Comparative Research Analysis on LTE Techniques to Reduce PAPR in Multi-Carrier Communication Systems
New technologies emerging day by day and main focus to give a better quality of service at low cost. LTE has adopted DFT-spread OFDMA technique as the uplink multiple access schemes which use single carrier modulation and frequency domain equalization. In our research work, we show the PAPR performance of DFT-spreading technique. The performance of PAPR of DFT spreading technique is dependent on the number of subcarriers assigned to each user. In this thesis, a method for PAPR reduction in LTE system has been introduced, which is based on the DFT spread method. DFT spread method is further classified into two methods known as LFDMA (localized FDMA) and IFDMA (interleaved FDMA). It was shown that an interleaved FDMA and localized FDMA perform better than orthogonal FDMA in the uplink transmission where transmitter power efficiency is of great importance in the uplink. LFDMA and IFDMA result in lower average power values due to the fact that OFDM and OFDMA map their input bits straight to frequency symbols where LFDMA and IFDMA map their input bits to time symbols. We conclude that single carrier-FDMA is a better choice on the uplink transmission for cellular systems. Our conclusion is based on the better efficiency due to low PAPR and on the lower sensitivity to frequency offset since SC-FDMA has a maximum of two adjacent users. From results, it can also be concluded that the performance of IFDMA is far better than the LFDMA.
Published by: Ritu, Tajendar Malik
Author: Ritu
Paper ID: V3I4-1225
Paper Status: published
Published: July 24, 2017
Simulink Model Design for FSO Communication System for Analysing Of Different Parameters
In our dissertation work, an approach has been made to analyze the effect of free space transfer function by considering various parameters like path loss factor, atmospheric turbulence, pointing errors on the performance of free space optical (FSO) communication system. The performance of the proposed free space optical communication system is studied by developing a MATLAB simulator. In our research work two cases are considered for two different probabilities when binary codes are generated by Bernoulli generator with 0.5 and 0.4. Finally, we evaluated the Bit Error Rate (BER) and signal to noise ratio (SNR) performance of the proposed system varying with different system parameters. The BER is highly degraded on severe atmospheric turbulence condition ever for a short distance of free space channel. The effect of path loss factor due to dense fog is also severe on the BER even though the turbulence effect and free space distance is short. After Bernoulli generator spectrum analyser used to see result in frequency domain and later on both signal are convoluted with Hadmard code to achieve orthogonality criterion and the passed through AWGN channel and 10db SNR also added the both signal are processed with FSO circuit with different parameters condition and finally BER is received on display. FSO communication is latest trend technology and during this lot of problem have to face and one important parameter is that range. Signal cannot be transmitted to long distance if we transmit then BER also increased and due to which communication is not reliable so we required to work on distance and power utilized and atmospheric condition so that data can be transmitted successfully for a long distance
Published by: Usha, Manisha
Author: Usha
Paper ID: V3I4-1224
Paper Status: published
Published: July 24, 2017
Improvement of Coexistence of LTE Femtocell Network with Dynamic Resource Allocation
In current scenario interference is one of the most challenging problem we are facing in femtocell deployment under the coverage of existing macrocell. Allocation of resources between femtocell and macrocell is essential to counter the effects of interference in dense femtocell networks. Advances in resource management strategies have improved the control mechanism for interference reduction at lower node density, but most of them are ineffective at higher node density. In our research work, a dynamic resource allocation management algorithm for spectrum shared hybrid access is accomplished in femtocell network. In base paper only throughput is represented with FAP but in our research work we set up cognitive radio network (CRN), comparison between power used by Femto cell and macro user and power factor is very important parameters in our daily life and when there is comparison between Femto and macro Femto cell user consume very less power as compared to macro. Besides this in our research work we show the throughput and power used by Femto cell at different floor and result clearly shows that if Femto cell used at same floor then coverage area will be more with respect to that if used at different floor. Power consumption between macro and Femto user shows us that Femto user utilizes very less power as compared to macro user.
Published by: Annu Kumari, Suraj Rana
Author: Annu Kumari
Paper ID: V3I4-1223
Paper Status: published
Published: July 24, 2017
Multipurpose Near Field Communication
Near field communication (NFC) is a short-range wireless protocol that allows users to connect devices and access content and services by simply holding enabled devices near each other. Many of the existing applications (ticketing, purchasing, device configuration, etc.) use NFC as a method to transfer unique identifiers which then inform a larger system. An innovative method of designing a multipurpose near field communication system using RF encoder and decoder. 4-bit encoder and decoder are used for wireless communication so that we are going to use 434 mhz rf receiver and transmitter chip .It will control multiple devices at a time. By using RF encoder we can store data without encoder we can’t send data
Published by: K. Lakshmi, M. Sree Lekha, S. Prem Kumar
Author: K. Lakshmi
Paper ID: V3I4-1216
Paper Status: published
Published: July 24, 2017
Integration of Robust Different Hierarchical Routing Protocol of Wireless Sensor Network
Wireless sensor network is nowadays very popular important in the field of research because the world is now switching faster from wired communication to the wireless communication. In our research work, we have to compare different protocols TEEN, PEGASIS, ECHREP LEACH. It is used in environmental monitoring, habitat monitoring, battlefield etc. WSN is made up of tiny sensor nodes which sense the data and communicate to the base station via other nodes.WSN networks are data-centric rather than node centric. So, main issues in WSN networks are energy consumption of network, the lifetime of a network, delay, latency, quality of service etc.WSN has defined many routing protocols for the network. The main challenge in WSN is to design a routing protocol which gives the maximum energy efficient routing because nodes in a sensor network are equipped with the battery. So, as time passes the battery of nodes will decrease so in turn network lifetime will decrease. There are many routing protocols which are classified as their working and their application to different conditions. This paper describes brief information about routing protocols. The main focus of this paper is to give the comparison of different hierarchical routing protocols. In this Dissertation, we were comparing four routing protocol LEACH, PEGASIS, TEEN and Proposed ECHERP. So we conclude that according to overall performance in hierarchical network ECHERP performance better compare to other routing protocol in WSN.
Published by: Nikita Balhara, Tajendar Malik
Author: Nikita Balhara
Paper ID: V3I4-1214
Paper Status: published
Published: July 22, 2017
Identification and Characterization of Cellulose Degrading Bacteria and Estimation of Its Cellulolytic Capacity
Cellulosic biomass is one of the foreseeable sustainable source of fuels and is also one of the dominating waste materials in nature resulting from human activities. Keeping in view the environmental problems like disposal of large volumes of cellulosic wastes and shortage of fossil fuel in the world, the main aim of the present investigation was to characterize and study the cellulolytic activity of the selected isolate on natural cellulosic substrates viz. finely grated vegetable peels. The cellulose degrading capacity of the isolate was confirmed by Congo red test. By the selection of efficient cellulolytic microorganisms and cost- effective operational techniques, the production of useful end products from the biodegradation of the low cost enormous stock of cellulose in nature can be very beneficial.
Published by: Jeeva Raj
Author: Jeeva Raj
Paper ID: V3I4-1212
Paper Status: published
Published: July 22, 2017
