The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Johannes B. Huber - One of the best experts on this subject based on the ideXlab platform.
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Iterative Equalization With Soft Feedback With a Subsequent Stage Employing Error Search and Correction
IEEE Transactions on Vehicular Technology, 2008Co-Authors: Jurgen F. Rossler, Wolfgang H. Gerstacker, Johannes B. HuberAbstract:In this paper, a second Stage for algorithms applying iterative soft decision interference cancellation (ISDIC) for channel equalization is proposed, which performs error search and correction. Analysis by simulations shows that matched filter (MF)-based ISDIC (MF ISDIC) with Subsequent second Stage can outperform more complex minimum-mean-square-error (MMSE) based ISDIC. Furthermore, the latter can be improved by the proposed second Stage by up to 2 dB. It is shown that the ISDIC schemes with Subsequent second Stage can reach the MF bound up to a fraction of a decibel for all analyzed channels and 4-ary quadrature amplitude modulation (QAM) transmission, and up to 1 dB for 16-ary QAM transmission. In the work of Gerstacker , it has been reported that MF ISDIC performs very well for highly dispersive channels, e.g., with 60 symbol-spaced taps, but for channels of moderate dispersion, an error floor occurs. By utilizing performance bounds for delayed decision-feedback sequence estimation (DDFSE), we show that now for channels of moderate length, e.g., 20 symbol-spaced taps, even low-complexity MF ISDIC with the proposed Subsequent second Stage outperforms a DDFSE approach with states.
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Iterative multiuser detection with soft feedback with a Subsequent Stage utilizing Hopfield networks for error search and correction
2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577), 2004Co-Authors: J.f. Robler, Johannes B. HuberAbstract:In this paper, a second Stage for algorithms applying iterative soft decision interference cancellation (ISDIC) (R. R. Muller and J.B. Huber, 1998) (A. Lampe et. al., Jan., 2001) (J.F. Robler J. B. Huber Nov., 2002) and for multiuser detection is proposed performing error search and correction. Analysis by simulations shows for the considered downlink scenario that the bit error ratio of a matched filter (MF) ISDIC can he lowered by a factor of nearly 100 for high signal-to-noise ratios with the Subsequent second Stage approaching the performance of a more complex minimum mean-squared error (MMSE) ISDIC. Furthermore, the MMSE ISDIC can he improved by the proposed second Stage by up to 0.5 dB. It is shown that the ISDIC scheme with additional second Stage can approach the matched filter bound up to 1 dB for the analyzed channel and 4QAM transmission.
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ICC - Iterative multiuser detection with soft feedback with a Subsequent Stage utilizing Hopfield networks for error search and correction
2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577), 2004Co-Authors: J.f. Robler, Johannes B. HuberAbstract:In this paper, a second Stage for algorithms applying iterative soft decision interference cancellation (ISDIC) (R. R. Muller and J.B. Huber, 1998) (A. Lampe et. al., Jan., 2001) (J.F. Robler J. B. Huber Nov., 2002) and for multiuser detection is proposed performing error search and correction. Analysis by simulations shows for the considered downlink scenario that the bit error ratio of a matched filter (MF) ISDIC can he lowered by a factor of nearly 100 for high signal-to-noise ratios with the Subsequent second Stage approaching the performance of a more complex minimum mean-squared error (MMSE) ISDIC. Furthermore, the MMSE ISDIC can he improved by the proposed second Stage by up to 0.5 dB. It is shown that the ISDIC scheme with additional second Stage can approach the matched filter bound up to 1 dB for the analyzed channel and 4QAM transmission.
Torben Leffers - One of the best experts on this subject based on the ideXlab platform.
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A model for rolling deformation with grain subdivision. Part I: The initial Stage
International Journal of Plasticity, 2001Co-Authors: Torben LeffersAbstract:Abstract A model is presented for plastic deformation with grain subdivision into parallel bands. The experimental reference is the subdivision into “cell blocks” observed in rolled aluminium. The model maintains intragranular strain continuity between the bands with relaxed constraints. One version of the model maintains intergranular strain continuity by imposing identical strains in all grains. Another version does not provide formal fulfilment of intergranular strain continuity, but it tries to minimize strain discontinuity by selection of the appropriate physical solutions. Part I deals with the initial Stage of grain subdivision at low strain. Part II (Leffers, T. 2001. A model for rolling deformation with grain subdivision. Part II: the Subsequent Stage. Int. J. Plasticity 17, 491–511.) deals with the Subsequent Stages at higher strains and the resulting rolling texture.
