Optimal Beamwidth and Altitude for Maximal Uplink Coverage in Satellite Networks

Optimal Sar Processing Beamwidth for High Altitude Airborne Radar Depth Sounder Data

Future sea-level rise will have significant impacts on populations living in costal regions, and the development of coastal infrastructure. Adaptation to these changes to minimize the negative consequences requires improved sea-level rise predictions. While there are several contributors to changes in sea level, future changes in the Antarctic and Greenland ice sheets are perhaps the least unde...

Uplink-downlink design issues for next generation satellite networks

Next Generation Mobile Systems will implement one’s dream of anywhere, anytime communications. Providing global coverage and mobility, satellite systems will play an important role in order for this to be achieved. The design options of satellite systems include several choices. The basic ones are the choice of orbit, processing and switching, intersatellite links, and link layers technologies....

Power Control and Scheduling For Low SNR Region in the Uplink of Two Cell Networks

In this paper we investigate the sub-channel assignment and power control to maximize the total sum rate in the uplink of two-cell network. It is assumed that there are some sub-channels in each cell which should be allocated among some users. Also, each user is subjected to a power constraint. The underlying problem is a non-convex mixed integer non-linear optimization problem which does not h...

Space Environment and Evaluation of Typical High Altitude Satellite

The space environment consists mainly of high-energy charged particles, such as protons, electrons and heavy ions. They are originating from several sources including galactic cosmic radiation, solar flares and van Allen belts. High energy electromagnetic radiation and neutrons have also been measured on spacecraft. Although shielding can reduce the effect of space radiation it cannot be elimin...

Coverage Quality in Visual Sensor Networks