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.
Robust adaptive modulation (AM) is a promising technique to improve the spectrum efficiency (SE) of high speed railway (HSR) communication system. Although robust AM transmission schemes with assumption of block fading channel have been extensively investigated, which are no longer valid in the fast time-varying channel due to the channel variation in frame duration. This paper investigates the optimum...
With the rapid development of high-speed railway (HSR), how to provide the passengers with multimedia services has attracted increasing attention. A key issue is to develop an effective scheduling algorithm for multiple services with different quality of service (QoS) requirements. In this paper, we investigate the downlink service scheduling problem in HSR network taking account of end-to-end deadline...
Relay is considered as an effective method to improve the coverage of high data rates, group mobility, temporary network deployment, and cell-edge throughput and provide the coverage in new areas. Mobile relay station (MRS) is considered as an extension of fixed relay in mobile scenarios such as bus, car and train. Doppler diversity is a diversity technique to improve reliability in highspeed scenario,...
In high-speed mobile wireless communication system, the side-effect of Doppler frequency shift is obvious. In order to get rid of it, the estimation of Doppler frequency shift is necessary. This paper proposes a new way to estimate the Doppler frequency shift with a new Rician channel model. The simulation results show that the estimate of Doppler frequency shift is more accurate with the proposed...
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.