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Full-Text Articles in Computer Engineering
Application Of Ict - I: Power Optimization Of Relay Channels, F Ahmed, Z Howard
Application Of Ict - I: Power Optimization Of Relay Channels, F Ahmed, Z Howard
International Conference on Information and Communication Technologies
Relaying in wireless communication can improve power and quality of service. Multiple nodes share channel resources to achieve optimized power. We consider a model with fixed source, destination and relay nodes. Our model finds the optimal values for power transmission for direct and relayed transmitting nodes. In our problem we compare amplify and forward and decode and forward transmission protocols. Unlike other researchers who use constant achievable rates as objective function and power as constraint, we use the strategy of minimizing relay and source power with achievable and target rates as constraints. We simulate various scenarios and our results indicate …
3d Outside Cell Interference Factor For An Air-Ground Cdma ‘Cellular’ System, David W. Matolak
3d Outside Cell Interference Factor For An Air-Ground Cdma ‘Cellular’ System, David W. Matolak
Faculty Publications
We compute the outside-cell interference factor of a code-division multiple-access (CDMA) system for a three-dimensional (3-D) air-to-ground (AG) "cellular-like" network consisting of a set of uniformly distributed ground base stations and airborne mobile users. The CDMA capacity is roughly inversely proportional to the outside-cell interference factor. It is shown that for the nearly free-space propagation environment of these systems, the outside-cell interference factor can be larger than that for terrestrial propagation models (as expected) and depends approximately logarithmically upon both the cell height and cell radius.