A Doubly Selective Channel Estimation and Interference Cancellation Scheme in FBMC-OFDM Systems

Filter Bank Multicarrier (FBMC) transmission technique is universally applicable for upcoming wirelesscommunication standard 5G technology in design of physical layer protocol. It is compared to the existing 4G technology such as Orthogonal Frequency Division Multiplexing (OFDM). In OFDM, there are drawbacks like high power consumption, low energy efficiency, high error rate and a smaller number of users. To overcome these problems, main requirement of 5G technology is to increase the data rate about 1000 times. Thus, FBMC is preferable physical layer prototype. FBMC uses one filter for a group of sub carriers. Filter bank multicarrier uses a different modulation technique known as multicarrier modulation. Multicarrier modulation is a form of signal waveform that uses multiple carriers normally closely spaced in a block to carry the information. These blocks of carriers are positioned in a bank known as a filter bank. The performance of each Filter bank multicarrier is considered by Throughput, Data rate, Bit error rate(BER),Mean square error(MSE),Peak to average power ratio(PAPR). The result of this study shows that Filter bank multicarrier depicts a satisfactory improvement in performance

Reviewed Study on Novel Search Mechanism for Web Mining

There are many methodologies for finding patterns in the client's navigation. For instance, acquaints new calculations with retrieve taxonomy of a solitary web webpage from the snap floods of its clients. They have developed a framework to discover how the time influences the client conduct while surfing a web page. That is, they segment the logs of navigation of the clients in various time intervals; and after that they find what time intervals truly meddle with the client conduct

Website Redesign with Animation

To analyse the previous website which means the original website. Trying to make more attractive and interesting. Methods: Analyse the old website. A website redesign shouldn’t just change the overall look of your website. It should enhance the ways in which it functions. Find out what is working on the current website. Building the website design plan. Added strong visual features and elements. Findings: website overall feels outdated i.e., make it more attractive and add some animated clip. Applications: the study highlighted various issues, redesign a IBM company website and you’re going to see that with very small tweaks to the layout and composition and have a dramatic impact on the webs design. The first thing notice is I’m overwhelmed, right in terms of graphic design terms of hierarchies there are so many things here they just try to grab attention, there is a image, styling so that grab my attention so many things are competing for my attention that just overwhelmed so, this is not a good user experience. First thing that that we were thinking about even before trying to get into what we do they even do here on the website is how can we simplify what’s going on here how can we create very clear hierarchies. We were thinking about how we can simplify this visually. A lot of times there’s so many things we can do here such as illustration, 3D rendering of this, do custom photography there’s so many ways to approach this. We can present it in a very interesting wa

Cu/Pd Bimetallic Supported on Mesoporous TiO2 for Suzuki Coupling Reaction

Generally bimetallic catalysts are more superior to monometallic catalysts and provide a better platform for the development of novel catalysts with enhanced activity, selectivity, and stability. In the current work we have prepared Cu/Pd bimetallic supported on mesoporous TiO2 by hydrothermal method. The prepared system was characterized by various physico-chemical techniques such as XRD, TG-DTG, SEM, EDAX, BJH isotherm, and XPS. Thermal stability and complete electronic structure were identified from TG and XPS measurements respectively. The bimetallic system was found to be very active in Suzuki cross-coupling reaction using different substrates. The products were separated and purified by column chromatography and the resultant products were characterized thoroughly by 1H NMR, and FT-IR analysis.

Design and Analysis of FS-TSPC-DET Flip-Flop for IoT Applications

The paper outlines the utmost importance of energy-efficient devices for IoT applications and recommends adual edge-triggeredTSPC flip-flop in fully-static mode at 45nm technology with low supply rail carried out in CMOS using MENTOR GRAPHICS tool.The proposed flip-flop proved to be energy efficient compared to traditional double and single edge-triggered flip-flops in terms of latency, power, the figure of merit and area for IoT applications. A comparison of two types of dual-edge triggered flip-flops are analyzed concerning the mentioned performance metrics and deduces the best flip-flop for IoT applications. Clock overlap issues are turning down in dual edge-triggered TSPC flip-flopcompared with a conventional dual edge-triggered flip-flop in full static modeand allow stringent operation at 1V supply rail thatdelivers1.14uW power, 0.60fJ figure of merit and 531.99ps latency at 45nm CMOS

Temporal and spatial variations in TEC using simultaneous measurements from the Indian GPS network of receivers during the low solar activity period of 2004?2005

