Results 221 to 230 of about 79,703 (263)

Self-Coherent Receiver for PolMUX Coherent Signals

Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2011, 2011
A compact polarization-diversity self-coherent receiver with reduced complexity is proposed. Requirements on input polarization tracking is relaxed by a variant CMA equalizer. Ex-periments are performed for 50 and 100 Gb/s PolMUX-NRZ-QPSK signals.
Li, J., Schmidt-Langhorst, C., Schmogrow, R., Hillerkuss, D., Lauermann, M., Winter, M., Worms, K., Schubert, C., Koos, C., Freude, W., Leuthold, J.   +10 more
openaire   +1 more source

Adaptive beamforming for coherent signals and interference

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1985
In this paper we introduce a new adaptive array beam-former able to work well even when the desired signal and the interference are coherent. The present adaptive beamformers fail to operate in these cases. The results of simulations support the theoretical predictions.
Tie-Jun Shan, Thomas Kailath
openaire   +1 more source

Optimum beamforming for coherent signal and interferences

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1988
An approach is described to optimum beamforming in the presence of correlated interferences completely overcoming the signal cancellation phenomenon. In contrast with classical adaptive beamforming where no assumptions are made on the statistical properties of the interference and noise, other than their being uncorrelated with the desired signal, the ...
Yoram Bresler, Vellenki Umapathi Reddy, Thomas Kailath   +2 more
openaire   +1 more source

DOA Estimation of Coherent NLFM Signals

2011 Seventh International Conference on Intelligent Information Hiding and Multimedia Signal Processing, 2011
As the prevalence of broadband coherent sources, a novel algorithm for the direction of arrival (DOA) estimation of coherent signals based on DPT and virtual array is introduced. And one of the algorithms is to be done a comparison, analysis and improvement. It can settle the problem of not finding coherent signals in routine algorithm.
Chunxia Gao, Tianqi Zhang, Fangqing Tan, Chao Wang   +3 more
openaire   +1 more source

On maximum-likelihood localization of coherent signals

IEEE Transactions on Signal Processing, 1996
We consider the problem of localizing multiple signal sources in the special case where all the signals are known a priori to be coherent. A maximum-likelihood estimator (MLE) is constructed for this special case, and its asymptotical performance is analyzed via the Cramer-Rao bound (CRB). It is proved that the CRB for this case is identical to the CRB
Jacob Sheinvald, Mati Wax, Anthony J. Weiss   +2 more
openaire   +1 more source

New adaptive processor for coherent signals and interference

ICASSP '84. IEEE International Conference on Acoustics, Speech, and Signal Processing, 1984
In this paper we introduce a new adaptive processor able to work well even when the desired signal and the interference are coherent. The present adaptive processors fail to operate in these cases. The results of simulations appear to confirm the theoretical predictions.
Tie-Jun Shan, Thomas Kailath
openaire   +1 more source

Optimal receiver for coherent signals

Conference on Lasers and Electro-Optics, 2016
We propose a practical receiver scheme for discriminating coherent signals with the error rate unconditionally below the standard quantum limit (or shot noise). For BPSK signals the error rate goes down to the Helstrom bound.
Sych, D., Leuchs, G.
openaire   +2 more sources

A unifying view of coherence in signal processing

Signal Processing, 1992
Abstract The concept of coherence is fundamental and quite important in all fields dealing with fluctuating quantities. Although there is a commonality among the many uses of the term coherence, the precise meaning of this term seems to vary from one field to another and even within some fields.
openaire   +2 more sources

Coherent spectrometry with noise signals

Journal of Magnetic Resonance (1969), 1970
Abstract Coherent spectrometry with noise signals is described as Fourier transform spectrometry with deterministic signals which are samples from a stochastic process. Input-output relations needed for the processing of measured signal records are derived from the theories of linear physical systems and of sampled functions.
openaire   +1 more source

Coherent Transmission of Signals in the Ocean

The Journal of the Acoustical Society of America, 1974
The purpose is to review the coherent signal transmission experiments and theory that were associated with Columbia University's Hudson Laboratory. They are (1) continuous wave transmission (Berman, Clay, Guthrie, Frosch, Poss, Shaffer, Sherry, and Tolstoy); (2) reproducible signal transmissions (Clay, Parvulescu, and Williams); and (3) theory of ...
openaire   +1 more source