The existing physical layer security algorithm, which is based on artificial noise, could affect legitimate receivers negatively when the number of users is no less than sending antennas in multi-user MIMO system. In order to improve security of multi-user MIMO system under this scenario, we propose a new multi-user MIMO system physical layer security algorithm based on joint channel state matr...

china is a vast and overpopulated country in the eastern asia whose energy security and supply is the most important factor of economic growth and consequently, economic, social and political security. by the past decades, its leaders have understood the key role of economic growth and development in the economic and political security of china. thus, they have put all their concentration on th...

The electrical power network is a critical infrastructure in today’s society, so its safe and reliable operation is of major concern. State estimators are commonly used in power networks, for example, to detect faulty equipment and to optimally route power flows. The estimators are often located in control centers, to which large numbers of measurements are sent over unencrypted communication c...

The electrical power network is a critical infrastructure in today’s society, so its safe and reliable operation is of major concern. State estimators are commonly used in power networks, for example, to detect faulty equipment and to optimally route power flows. The estimators are often located in control centers, to which large numbers of measurements are sent over unencrypted communication c...

the study assessed the quantity and value of food crop outputs of the gender categories in the anambra state. at this research estimated the quantity and energy content of food stuffs consumed as well as required by each gender headed households, estimated the extent and magnitude of food security and insecurity in the area among the gender categories and examined the determinants of food secur...

Smart grid concept is introduced to modify the power grid by utilizing new information and communication technology. Smart grid needs live power consumption monitoring to provide required services and for this issue, bi-directional communication is essential. Security and privacy are the most important requirements that should be provided in the communication. Because of the complex design of s...