iosr-JECE   Volume-11 ~ Issue-2 ~ Mar-Apr 2016

Abstract:Many researchers investigated admittance characteristics of standard and nonstandard rectangular wave guides with slots in one of the walls i.e. either broad wall or narrow wall. The analysis of longitudinal slots in the narrow wall of wave guide is available in literature. However,No literature is available on inclined slot in the narrow wall of coupled junction of two waveguides of different bands. From the knowledge of admittance characteristics, the new coupling method provides additional design parameters for the designer.

Keywords: Admittance, discontinuity in modal current, inclined slot, self-reaction, wave guide

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Abstract: Designing An Energy Efficient Routing Protocol For Wireless Sensor Network (WSN) Has For Decades, Been An Elusive Goal To Network Developers And Enthusiasts. This Is Due To The Distributed And Dynamic Topology Of WSN Which Introduces Unique Requirements In Routing Protocols That Should Be Met. To Be Classified As Efficient, Wsns Must Maintain Efficient Energy Consumption And An Extended Network Lifetime.TheSynchronization Of Peer Nodes Incurs Some Overhead For Installing The Communication Network. In This Paper, We Study The Various Routing Protocols And Compare Among Them......

Keywords: Wireless Sensor Networks; Energy Efficiency; Routing Protocols; Cluster Head

[1] N. A. Pantazis, S. A. Nikolidakis And D. D Vergados, "Energy Efficient Routing Protocols In Wireless Sensor Networks: A Survey‟‟, IEEE Communcation Surveys & Tutorials, Vol. 15, No. 2, 2nd Quarter 2013
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[3] Q. Cao, T. Abdelzaher, T. He And R. KRAVETS, "Cluster-Based Forwarding For Reliable End-To-End Delivery In Wireless Sensor Networks‟‟,IEEE Infocom, May 2007

Abstract: Student satellites are launched with an objective to have hands on experience for students to design, implement and realize the space mission. BPSK modem is designed for telecommand receiver of the satellite. The transmitted signal from transmitter is received back efficiently using BPSK modem. Costas loop is designed to self correct the phase and frequency error of the recovered carrier signal observed in squaring loop demodulator. This paper represents the simulation of BPSK modem using squaring loop and costas loop in MATLAB simulink. It is observed that there is a delay of 2 sample units in the received signal using BPSK demodulator.

Keywords: Binary Phase Shift Keying (BPSK), Bit Error Rate (BER), Phase Locked Loop (PLL).

[1] Mr. Pratik A. Bhore , Miss. Mamta Sarde, "BPSK Modulation and Demodulation Scheme on Spartan-3 FPGA", IORD Journal of Science & Technology, Volume 1, Issue III (MAR-APR 2014) PP 38-45.
[2] Muhammad Saad Sohail, Salman Sadruddin, 2014, "FPGA based Telecommand Receiver Module for Microsatellites", Open Journal of communications and software, volume 1.
[3] Dr. AprenT J, Alex.V, Roshna T R, Nivin R,Sherly Joy, 2013 "Design and Implementation of Digital Costas Loop and Bit Synchronizer in
FPGA for BPSK Demodulation", International Conference on Control Communication and Computing.
[4] Haq Nawaz, "Design and Implementation of BPSK Demodulator for Onboard Satellite Telecommand Receiver", IEEE publications, 2015.
[5] Gayathri Devi K.G, Shamla B, 2012 "Design and Implementation of Costas loop for BPSK Demodulator", Annual IEEE Indian Conference(INDICON)..