Joint Source-Channel Coding over a Fading Multiple Access Channel with Partial Channel State Information

In this paper we address the problem of transmission of correlated sources over a fast fading multiple access channel (MAC) with partial channel state information available at both the encoders and the decoder. We provide sufficient conditions for transmission with given distortions. Next these conditions are specialized to a Gaussian MAC (GMAC). We provide the optimal power allocation strategy and compare the strategy with various levels of channel state information. Keywords: Fading MAC, Power allocation, Partial channel state information, Correlated sources.Comment: 7 Pages, 3 figures. To Appear in IEEE GLOBECOM, 200

Capacity of Fading Gaussian Channel with an Energy Harvesting Sensor Node

Network life time maximization is becoming an important design goal in wireless sensor networks. Energy harvesting has recently become a preferred choice for achieving this goal as it provides near perpetual operation. We study such a sensor node with an energy harvesting source and compare various architectures by which the harvested energy is used. We find its Shannon capacity when it is transmitting its observations over a fading AWGN channel with perfect/no channel state information provided at the transmitter. We obtain an achievable rate when there are inefficiencies in energy storage and the capacity when energy is spent in activities other than transmission.Comment: 6 Pages, To be presented at IEEE GLOBECOM 201

Synthesis and Antifungal Properties of Some Transition Metal Complexes Involving Potentially Active Heterocyclic Ligands

1 : 1 : 1, M(II)-Npa-TCAjHQ mixed-Iigand complexes [M(II)= = Co(II), Ni(II)), Cu(II) and Zn(II); Npa = N-pyridylanthranilic acid; TCA = thiophene-2-carboxylic acid and HQ = 8-hydroxyquinoline] have been prepared and characterized on the basis of elemental analysis, IR and electronic spectral data, conductivity and magnetic measurements. An octahedral environment around the metal ion has been proposed. ALl the complexes are non-electrolytic in nature. The antifungal activity of the free Iigands and their corresponding metal chelates have been determined on some selected fungi

Synthesis and Antifungal Properties of Some Transition Metal Complexes Involving Potentially Active Heterocyclic Ligands

1 : 1 : 1, M(II)-Npa-TCAjHQ mixed-Iigand complexes [M(II)= = Co(II), Ni(II)), Cu(II) and Zn(II); Npa = N-pyridylanthranilic acid; TCA = thiophene-2-carboxylic acid and HQ = 8-hydroxyquinoline] have been prepared and characterized on the basis of elemental analysis, IR and electronic spectral data, conductivity and magnetic measurements. An octahedral environment around the metal ion has been proposed. ALl the complexes are non-electrolytic in nature. The antifungal activity of the free Iigands and their corresponding metal chelates have been determined on some selected fungi

Studies of some lanthanide quaternary complexes

627-629Formation constants of mixed ligand quaternary lanthanide complexes of the type M-A-B-L'/L" where M = La3+, Pr3+, Nd3+; A=ethylenediamine N, N, N', N' -tetraacetic acid (EDTA); B = thiodiglycolic acid (TDA); L' = iminodiacetic acid (IDA) and L" = glycine(Gly) have been determined by pH-metric technique at 35 ± 1°C in 0.1 mol dm-3 KNO3. Stability constants reveal the orders: La(III) < Pr(III) < Nd(III) in terms of metal ions, binary < ternary < quaternary in terms of complex species, and IDA < Gly in terms of amino acids. The log K values are negative for all the ternary and quaternary systems. However, log K values are significantly positive indicating intramolecular hydrophobic ligand-ligand interactions