The Experts below are selected from a list of 153783 Experts worldwide ranked by ideXlab platform

Subbaiah Jayalalitha - One of the best experts on this subject based on the ideXlab platform.

  • instantaneous d frame driven shunt active filter for harmonics and reactive power mitigation using xilinx system generator
    Ain Shams Engineering Journal, 2019
    Co-Authors: Ramakrishnan Sriranjani, Subbaiah Jayalalitha
    Abstract:

    Abstract Instantaneous d frame driven Shunt active filter (SAF) alleviate harmonics and reactive power. This control Algorithm evolved from elemental synchronous reference frame engenders the fundamental reference signal from the load current with a phase shift of zero angle. The proposed Algorithm is tested in harmonic load and reactive load and it is verified by implementing the model in MATLAB Xilinx system generator. The comparison study was carried out for the proposed Algorithm and Conventional Algorithm and the results are presented in this paper.

  • Instantaneous d frame driven shunt active filter for harmonics and reactive power mitigation using Xilinx System Generator
    Elsevier, 2019
    Co-Authors: Ramakrishnan Sriranjani, Subbaiah Jayalalitha
    Abstract:

    Instantaneous d frame driven Shunt active filter (SAF) alleviate harmonics and reactive power. This control Algorithm evolved from elemental synchronous reference frame engenders the fundamental reference signal from the load current with a phase shift of zero angle. The proposed Algorithm is tested in harmonic load and reactive load and it is verified by implementing the model in MATLAB Xilinx system generator. The comparison study was carried out for the proposed Algorithm and Conventional Algorithm and the results are presented in this paper. Keywords: Harmonics, Reactive power, Shunt active filter, MATLAB, Xilinx system generato

Takashi Dateki - One of the best experts on this subject based on the ideXlab platform.

  • a low complexity pmi ri selection scheme in lte a systems
    Vehicular Technology Conference, 2013
    Co-Authors: Daisuke Ogawa, Chimato Koike, Takashi Seyama, Takashi Dateki
    Abstract:

    Recent wireless radio technologies have utilized precoding matrix and rank adaptation as a technique to increase frequency efficiency. In 3rd generation partnership project (3GPP) long term evolution (LTE) and LTE-advanced (LTE-A) systems, codebook based precoding is utilized. In the codebook based system, a mobile station (MS) needs to estimate optimum channel state information (CSI) which includes a channel quality indicator (CQI), a precoding matrix indicator (PMI) and rank indicator (RI) and to feed back the CSI to the base station (BS) in order to get higher frequency efficiency. Generally, the MS estimates the optimum precoding matrix from all possible precoding matrices which are predefined as the codebook. When such an exhaustive search Algorithm is utilized in LTE-A MS, the MS needs huge computation power because the number of rank and precoding matrix patterns is large in a LTE-A system. In this paper, we propose a novel PMI/RI selection Algorithm which is less complex than the exhaustive search Algorithm in a LTE-A system. After evaluating the throughput performances by simulation and analyzing the computations, it is described that the proposed Algorithm has the same throughput performances as the Conventional Algorithm and 13% of the computations compared with the Conventional Algorithm.

  • VTC Spring - A Low Complexity PMI/RI Selection Scheme in LTE-A Systems
    2013 IEEE 77th Vehicular Technology Conference (VTC Spring), 2013
    Co-Authors: Daisuke Ogawa, Chimato Koike, Takashi Seyama, Takashi Dateki
    Abstract:

    Recent wireless radio technologies have utilized precoding matrix and rank adaptation as a technique to increase frequency efficiency. In 3rd generation partnership project (3GPP) long term evolution (LTE) and LTE-advanced (LTE-A) systems, codebook based precoding is utilized. In the codebook based system, a mobile station (MS) needs to estimate optimum channel state information (CSI) which includes a channel quality indicator (CQI), a precoding matrix indicator (PMI) and rank indicator (RI) and to feed back the CSI to the base station (BS) in order to get higher frequency efficiency. Generally, the MS estimates the optimum precoding matrix from all possible precoding matrices which are predefined as the codebook. When such an exhaustive search Algorithm is utilized in LTE-A MS, the MS needs huge computation power because the number of rank and precoding matrix patterns is large in a LTE-A system. In this paper, we propose a novel PMI/RI selection Algorithm which is less complex than the exhaustive search Algorithm in a LTE-A system. After evaluating the throughput performances by simulation and analyzing the computations, it is described that the proposed Algorithm has the same throughput performances as the Conventional Algorithm and 13% of the computations compared with the Conventional Algorithm.

Ramakrishnan Sriranjani - One of the best experts on this subject based on the ideXlab platform.

  • instantaneous d frame driven shunt active filter for harmonics and reactive power mitigation using xilinx system generator
    Ain Shams Engineering Journal, 2019
    Co-Authors: Ramakrishnan Sriranjani, Subbaiah Jayalalitha
    Abstract:

    Abstract Instantaneous d frame driven Shunt active filter (SAF) alleviate harmonics and reactive power. This control Algorithm evolved from elemental synchronous reference frame engenders the fundamental reference signal from the load current with a phase shift of zero angle. The proposed Algorithm is tested in harmonic load and reactive load and it is verified by implementing the model in MATLAB Xilinx system generator. The comparison study was carried out for the proposed Algorithm and Conventional Algorithm and the results are presented in this paper.

