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.
The next generation satellite networks will provide broadband communications at low cost. The recent developments in satellites technology, transmission techniques, antennas, and launch capabilities have enabled a new generation of services to be made available to users especially when communications satellites have been widely considered to complement the terrestrial systems. In this paper, a survey...
An enhanced adaptive scheme based on threshold method with a reduced complexity that combine adaptive modulation and coding with diversity combining is presented for throughput maximization in broadband code division multiple access (CDMA) satellite networks. The proposed algorithm is a modify, enhanced, and more robust version of the existing algorithms for adaptive transmission rate and modulation...
The performance of a satellite systems depend on the propagation mode of the radio waves. The nature of satellite channel is one of the biggest obstacle facing the design of communications systems. This characterised satellite channels by fading and interference. Moreover, satellite communication systems are limited by available transmitting power and bandwidth. Signal power could be reduced while...
A prioritised adaptive CDMA scheme in which processing gain is given priority over modulation and coding schemes (MCS) in wireless systems is presented. The need for such design is necessary for increased bit rate. A scheme that has the capability to optimise both throughput and quality of service without sacrificing the required bit rate is designed. This is applied to direct sequence code division...
A new approach that characterised satellite mobile transmission system is proposed and described in this paper. This paradigmatic agent-based system is required for the future wireless communication system for effectiveness and robustness. We examine adaptive BPSK/QPSK for Rice-lognormal mobile satellite channel. We compare the behaviour of the fixed modulation transmission with adaptive schemes and...
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.