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a model for rolling deformation with grain subdivision part ii the Subsequent Stage
International Journal of Plasticity, 2001Co-Authors: Torben LeffersAbstract:Abstract Part I of the present work dealt with the initial Stage of plastic deformation with grain subdivision into two band families. It covered the situation with different average strains in the individual grains (the non-Taylor case) and the situation with identical average strains in the individual grains (the Taylor case). For the latter situation part I included solutions with 5 plus 3 and with 4 plus 4 active slip systems in the two band families, respectively. In part II we deal with the Subsequent Stage of plastic deformation (finite strains) for the Taylor case with four active slip systems in each band family. In the Subsequent Stage the cooperation between the two band families leads to an energetic advantage for grain subdivision, and it leads to a simulated texture with decreased sharpness in accordance with experimental observations. Finally, the physics behind grain subdivision are discussed on the basis of the results in Parts I and II and various general considerations.
Matthias Marti - One of the best experts on this subject based on the ideXlab platform.
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an assay to probe plasmodium falciparum growth transmission Stage formation and early gametocyte development
Nature Protocols, 2015Co-Authors: Nicolas M B Brancucci, Ilana Goldowitz, Kathrin Buchholz, Kristine Werling, Matthias MartiAbstract:Conversion from asexual proliferation to sexual differentiation initiates the production of the gametocyte, which is the malaria parasite Stage required for human-to-mosquito transmission. This protocol describes an assay designed to probe the effect of drugs or other perturbations on asexual replication, sexual conversion and early gametocyte development in the major human malaria parasite Plasmodium falciparum. Synchronized asexually replicating parasites are induced for gametocyte production by the addition of conditioned medium, and they are then exposed to the treatment of interest during sexual commitment or at any Subsequent Stage of early gametocyte development. Flow cytometry is used to measure asexual proliferation and gametocyte production via DNA dye staining and the gametocyte-specific expression of a fluorescent protein, respectively. This screening approach may be used to identify and evaluate potential transmission-blocking compounds and to further investigate the mechanism of sexual conversion in malaria parasites. The full protocol can be completed in 11 d.
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An assay to probe Plasmodium falciparum growth, transmission Stage formation and early gametocyte development
Nature Protocols, 2015Co-Authors: Nicolas M B Brancucci, Ilana Goldowitz, Kathrin Buchholz, Kristine Werling, Matthias MartiAbstract:Conversion from asexual proliferation to sexual differentiation initiates the production of the gametocyte, which is the malaria parasite Stage required for human-to-mosquito transmission. This protocol describes an assay designed to probe the effect of drugs or other perturbations on asexual replication, sexual conversion and early gametocyte development in the major human malaria parasite Plasmodium falciparum . Synchronized asexually replicating parasites are induced for gametocyte production by the addition of conditioned medium, and they are then exposed to the treatment of interest during sexual commitment or at any Subsequent Stage of early gametocyte development. Flow cytometry is used to measure asexual proliferation and gametocyte production via DNA dye staining and the gametocyte-specific expression of a fluorescent protein, respectively. This screening approach may be used to identify and evaluate potential transmission-blocking compounds and to further investigate the mechanism of sexual conversion in malaria parasites. The full protocol can be completed in 11 d. This cell culture– and flow cytometry–based assay probes the effect of drugs or other perturbations on asexual replication, sexual conversion and early gametocyte development in the major human malaria parasite Plasmodium falciparum .
Kathrin Buchholz - One of the best experts on this subject based on the ideXlab platform.
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an assay to probe plasmodium falciparum growth transmission Stage formation and early gametocyte development
Nature Protocols, 2015Co-Authors: Nicolas M B Brancucci, Ilana Goldowitz, Kathrin Buchholz, Kristine Werling, Matthias MartiAbstract:Conversion from asexual proliferation to sexual differentiation initiates the production of the gametocyte, which is the malaria parasite Stage required for human-to-mosquito transmission. This protocol describes an assay designed to probe the effect of drugs or other perturbations on asexual replication, sexual conversion and early gametocyte development in the major human malaria parasite Plasmodium falciparum. Synchronized asexually replicating parasites are induced for gametocyte production by the addition of conditioned medium, and they are then exposed to the treatment of interest during sexual commitment or at any Subsequent Stage of early gametocyte development. Flow cytometry is used to measure asexual proliferation and gametocyte production via DNA dye staining and the gametocyte-specific expression of a fluorescent protein, respectively. This screening approach may be used to identify and evaluate potential transmission-blocking compounds and to further investigate the mechanism of sexual conversion in malaria parasites. The full protocol can be completed in 11 d.
