Satellite UMTS/IMT2000 W-CDMA air interfaces

Taaghol, P.; Evans, B.G.; Buracchini, Enrico; Gaudinaro, G. De; Lee, Woo Jung; Kang, Chung G.

doi:10.1109/35.790970

Cited by 60 publications

(26 citation statements)

References 10 publications

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“…Applies to a lot of network transmission protocol video monitoring system, according to the function and the concrete implementation in the TCP/IP reference model (TCP/IP reference model) of the division, can be divided into the following categories [4]: Network layer protocol: network layer for a network connection between two transport entities exchange network service data unit provides functions and procedures method, it makes the transfer entity independent of routing and switching. The network layer is the lowest level of processing end-to-end transmission, it mainly solve the problem is to know the communication subnet topology and routing selection.…”

Section: Network Communication Protocolmentioning

confidence: 99%

Implementation of Guizhou Ethnic Minorities Culture Resources Based on the Android

Zhou¹

2016

dtetr

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Section: Network Communication Protocolmentioning

confidence: 99%

Implementation of Guizhou Ethnic Minorities Culture Resources Based on the Android

Zhou¹

2016

dtetr

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“…In satellite communications, new technology and applications may require more sophisticated antenna systems that provide quasi-stationary footprints from moving satellites or in-orbit reconfiguration of antenna beams to serve different areas [1,Chapter 12]. Furthermore, satellites play an important role in the proposed Universal Mobile Telecommunication System (UMTS) by providing among other things satellite diversity in both forward and reverse links of the system [2,3].…”

Section: Introductionmentioning

confidence: 99%

Interference avoidance and multiuser MIMO systems

Popescu

Rose

2003

Satell Commun Network

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SUMMARYWe apply interference avoidance methods to multiuser systems with multiple inputs and multiple outputs (MIMO) such as would be used on the uplink (or in overlapping downlink footprints) for satellite systems with multiple antennas. An arbitrary signal space can be used and the method can be applied to any MIMO system model regardless of the choice signal basis functions. Information is transmitted via multicode CDMA where symbols that comprise the data frame from a given user are 'spread' over the available dimensions using a precoding matrix. Optimal precoding matrices that maximize signal-tointerference plus noise-ratio for all symbols/users are then obtained by application of distributed greedy interference avoidance methods. In general, algorithms based on greedy interference avoidance are different from water filling schemes. However, the codeword ensembles obtained provide similar simultaneous water filling solutions and thus maximize sum capacity. Numerical simulations have been performed and the signal-to-noise ratio distribution for receiver antennas and complementary cumulative distribution functions for sum capacity with optimal precoding matrices are also presented.

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“…Examples of application of integrated technology are AMPS/IS-95 cellular network, global positioning system (GPS) applied in cellular network to provide position services, and satellite/cellular network [15], [42]. There is also a growing interest in the integration of cellular network and wireless LAN (WLAN).…”

Section: A Heterogeneous Integrated Wireless Networkmentioning

confidence: 99%

Integrating Heterogeneous Wireless Technologies: A Cellular Aided Mobile Ad Hoc Network (CAMA)

Bhargava

Lü

et al. 2004

Mobile Networks and Applications

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Abstract-A mobile ad hoc network is a collection of wireless terminals that can be deployed rapidly. Its deficiencies include limited wireless bandwidth efficiency, low throughput, large delays, and weak security. Integrating it with a wellestablished cellular network can improve communication and security in ad hoc networks, as well as enrich the cellular services. This research proposes a cellular-aided mobile ad hoc network (CAMA) architecture, in which a CAMA agent in the cellular network manages the control information, while the data is delivered through the mobile terminals (MTs). The routing and security information is exchanged between MTs and the agent through cellular radio channels. A position-based routing protocol, the multi-selection greedy positioning routing (MSGPR) protocol, is proposed. At times due to the complicated radio environment, the position information is not precise. Even in these cases, the MT can still find its reachable neighbors (the association) by exchanging "hello" messages. This association is used in complement with the position information to make more accurate routing decisions. Simulation results show that the delivery ratio in the ad hoc network is greatly improved with very low cellular overhead. The security issues in the proposed architecture and the corresponding solutions are addressed. The experimental study shows that CAMA is much less vulnerable than a pure ad hoc network.Index Terms-heterogeneous networks, ad hoc networks, cellular networks, quality of service, security

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Satellite UMTS/IMT2000 W-CDMA air interfaces

Cited by 60 publications

References 10 publications

Implementation of Guizhou Ethnic Minorities Culture Resources Based on the Android

Implementation of Guizhou Ethnic Minorities Culture Resources Based on the Android

Interference avoidance and multiuser MIMO systems

Integrating Heterogeneous Wireless Technologies: A Cellular Aided Mobile Ad Hoc Network (CAMA)

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