routing (GPSR). A node can broadcast the messages with the guidance to neighbor nodes. With the guidance of the node, the broadcast message is forwarded to neighbor nodes using unicast transmission, and this will reduce redundant transmission and collision. Number of transmissions is reduced by overhearing of broadcast message and acknowledgement and it also minimize the active time of the node. EMBA with GPSR improves the energy efficiency in terms of both duty cycle and energy consumption.