Designing and Performance Evaluation of Wireless Communication System Based on Advance STBC
Orthogonal frequency division multiplexing (OFDM) is an emerging technique for high data rate wireless communication systems over frequency selective channels and can be considered as one of the most promising techniques for future wireless system. However, it is well known that OFDM-based systems are sensitive to the inter-carrier interference (ICI) generated by a carrier frequency offset (CFO), which degrades the error probability performance for both single-antenna OFDM systems. Moreover, in a multipath fading environment, performances of OFDM system in a wireless channel are severely degraded by random variations in the amplitude of the received signals as well as by the presence of inter-symbol interference (ISI) and inter-carrier-interference (ICI) which also limit the OFDM system performance. Recently, Alamouti STBC has gained much attention as an effective transmit diversity scheme to provide reliable transmission with high peak data rates to increase the capacity of wireless communication system. In this research work, an advanced method for STBC-OFDM is proposed. The advancements which is done to the existing method is remapping of complex data after STBC encoding and serial to parallel conversion of complex data. This modification actually doubles the length of the data. At the receiver end again demapping of data is done which halfs the data length. This procedure helps in reduction of chances of error in the signal. The main objective of proposed method is to reduced the BER and SER in STBC-OFDM system. For each simulation, blocks of 1024 symbols are simulated. The proposed system is simulated with two transmitter antennas, two receiver antennas. We have used channel conditions, which have two independent paths with path delays in seconds and average path gains = [0 - 20] dB. The performance of the proposed method is compared with that of existing STBC-OFDM system using BER and SER. MATLAB R2013 has been used as an implementation platform to simulate the proposed method. Wireless communication toolbox and generalized MATLAB toolbox is used for the same.
Published by: Shubham Tyagi, Rajesh Kumar
Author: Shubham Tyagi
Paper ID: V3I3-1234
Paper Status: published
Published: May 15, 2017
Review on Structural Software Testing Coverage Approaches
With the aim of discovering software bugs (blunders or different deformities) the test procedures incorporate the way toward executing a program or application, and confirming that the software product is fit for utilize. To assess at least one properties of intrigue the software testing includes the execution of a software part or framework segment. In this paper we review the different software testing and its methods.
Published by: Monika Thakur, Sanjay
Author: Monika Thakur
Paper ID: V3I3-1244
Paper Status: published
Published: May 15, 2017
A Novel Approach for Efficient LDPC Decoding
Recently, LDPC codes have been proved to be capable of closely approaching the channel capacity and hence they are strongly promoted in many international standards. Though decoding is simpler compared to Turbo code decoding, efficient decoding techniques for LDPC codes are in demand to make it further simpler. The theoretical performance of LDPC codes appears simple and close to Shannon’s capacity of channel, but the practical implementation is still challenging due to tasks like numerical inaccuracy, limited memory resources, etc. We investigate methods to reduce the complexity and make decoding simple while still keeping the loss in performance negligible. The aim of this paper is to reduce the complexity by simplification of the component decoders. For this, we analyze the min-sum algorithm and derive a theoretical framework. With this framework, we are able to modify the algorithm in order to achieve good performance for regular as well as irregular LDPC codes.
Published by: B. LasyaSri, B. Ashok Raj, L. Nirmala Devi
Author: B. LasyaSri
Paper ID: V3I3-1281
Paper Status: published
Published: May 15, 2017
A Review on Sensor Network in Smart Grid
The traditional power grid in many countries suffers from high maintenance cost and scalability issues along with the huge expense of building new power stations, and lack of efficiency system monitoring that could increase the overall performance by preventing potential failure. To address these problems, a new generation electric power system called smart grid has been proposed as an evolutionary system for power generation, transmission, and distribution. It utilizes renewable energy generation, smart meters and modern sensing and communication technology for the effective power system. Traditionally, grid management has been realized through wired system formed by communication cables, which involves the heavy cost in terms of installation and maintenance of flexibility, self-organization, and rapid deployment. A smart grid uses digital technology to improve reliability, security, and efficiency of the electric system.
Published by: Priya Sharma, Gitanjali Pandove
Author: Priya Sharma
Paper ID: V3I3-1289
Paper Status: published
Published: May 15, 2017
A Survey on Fingerprint Minutiae Extraction
The modern world is fully computerized and now it has become more and more important to authenticate people in a secure way. Current applications like online banking or online shopping use techniques that depend on personal identification numbers, keys, or passwords. In this paper we have surveyed on various minutiae extraction techniques.
Published by: Illa Singh, Rohini Sharma
Author: Illa Singh
Paper ID: V3I3-1242
Paper Status: published
Published: May 13, 2017
Improve Energy Efficiency in Cognitive Radio Ad Hoc Networks by Selecting Secondary User
Wireless networks combining the advantages of both mobile ad-hoc networks and infrastructure wireless networks have been receiving increased attention due to their ultra-high performance. Users have the capability to sense available spectrum in Cognitive Radio Networks (CRNs).Users can opportunistically access to the spectrum. Paper proposed for energy consumption for CRNs, Which is higher in traditional Cognitive Radio Ad Hoc Network (CRAHNs). Users mainly depend on spectrum access so the requirement of network architecture is user spectral. In the proposed network architecture, only parts of user’s are equipped with Cognitive Radio (CR) module. Additionally, user management done, a minimum number of users are selected to sense available spectrum, which aims at reducing the energy consumption further. The minimum number of users selection problem is formulated as an optimal routing algorithm problem under the constraints of energy efficiency and the real-time available spectrum information. Hence, a distributed optimal routing algorithm is proposed to calculate the optimal solution. The optimal routing algorithm in the proposed network architecture outperforms and traditional Cognitive Radio Ad Hoc Networks in energy efficiency.
Published by: Mr. Raghunath K. Borkar, Prof. Sheshnarayan Ghungrad
Author: Mr. Raghunath K. Borkar
Paper ID: V3I3-1299
Paper Status: published
Published: May 13, 2017
