A Novel estimation and Correction of Channel errors in LTE SYSTEMS

The increase in the number of RF devices and the requirement for large data rates places major role in increasing demand on bandwidth. This necessitates the need for RF communication systems with increased throughput and capacity. MIMO-OFDM is one way to meet this basic requirement. OFDM is used in many (WCD) wireless communication devices and offers high spectral efficiency and resilience to multipath channel effects. Though OFDM is very sensitive to synchronization errors, it makes the task of channel equalization simple. MIMO utilize the multiple antennas to increase throughput without increasing transmitter power or bandwidth. This project presents an introduction to the (MPC) multipath fading channel and describes an appropriate channel model. Many modulation schemes are presented (i.e. BPSK, QPSK, QAM) that are often used in Conjunction with OFDM. Mathematical modeling and analysis of OFDM are given along with a discrete implementation common to modern RF communication systems. Synchronization errors are modeled mathematically and simulated, as well as techniques to estimate and correct those errors at the receiver accurately

Anti pathogenic studies of new mixed ligand metal chelates

189-196Drug discovery aimed at the methodical extermination of life-threatening bacterial infection, especially considering the emergence of multi-drug resistance of pathogenic bacteria has remained a challenge for medicinal inorganic chemistry. In this article, the mixed ligand complexes of Cu (II), Co (II), and Ni (II) containing heterocyclic ligands were synthesized and characterized by IR, LC-MS, UV, and TG-DTA. Complexes are screened for Anti-microbial activity against human pathogenic bacteria

Tharati Village at a Glance

In the Bill & Melinda Gates Foundation (BMGF)- supported Village Dynamics in South Asia (VDSA) Project of the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), 42 villages (18 in the semi-arid tropics (SAT) of peninsular India, 12 in humid tropics of East India, and 12 in Bangladesh) were selected, based on certain relevant characteristics, to track rural poverty in household and village economies in the region, to provide the most efficient way to understand the farming systems in rural areas, and to identify the socioeconomic constraints faced by the farming community. In the SAT region, 18 villages spread across 9 districts in 5 states were identified for the study, of which 6 were chosen way back in 1975 under the erstwhile Village Level Studies (VLS) project of the Economics Program of ICRISAT, while 12 new villages were included in the expanded VDSA project during 2009. Tharati (including the nearby hamlet Ajjihalli) is one of these 12 new villages

Single step process for the synthesis of carbon nanotubes and metal/alloy-filled multiwalled carbon nanotubes

A single-step approach for the synthesis of multi-walled nanotubes (MWNT) filled with nanowires of Ni/ternary Zr based hydrogen storage alloy has been illustrated. We also demonstrate the generation of CO-free hydrogen by methane decomposition over alloy hydride catalyst. The present work also highlights the formation of single-walled nanotubes (SWNT) and MWNTs at varying process conditions. These carbon nanostructures have been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution TEM (HRTEM), Energy dispersive X-ray analysis (EDX) and Raman spectroscopy. This new approach overcomes the existing multi-step process limitation, with possible impact on the development of future fuel cell, nano-battery and hydrogen sensor technologies

Studies on pollen sources for Apis cerana Fabr and Apis mellifera L bees at Muzaffarpur, Bihar, India

At Muzaffarpur, Bihar, in northern India, a total of 40 and 48 plant species served as pollen sources to Apis cerana Fabr and A mellifera L respectively. The major, medium and minor pollen sources were identified. The peak in pollen availability was observed from January to May and again in November. The dearth period was July-August in this area. The main differences in pollen foraging between 2 honey bee species were noted. Each of the species had 13 anemophilous plant species as sources of pollen

Mechanical properties of banana empty fruit bunch fibre reinforced polyester composites

162-167A light weight composite material has been prepared using banana empty fruit bunch fibre (banana-EFB) as reinforcement in polyester resin matrix, and its mechanical properties studied. The composites are formulated up to a maximum fibre volume fraction of about 0.37, resulting in a mean tensile strength of 43 MPa and tensile modulus of 1.06 GPa which are 36% and 68% higher than those of the plain polyester respectively. The flexural strength of banana-EFB composites is decreased, whereas flexural modulus has shown a mixed trend compared to that of plain polyester. The specific flexural modulus of the composite is 1.42 times to that of polyester resin and the work of fracture in impact is found to be 141.7 J/m

Optimum Size Selection For Spring Loaded Detachable Canister Launch Vehicle Interface For Multistage Long Range System

Abstract-Canister-launch vehicle(LV) interface size is optimised using selective assembly method. Any over or under size of the interface is a mission critical. LV and canister are made of nos of sections and their respective positions are fixed in a assembly. Due to tolerance stack up in the assembly shape of the canister and LV varies from a perfect cylinder. Optimum size of the interface is found out for the assemblies where it satisfies the functionality without any interference or extra clearance for canister-LV assembly. Various sets of sections are available for LV and canister in production line and they are assembled selectively based on their effect on final assembly deviation. Assembly deviations are accepted such that the range of deviation for LV or for canister is minimum. One particular size of the interface suits to all the canister-LV combination without affecting the mission requirement. This paper explain how optimum inter face size is decided for sets of canister-LV assemblies based on tolerance stack up model. Selective assembly method and genetic algorithm are used to find out suitable canister-LV combinations. The method of finding out optimum interface size helps to avoid nos of assembly-disassembly trials and related testing to find out suitable canister-LV pair and leaves remote chances of getting some assemblies which does not meet the functional requirement. Keywords- Canister-LV interface, selective assembly, tolerance stack-up, genetic algorithm