  • Instantaneous d frame driven shunt active filter for harmonics and reactive power mitigation using Xilinx System Generator
    Elsevier, 2019
    Co-Authors: Ramakrishnan Sriranjani, Subbaiah Jayalalitha
    Abstract:

    Instantaneous d frame driven Shunt active filter (SAF) alleviate harmonics and reactive power. This control Algorithm evolved from elemental synchronous reference frame engenders the fundamental reference signal from the load current with a phase shift of zero angle. The proposed Algorithm is tested in harmonic load and reactive load and it is verified by implementing the model in MATLAB Xilinx system generator. The comparison study was carried out for the proposed Algorithm and Conventional Algorithm and the results are presented in this paper. Keywords: Harmonics, Reactive power, Shunt active filter, MATLAB, Xilinx system generato

Erchin Serpedin - One of the best experts on this subject based on the ideXlab platform.

  • Symbol-timing estimation in space-time coding systems based on orthogonal training sequences
    IEEE Transactions on Wireless Communications, 2005
    Co-Authors: S.c. Chan, Erchin Serpedin
    Abstract:

    Space-time coding has received considerable interest recently as a simple transmit diversity technique for improving the capacity and data rate of a channel without bandwidth expansion. Most research in space-time coding, however, assumes that the symbol timing at the receiver is perfectly known. In practice, this has to be estimated with high accuracy. In this paper, a new symbol-timing estimator for space-time coding systems is proposed. It improves the Conventional Algorithm of Naguib et al. such that accurate timing estimates can be obtained even if the oversampling ratio is small. Analytical mean-square error (MSE) expressions are derived for the proposed estimator. Simulation and analytical results show that for a modest oversampling ratio (such as Q equal to four), the MSE of the proposed estimator is significantly smaller than that of the Conventional Algorithm. The effects of the number of transmit and receive antennas, the oversampling ratio, and the length of training sequence on the MSE are also examined.

  • WCNC - Symbol-timing synchronization in space-time coding systems using orthogonal training sequences
    2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733), 2004
    Co-Authors: S.c. Chan, Erchin Serpedin
    Abstract:

    A new symbol-timing estimator for space-time coding systems is proposed. It improves the Conventional Algorithm of Naguib et al. such that accurate timing estimates can be obtained even if the oversampling ratio is small (such as oversampling ratio Q=4). The increase in implementation complexity with respect to that of the Conventional Algorithm is very small. The requirements and the design procedures for the training sequences are discussed. Analytical and simulation results show that the estimation mean square error of the proposed estimator is significantly smaller than that of the Conventional Algorithm.

Daisuke Ogawa - One of the best experts on this subject based on the ideXlab platform.

  • a low complexity pmi ri selection scheme in lte a systems
    Vehicular Technology Conference, 2013
    Co-Authors: Daisuke Ogawa, Chimato Koike, Takashi Seyama, Takashi Dateki
    Abstract:

    Recent wireless radio technologies have utilized precoding matrix and rank adaptation as a technique to increase frequency efficiency. In 3rd generation partnership project (3GPP) long term evolution (LTE) and LTE-advanced (LTE-A) systems, codebook based precoding is utilized. In the codebook based system, a mobile station (MS) needs to estimate optimum channel state information (CSI) which includes a channel quality indicator (CQI), a precoding matrix indicator (PMI) and rank indicator (RI) and to feed back the CSI to the base station (BS) in order to get higher frequency efficiency. Generally, the MS estimates the optimum precoding matrix from all possible precoding matrices which are predefined as the codebook. When such an exhaustive search Algorithm is utilized in LTE-A MS, the MS needs huge computation power because the number of rank and precoding matrix patterns is large in a LTE-A system. In this paper, we propose a novel PMI/RI selection Algorithm which is less complex than the exhaustive search Algorithm in a LTE-A system. After evaluating the throughput performances by simulation and analyzing the computations, it is described that the proposed Algorithm has the same throughput performances as the Conventional Algorithm and 13% of the computations compared with the Conventional Algorithm.

  • VTC Spring - A Low Complexity PMI/RI Selection Scheme in LTE-A Systems
    2013 IEEE 77th Vehicular Technology Conference (VTC Spring), 2013
    Co-Authors: Daisuke Ogawa, Chimato Koike, Takashi Seyama, Takashi Dateki
    Abstract:

    Recent wireless radio technologies have utilized precoding matrix and rank adaptation as a technique to increase frequency efficiency. In 3rd generation partnership project (3GPP) long term evolution (LTE) and LTE-advanced (LTE-A) systems, codebook based precoding is utilized. In the codebook based system, a mobile station (MS) needs to estimate optimum channel state information (CSI) which includes a channel quality indicator (CQI), a precoding matrix indicator (PMI) and rank indicator (RI) and to feed back the CSI to the base station (BS) in order to get higher frequency efficiency. Generally, the MS estimates the optimum precoding matrix from all possible precoding matrices which are predefined as the codebook. When such an exhaustive search Algorithm is utilized in LTE-A MS, the MS needs huge computation power because the number of rank and precoding matrix patterns is large in a LTE-A system. In this paper, we propose a novel PMI/RI selection Algorithm which is less complex than the exhaustive search Algorithm in a LTE-A system. After evaluating the throughput performances by simulation and analyzing the computations, it is described that the proposed Algorithm has the same throughput performances as the Conventional Algorithm and 13% of the computations compared with the Conventional Algorithm.