International audienceWith the recent increase in the satellite-based navigation applications, the ionospheric total electron content (TEC) and the L-band scintillation measurements have gained significant importance. In this paper we present the temporal and spatial variations in TEC derived from the simultaneous and continuous measurements made, for the first time, using the Indian GPS network of 18 receivers located from the equator to the northern crest of the equatorial ionization anomaly (EIA) region and beyond, covering a geomagnetic latitude range of 1° S to 24° N, using a 16-month period of data for the low sunspot activity (LSSA) years of March 2004 to June 2005. The diurnal variation in TEC at the EIA region shows its steep increase and reaches its maximum value between 13:00 and 16:00 LT, while at the equator the peak is broad and occurs around 16:00 LT. A short-lived day minimum occurs between 05:00 to 06:00 LT at all the stations from the equator to the EIA crest region. Beyond the crest region the day maximum values decrease with the increase in latitude, while the day minimum in TEC is flat during most of the nighttime hours, i.e. from 22:00 to 06:00 LT, a feature similar to that observed in the mid-latitudes. Further, the diurnal variation in TEC show a minimum to maximum variation of about 5 to 50 TEC units, respectively, at the equator and about 5 to 90 TEC units at the EIA crest region, which correspond to range delay variations of about 1 to 8 m at the equator to about 1 to 15 m at the crest region, at the GPS L1 frequency of 1.575 GHz. The day-to-day variability is also significant at all the stations, particularly during the daytime hours, with maximum variations at the EIA crest regions. Further, similar variations are also noticed in the corresponding equatorial electrojet (EEJ) strength, which is known to be one of the major contributors for the observed day-to-day variability in TEC. The seasonal variation in TEC maximizes during the equinox months followed by winter and is minimum during the summer months, a feature similar to that observed in the integrated equatorial electrojet (IEEJ) strength for the corresponding seasons. In the Indian sector, the EIA crest is found to occur in the latitude zone of 15° to 25° N geographic latitudes (5° to 15° N geomagnetic latitudes). The EIA also maximizes during equinoxes followed by winter and is not significant in the summer months in the LSSA period, 2004?2005. These studies also reveal that both the location of the EIA crest and its peak value in TEC are linearly related to the IEEJ strength and increase with the increase in IEEJ

On the validity of the ionospheric pierce point (IPP) altitude of 350 km in the Indian equatorial and low-latitude sector

The GPS data provides an effective way to estimate the total electron content (TEC) from the differential time delay of L1 and L2 transmissions from the GPS. The spacing of the constellation of GPS satellites in orbits are such that a minimum of four GPS satellites are observed at any given point in time from any location on the ground. Since these satellites are in different parts of the sky and the electron content in the ionosphere varies both spatially and temporally, the ionospheric pierce point (IPP) altitude or the assumed altitude of the centroid of mass of the ionosphere plays an important role in converting the vertical TEC from the measured slant TEC and vice versa. In this paper efforts are made to examine the validity of the IPP altitude of 350 km in the Indian zone comprising of the ever-changing and dynamic ionosphere from the equator to the ionization anomaly crest region and beyond, using the simultaneous ionosonde data from four different locations in India. From this data it is found that the peak electron density height (<i>h<sub>p</sub>F<sub>2</sub></i>) varies from about 275 to 575 km at the equatorial region, and varies marginally from 300 to 350 km at and beyond the anomaly crest regions. Determination of the effective altitude of the IPP employing the inverse method suggested by Birch et al. (2002) did not yield any consistent altitude in particular for low elevation angles, but varied from a few hundred to one thousand kilometers and beyond in the Indian region. However, the vertical TEC computed from the measured GPS slant TEC for different IPP altitudes ranging from 250 to 750 km in the Indian region has revealed that the TEC does not change significantly with the IPP altitude, as long as the elevation angle of the satellite is greater than 50 degrees. However, in the case of satellites with lower elevation angles (<50°), there is a significant departure in the TEC computed using different IPP altitudes from both methods. Therefore, the IPP altitude of 350 km may be taken as valid even in the Indian sector but only in the cases of satellite passes with elevation angles greater than 50°

Geomagnetic activity control on VHF scintillations over an Indian low latitude station, Waltair (17.7°N, 83.3°E, 20°N dip)

Using the data of amplitude scintillations recorded at 244 MHz from the geostationary satellite, FLEETSAT (73° E) at a low latitude station, Waltair (17.7°N, 83.3°E, 20°N dip), during the increasing sunspot activity period of 1997-2000, the effect of the geomagnetic storms on the occurrence of ionospheric scintillations has been studied. A total of 60 SC storms studied during this period, following the Aarons' criterion, reveals that the local time of onset of the recovery phase of the geomagnetic storms play an important role in the generation or inhibition of the ionospheric irregularities. Out of the 60 storms studied, nearly 60 to 70% satisfied the categories I, II and III of Aarons' criteria. However, in the remaining 30 to 40% of the cases, no consistent results were observed. Thus, there is a necessity for further investigation of the effect of geomagnetic storms on ionospheric irregularities, particularly with reference to the altitude variations of the F-layer (h'F) relating to the changes in the local electric fields

1,2,3,4-Tetrahydroisoquinolines as inhibitors of HIV-1 integrase and human LEDGF/p75 interaction

Alkaloids are a class of organic compounds with a wide range of biological properties, including anti-HIV activity. The 1,2,3,4-tetrahydroisoquinoline is a ubiquitous structural motif of many alkaloids. Using a short and an efficient route for synthesis, a series of 1,2,3,4-tetrahydroisoquinolines/isoquinolines was developed. These compounds have been analysed for their ability to inhibit an important interaction between HIV-1 integrase enzyme (IN) and human LEDGF/p75 protein (p75) which assists in the viral integration into the active genes. A lead compound 6d is found to inhibit the LEDGF/p75-IN interaction in vitro with an IC50 of similar to 10 mu m. Molecular docking analysis of the isoquinoline 6d reveals its interactions with the LEDGF/p75-binding residues of IN. Based on an order of addition experiment, the binding of 6d or LEDGF/p75 to IN is shown to be mutually exclusive. Also, the activity of 6d in vitro is found to be unaffected by the presence of a non-specific DNA. As reported earlier for the inhibitors of LEDGF/p75-IN interaction, 6d exhibits a potent inhibition of both the early and late stages of HIV-1 replication. Compound 6d differing from the known inhibitors in the chemical moieties and interactions with CCD could potentially be explored further for developing small molecule inhibitors of LEDGF/p75-IN interaction having a higher potency