The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Recently, the physical-layer security, which exploits the channel characteristics in order to hide information from unauthorized receivers and does not reliance on the upper-layer encryption, has been proposed as a promising complement to the traditional security schemes. In this paper, the lower bounds on secrecy capacity for indoor visible light communications (VLC) are investigated. The noise is...
The widespread use of mobile devices has led to the continuous innovation of information service technology. This paper analyzes the problems of service implementation in the absence of infrastructure, and proposes a service optimization solution in wireless mobile network environment, which is designed from three levels of service deployment service framework and service optimization, and effectively...
To raise the resource efficiency in Machine-to-Machine (M2M) communication, we realize a new random access (RA) procedure. In the improved RA scheme, we use Code Division Multiple Access (CDMA) to transmit User Equipment Identity (UE ID) and Cyclic Redundancy Check(CRC) information in the first step of RA procedure, and then distinguish each UE and detect preamble collisions in the second step. We...
Hardware-in-the-loop (HITL) simulation method can effectively improve the accuracy and reliability of wireless network simulation, it can be used for hardware test, software test and performance optimization etc. This paper analyzes the deficiency of the OPNET's existing external interface, and presents a HITL simulation interface based on agent (HSIBA), which is used for realizing the protocol mapping...
Multiple antennas, which can significantly increase the channel capacity, is one of the key technologies in the next generation wireless communication systems. In this paper, we present a general multiple antenna evolution platform (GMAP), which is a software-defined radio platform for implementing a real-time multiple-antenna system on a hybrid FPGA/DSP test-bed. Furthermore, two applications implemented...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.