Results 271 to 280 of about 316,357 (300)

Quaternionic lattices for space-time coding

Proceedings 2003 IEEE Information Theory Workshop (Cat. No.03EX674), 2004
We propose an algebraic framework for studying coherent space-time codes, based on arithmetic lattices on central simple algebras. For two transmit antennas, this algebra is called a quaternion algebra. For this reason, we call these lattices quaternionic lattices. The design criterion is the one described by V. Tarokh et al. (see IEEE Trans.
Jean-Claude Belfiore, Ghaya Rekaya
openaire   +1 more source

Relaxed threaded space-time codes

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005
It is well-known that diversity, despite being widely used as a design criterion, may not be enough to ensure good performance of a wireless system, because the diversity factor may "kick in" at unrealistically high values of SNR. This paper proposes a new class of layered space-time codes with a new design criterion that works well in moderate SNR's ...
Mohammad Janani, Aria Nosratinia
openaire   +1 more source

Differential turbo space-time coding

Proceedings 2001 IEEE Information Theory Workshop (Cat. No.01EX494), 2002
Serial concatenation of standard convolutional or block codes with differential space-time modulation is considered for flat fading multiple antenna channels. Extrinsic information transfer is used to predict thresholds for various outer codes. Using the differential structure of the inner code near coherent performance is obtained without the use of ...
Alex J. Grant, Christian Schlegel
openaire   +1 more source

Space–Time Coding

2015
In MIMO systems, diversity can be achieved by repetition coding, in which different antennas at the transmitter transmit the same information at different time slots. The space–time (ST) coding is more bandwidth-efficient coding scheme, which transmits an information symbol block in a different order from each antenna.
openaire   +1 more source

Exploiting the structure of space-time codes

Proceedings ISCC 2002 Seventh International Symposium on Computers and Communications, 2003
We describe key receiver signal processing algorithms for space-time-coded transmissions over broadband wireless channels. These include channel estimation, equalization, and interference cancellation. Our main theme is exploiting the rich structure of space-time codes to enhance the performance and reduce the complexity of receiver signal processing ...
openaire   +1 more source

High‐Efficiency Synthesizer for Spatial Waves Based on Space‐Time‐Coding Digital Metasurface

Laser and Photonics Reviews, 2020
Jun Yan Dai, Jun Chen Ke, Wankai Tang
exaly  

Active modulation of terahertz vortex beams by Dirac semimetals-based space–time-coding​ metasurface

Optics Communications, 2023
Zhenkai Li, Huiyun Zhang
exaly  

Distributed differential space-time coding for wireless relay networks

IEEE Transactions on Communications, 2008
Yindi Jing, Hamid Jafarkhani
exaly  

Breaking Reciprocity with Space‐Time‐Coding Digital Metasurfaces

Advanced Materials, 2019
Xiao Qing Chen, Rui Wen Shao, Jun Yan Dai   +2 more
exaly  

High-Rate Communication for Underwater Acoustic Channels Using Multiple Transmitters and Space–Time Coding: Receiver Structures and Experimental Results

IEEE Journal of Oceanic Engineering, 2007
Subhadeep Roy, Tolga M Duman, John G Proakis   +2 more
exaly