Results 251 to 260 of about 2,172,741 (304)

Calibration of a Polarization Diverse Array

2006 IEEE International Conference on Acoustics Speed and Signal Processing Proceedings, 2006
Direction finding (DF) performance is assessed for an array of airborne vector sensors whose manifold is perturbed. A calibration algorithm explicitly accounting for the polarization diverse nature of the vector sensor is developed. DF performance improvements are demonstrated with use of the proposed calibration algorithm.
Hasan Saeed Mir, John D. Sahr
openaire   +1 more source

Polarization diversity for multiband UWB systems

Signal Processing, 2006
Ultra-wideband (UWB) transmission provides a fast local range wireless connection using the same frequency spectrum assigned to other narrowband communication standards. A precise knowledge of the indoor transmission channel is necessary to obtain high performance.
Fabrizio Argenti, Tiziano Bianchi, Lorenzo Mucchi, Luca Simone Ronga   +3 more
openaire   +3 more sources

Rotation and polarization diversity

2011 IEEE 19th Signal Processing and Communications Applications Conference (SIU), 2011
In this work, we propose and study the performance of a new transmit diversity technique called rotation and polarization diversity. In this technique, in-phase and quadrature components of the rotated symbols are transmitted over two different polarizations of polarized transmitted antenna.
Ahmet Yilmaz, Oguz Kucur
openaire   +1 more source

Polarization diversity in radars

Proceedings of the IEEE, 1986
Polarization, together with the amplitude, time, frequency, phase, and bearing descriptors of radar signals, completes the information which can be obtained on target returns in monostatic radars. The exploitation of information on the echo polarization state through polarimetric radars is currently a subject of interest, due to theoretical and ...
openaire   +2 more sources

Polarization diversity imaging

Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series, Vol.6 (IEEE Cat. No.98CH36178), 1998
We present the potential advantages of using combined imaging systems involving a passive polarimetric thermal imager and a polarimetric laser imager.
S. Breugnot, P. Clemenceau, F. Kerboull-Le Clerc, M. Larive, L. Collot   +4 more
openaire   +1 more source

Polarization diversity in CDMA

IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36194), 2002
Since down-town areas are rapidly becoming littered with antennas, it is of great interest for operators to keep their contribution of antennas to a minimum. Dual polarized antennas may be a solution to reduce the number of antennas, and still obtain a satisfactory antenna diversity gain.
F. Sapienza, M. Nilsson, C. Beckman
openaire   +1 more source

On the resolution of diversely polarized arrays

2016 50th Asilomar Conference on Signals, Systems and Computers, 2016
A self-calibration algorithm is presented for direction finding in the presence of unknown complex sensor gains for diversely polarized arrays. The method jointly estimates the directions of arrival and polarizations of all the sources as well as the unknown gains.
openaire   +2 more sources

Polarization diversity receiver for PMD mitigation

Optical Fiber Communication Conference and Exhibit, 2002
Optical Fiber Communication Conference 2002, Anaheim, California United ...
Lima, A.O., Adali, Tulay, Lima Jr.,Ivan T., Menyuk, Curtis   +3 more
openaire   +1 more source

Statistical processing of polarization diversity images

SPIE Proceedings, 2001
Polarization diversity active imaging techniques have the appealing feature of revealing contrasts that do not appear in conventional intensity images. However, the intensity images provided by the system are in general not useful due to their perturbation by atmospheric turbulence and spatial inhomogeneity of laser sources.
Réfrégier, Philippe, Goudail, François   +1 more
openaire   +2 more sources

True polarization diversity for handset MIMO

Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly, 2009
While many different simulation tools are available to compute MIMO capacity and diversity gain system performance, few works tackle the problem from the measurements standpoint. In this paper, several measurements of MIMO capacity and diversity gain performance of dipole antenna arrays are performed through the use of a reverberation chamber, which ...
Juan F. Valenzuela-Valdés, David A. Sánchez-Hernández   +1 more
openaire   +2 more sources