Mobile - Wireless Communications White Papers
Cross-Layer Optimization of OFDM Systems for 4G Wireless Communications
Overview This paper advocates cross-layer optimization over the whole ISO/OSI protocol stack. As an example this paper refers to a system using multiple description coding at application layer combined with orthogonal frequency division multiplexing at the link level to provide robustness against hostile wireless channels. In the proposed optimization design negotiation between application, data link control and physical layer is exploited to increase user quality of service in terms of picture signal to noise ratio and bandwidth efficiency. By means of channel simulation and coding measurements it is shown that this kind of cross layer optimization lead to the best results.
| Publisher | Aalborg University | File Format | PDF, requires Acrobat Rdr 5 |
|---|---|---|---|
| Date Published | August 2004 | Downloads | 85 |
| Format | White Papers | ||
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White Paper RSSAT Commands for GSM/GPRS Wireless Modems: Reference Guide
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GPRS - How Good Is It? A Study from the User's Perspective
This white paper explains GPRS which is implemented as a 2.5G technology upgrade in the form of a network overlay to existing cellular networks. Without requiring the dedication of any...
Intrinsically Safe and Non-Incendive Certified Mobile Computers for Hazardous Environments
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The Time Division Duplex: Mode in the UMTS
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Chosing a Smart Card for Secure Wireless E-Commerce
In order to participate in mobile e-commerce based on the security services offered by a Public Key Infrastructure (PKI), the user must have a portable device that is both physically...
