The Experts below are selected from a list of 27 Experts worldwide ranked by ideXlab platform

Fred Harris - One of the best experts on this subject based on the ideXlab platform.

  • WPMC - Spectral efficiency enhancements utilizing analog RF frontend in-band interference cancellation
    2017 20th International Symposium on Wireless Personal Multimedia Communications (WPMC), 2017
    Co-Authors: Fred Harris
    Abstract:

    Today's radios operate invariably in half duple) mode, i.e., they can either transmit or receive, but not both simultaneously in the same frequency band. The inability to simultaneously transmit and receive inherently reduces the spectral efficiency of a radio channel by 50%. Spectrum scarcity and souped-up demand for data from the smar devices, the wireless networks have been unable to cope with the growing needs of the user community. The realization of the full duplex mode operation in the Prevailing Circumstance has attracted a lot of attention from both industry and academia. The fundamental obstacle in achieving the ful duplex mode operation emanates from the self-induced interference from its own transmitted signal, which interfere with the received Signal of Interest (SoI). Majority of wireles communication systems operate in half duplex mode (inheren inefficiency) to avoid self-interference and to preven desensitizes of their receive chain. The key challenge in achieving the full-duplex radio operation in the same frequency band originates from the huge power differentia between transmitted power and the received signal of interest arriving from a faraway transmitter as well as the nonlinearity of the Radio Frequency Front End (RFFE) transmit/receive components. This large power differential saturates the Low Noise Amplifiers (LNA) and overwhelms the dynamic range o the Analog to Digital Converter (ADC) in the receive chain raising the Receive (Rx) noise floor to an undesirably high level. Many analog and digital cancellation techniques have been proposed and implemented with limited success in specific environments. A more generic technique, which allow for adaptive cancellation of interference from various source in dynamic environment, has been studied, implemented, and the result has been documented in this paper.

  • Spectral efficiency enhancements utilizing analog RF frontend in-band interference cancellation
    2017 20th International Symposium on Wireless Personal Multimedia Communications (WPMC), 2017
    Co-Authors: Fred Harris
    Abstract:

    Today's radios operate invariably in half duple) mode, i.e., they can either transmit or receive, but not both simultaneously in the same frequency band. The inability to simultaneously transmit and receive inherently reduces the spectral efficiency of a radio channel by 50%. Spectrum scarcity and souped-up demand for data from the smar devices, the wireless networks have been unable to cope with the growing needs of the user community. The realization of the full duplex mode operation in the Prevailing Circumstance has attracted a lot of attention from both industry and academia. The fundamental obstacle in achieving the ful duplex mode operation emanates from the self-induced interference from its own transmitted signal, which interfere with the received Signal of Interest (SoI). Majority of wireles communication systems operate in half duplex mode (inheren inefficiency) to avoid self-interference and to preven desensitizes of their receive chain. The key challenge in achieving the full-duplex radio operation in the same frequency band originates from the huge power differentia between transmitted power and the received signal of interest arriving from a faraway transmitter as well as the nonlinearity of the Radio Frequency Front End (RFFE) transmit/receive components. This large power differential saturates the Low Noise Amplifiers (LNA) and overwhelms the dynamic range o the Analog to Digital Converter (ADC) in the receive chain raising the Receive (Rx) noise floor to an undesirably high level. Many analog and digital cancellation techniques have been proposed and implemented with limited success in specific environments. A more generic technique, which allow for adaptive cancellation of interference from various source in dynamic environment, has been studied, implemented, and the result has been documented in this paper.

Hongguang Li - One of the best experts on this subject based on the ideXlab platform.

