Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 3 of 3 for “"Space-time techniques"”.
-
Novel decoupling networks for small antenna arrays
… arrays with multiple ports are widely used in space-time techniques like diversity reception, MIMO technique, adaptive beamforming or nulling, and direction finding. In the case of size-limited platforms, multiport antenna arrays have element spacing significantly smaller than half wavelength. …
-
Array Signal Processing for Communications from High Altitude Platforms and Other Applications
… even more significant. The adaptive beamforming techniques are also applied in the receiver design for high data rate OFDM signal transmission in the fast-varying underwater acoustic channel. This work is based on experimental data obtained in the Pacific Ocean at a distance of 30 km in 1989. …
-
Fluid-Structure Interaction Modeling of Parachutes with Disreefing and Modified Geometric Porosity and Separation Aerodynamics of a Cover Jettisoned to the Spacecraft Wake
Fluid--structure interaction (FSI) modeling of spacecraft parachutes involves a number of computational challenges. The canopy complexity created by the hundreds of gaps and slits and design-related modification of that geometric porosity by removal of some of the sails and panels are among the …