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Construction of optimal spectral methods in phase retrieval

Publications associées (43)

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Effect of Spatio-Temporal Channel Correlation on the Performance of Space-Time Codes

Christina Fragouli

The determinant and rank criteria used for space-time code design apply at high SNR. Code design metrics developed for low SNR assume a channel autocorrelation matrix with equal eigenvalues, which does not hold in many practical scenarios. This paper shows ...

2002

Absorption wavelengths and bandwidths for interstellar searches of C60 in the 2400-4100 Å region

Majed Chergui

Low-temp. gas-phase wavelengths and bandwidths for astronomical searches for C60 in the 2400-4100 Å region are detd. from the absorption spectra of C60 in rare gas matrixes at 4 K, coupled with information on the dependence of the vibronic transition frequ ...

2001

Complex WKB method for 3-level scattering systems

Charles Pfister

In this note the S‐matrix naturally associated with a singularly perturbed three‐dimensional system of linear differential equations without turning point on the real axis is considered. It is shown that for a fairly large class of examples, the Complex WK ...

2000

Matrix vector product for confluent Cauchy-like matrices with applications to confluent rational interpolation

Mohammad Amin Shokrollahi

Many important problems in pure and applied mathematics and engineering can be reduced to linear algebra on dense structured matrices. The structure of these dense matrices is understood in the sense that their n2 entries can be "compressed" to a smaller n ...

2000

A displacement structure approach to decoding algebraic geometric codes

Mohammad Amin Shokrollahi

Using methods originating in numerical analysis, we will develop a unified framework for derivation of efficient list decoding algorithms for algebraicgeometric codes. We will demonstrate our method by accelerating Sudan's list decoding algorithm for Reed- ...

1999

Microstructure and mechanical properties of a high volume fraction SiC particle reinforced AlCu4MgAg squeeze casting

Cyril Cayron

The micro structure and mechanical properties of a high volume fraction SiC particle reinforced AlCu4MgAg alloy produced by squeeze pressurised infiltration of dense packed particle preforms were characterised. It was found that the addition of 60 vol.% 12 ...

1999

Performance of CAP-specified linear algebra algorithms

Roger Hersch, Marc Mazzariol

The traditional approach to the parallelization of linear algebra algorithms such as matrix multiplication and LU factorization calls for static allocation of matrix blocks to processing elements (PEs). Such algorithms suffer from two drawbacks: they are v ...

Springer-Verlag1997

Density matrix propagation and stationary absorption spectra: HCl in rare gas matrixes

Majed Chergui

The computation of stationary optical spectra of mol. systems based on a wavepacket propagation on excited potential energy surfaces (PES) is extended to the condensed phase case in utilizing the d. matrix theory. As an example, a one-dimensional model is ...

1996

This paper provides a detailed analysis that shows how to stabilize the generalized Schur algorithm, which is a fast procedure for the Cholesky factorization of positive-definite structured matrices R that satisfy displacement equations of the form $R - FR ...

Society for Industrial and Applied Mathematics1996

MEUSE: an origin-destination estimator that exploits structure

Michel Bierlaire

This article proposes an improvement of existing methods of origin-destination matrix estimation by an explicit use of data describing the structure of the matrix. These data can be obtained from parking surveys. The new model is applied on both illustrati ...

1995