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An assay to probe Plasmodium falciparum growth, transmission Stage formation and early gametocyte development
Nature Protocols, 2015Co-Authors: Nicolas M B Brancucci, Ilana Goldowitz, Kathrin Buchholz, Kristine Werling, Matthias MartiAbstract:Conversion from asexual proliferation to sexual differentiation initiates the production of the gametocyte, which is the malaria parasite Stage required for human-to-mosquito transmission. This protocol describes an assay designed to probe the effect of drugs or other perturbations on asexual replication, sexual conversion and early gametocyte development in the major human malaria parasite Plasmodium falciparum . Synchronized asexually replicating parasites are induced for gametocyte production by the addition of conditioned medium, and they are then exposed to the treatment of interest during sexual commitment or at any Subsequent Stage of early gametocyte development. Flow cytometry is used to measure asexual proliferation and gametocyte production via DNA dye staining and the gametocyte-specific expression of a fluorescent protein, respectively. This screening approach may be used to identify and evaluate potential transmission-blocking compounds and to further investigate the mechanism of sexual conversion in malaria parasites. The full protocol can be completed in 11 d. This cell culture– and flow cytometry–based assay probes the effect of drugs or other perturbations on asexual replication, sexual conversion and early gametocyte development in the major human malaria parasite Plasmodium falciparum .
Nicolas M B Brancucci - One of the best experts on this subject based on the ideXlab platform.
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an assay to probe plasmodium falciparum growth transmission Stage formation and early gametocyte development
Nature Protocols, 2015Co-Authors: Nicolas M B Brancucci, Ilana Goldowitz, Kathrin Buchholz, Kristine Werling, Matthias MartiAbstract:Conversion from asexual proliferation to sexual differentiation initiates the production of the gametocyte, which is the malaria parasite Stage required for human-to-mosquito transmission. This protocol describes an assay designed to probe the effect of drugs or other perturbations on asexual replication, sexual conversion and early gametocyte development in the major human malaria parasite Plasmodium falciparum. Synchronized asexually replicating parasites are induced for gametocyte production by the addition of conditioned medium, and they are then exposed to the treatment of interest during sexual commitment or at any Subsequent Stage of early gametocyte development. Flow cytometry is used to measure asexual proliferation and gametocyte production via DNA dye staining and the gametocyte-specific expression of a fluorescent protein, respectively. This screening approach may be used to identify and evaluate potential transmission-blocking compounds and to further investigate the mechanism of sexual conversion in malaria parasites. The full protocol can be completed in 11 d.
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An assay to probe Plasmodium falciparum growth, transmission Stage formation and early gametocyte development
Nature Protocols, 2015Co-Authors: Nicolas M B Brancucci, Ilana Goldowitz, Kathrin Buchholz, Kristine Werling, Matthias MartiAbstract:Conversion from asexual proliferation to sexual differentiation initiates the production of the gametocyte, which is the malaria parasite Stage required for human-to-mosquito transmission. This protocol describes an assay designed to probe the effect of drugs or other perturbations on asexual replication, sexual conversion and early gametocyte development in the major human malaria parasite Plasmodium falciparum . Synchronized asexually replicating parasites are induced for gametocyte production by the addition of conditioned medium, and they are then exposed to the treatment of interest during sexual commitment or at any Subsequent Stage of early gametocyte development. Flow cytometry is used to measure asexual proliferation and gametocyte production via DNA dye staining and the gametocyte-specific expression of a fluorescent protein, respectively. This screening approach may be used to identify and evaluate potential transmission-blocking compounds and to further investigate the mechanism of sexual conversion in malaria parasites. The full protocol can be completed in 11 d. This cell culture– and flow cytometry–based assay probes the effect of drugs or other perturbations on asexual replication, sexual conversion and early gametocyte development in the major human malaria parasite Plasmodium falciparum .
