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ICC
2007
IEEE
14 years 2 months ago
2007
IEEE
— Most of the existing works on space-time block codes (STBC) assume the channels are quasi-static, i.e., they remain invariant within one block. This assumption is not always tr...
ICC
2007
IEEE
14 years 2 months ago
2007
IEEE
— Recently an algebraic construction of (nt × Q) space-frequency (SF) codes over finite field Fq was proposed for use in MIMO-OFDM systems, where nt is the number of transmit ...
IWCIA
2004
Springer
14 years 1 months ago
2004
Springer
We consider simple cube-curves in the orthogonal 3D grid of cells. The union of all cells contained in such a curve (also called the tube of this curve) is a polyhedrally bounded s...
VLDB
1987
ACM
14 years 2 days ago
1987
ACM
Thie paper presents a representation echeme for polyhedral objects in arbitrary dimensions. Each object ie represented as the algebraic sum of convex polyhedra (cells). Each cell ...
AAI
2007
13 years 8 months ago
2007
An versatile and modular Electrical Ground Support Equipment (EGSE) system has been developed using Artificial Intelligence (AI) techniques to control and test the PESCA instrumen...