  • The Impact of Organizational Aspects on Successful Adoption of Decision Support System in Developing Countries: The Context of Libyan Higher Education Ministry
    Developing Country Studies, 2020
    Co-Authors: Abubaker Kashada, Hongguang Li
    Abstract:

    Decision Support Systems are the information application programs that analyze data and present it in a way that makes it easier to make acumen decisions dependent on the Prevailing Circumstance. This paper provides research grounds for implementing and designing the decision support systems. The paper generally talks about the adoption of decision support systems in developing countries. Most of the firms in the developing countries reveal an advanced use of computerized services. Most developing countries employ the use of DSS in the organizations not because of being competitive but because of the business requirements which are always immediate (Power 124). The organizations that have successfully employed the use of DSS have been seen to be successful. The researcher begins with a brief introduction and background of the study topic, continue with a section of data analyzing, exploration, reduction, factor analysis and discussion, provide numerous recommendations based on the information obtained and conclude the paper. Keywords: Decision Support Systems, Adoption of Decision Support Systems, Developing Countries, Factors Influencing the Decision Support Systems

Abubaker Kashada - One of the best experts on this subject based on the ideXlab platform.

  • The Impact of Organizational Aspects on Successful Adoption of Decision Support System in Developing Countries: The Context of Libyan Higher Education Ministry
    Developing Country Studies, 2020
    Co-Authors: Abubaker Kashada, Hongguang Li
    Abstract:

    Decision Support Systems are the information application programs that analyze data and present it in a way that makes it easier to make acumen decisions dependent on the Prevailing Circumstance. This paper provides research grounds for implementing and designing the decision support systems. The paper generally talks about the adoption of decision support systems in developing countries. Most of the firms in the developing countries reveal an advanced use of computerized services. Most developing countries employ the use of DSS in the organizations not because of being competitive but because of the business requirements which are always immediate (Power 124). The organizations that have successfully employed the use of DSS have been seen to be successful. The researcher begins with a brief introduction and background of the study topic, continue with a section of data analyzing, exploration, reduction, factor analysis and discussion, provide numerous recommendations based on the information obtained and conclude the paper. Keywords: Decision Support Systems, Adoption of Decision Support Systems, Developing Countries, Factors Influencing the Decision Support Systems

Pedro R.r. Rochedo - One of the best experts on this subject based on the ideXlab platform.

  • Radiological emergencies in a tropical climate country: Developing a multi-criteria decision tool
    Radioprotection, 2020
    Co-Authors: Elaine R. R. Rochedo, Maria Angélica Vergara Wasserman, D. N. G. Silva, Pedro R.r. Rochedo
    Abstract:

    One of the permanent concerns in the international scenario is the study of the consequences of nuclear and radiological accidents and other events that lead to the contamination of the environment and the exposure of members of the public as a consequence of this contamination. Decision-making in such situations need to be based in solid technical criteria but must also take into account the actual Prevailing Circumstance in order to reach optimized measures to protect people and the environment. The Multi-criteria Analysis Method is already being used for similar applications in some European countries but it is necessary that the criteria are established taking in account economic, social and climatic aspects that can affect the selection of protective measures applicable to specific regions, and the selection of the different weights to be associated to the different criteria that are to be applied to different social-politic environments. The present work describes the developments to support the decision making process for the implementation of protective measures to protect the public in situations of radiological accidents in Brazil, the steps already developed and the current status of the system under development, discusses the difficulties found and stresses the needs for future developments.

Elaine R. R. Rochedo - One of the best experts on this subject based on the ideXlab platform.

  • Radiological emergencies in a tropical climate country: Developing a multi-criteria decision tool
    Radioprotection, 2020
    Co-Authors: Elaine R. R. Rochedo, Maria Angélica Vergara Wasserman, D. N. G. Silva, Pedro R.r. Rochedo
    Abstract:

    One of the permanent concerns in the international scenario is the study of the consequences of nuclear and radiological accidents and other events that lead to the contamination of the environment and the exposure of members of the public as a consequence of this contamination. Decision-making in such situations need to be based in solid technical criteria but must also take into account the actual Prevailing Circumstance in order to reach optimized measures to protect people and the environment. The Multi-criteria Analysis Method is already being used for similar applications in some European countries but it is necessary that the criteria are established taking in account economic, social and climatic aspects that can affect the selection of protective measures applicable to specific regions, and the selection of the different weights to be associated to the different criteria that are to be applied to different social-politic environments. The present work describes the developments to support the decision making process for the implementation of protective measures to protect the public in situations of radiological accidents in Brazil, the steps already developed and the current status of the system under development, discusses the difficulties found and stresses the needs for future developments.