Zobrazeno 1 - 10
of 211
pro vyhledávání: '"Saleem A. Kassam"'
Autor:
Saleem A. Kassam, Lin He
Publikováno v:
IEEE Transactions on Aerospace and Electronic Systems. 51:397-404
This paper presents an analysis of the near-range imaging performance of an array in terms of the point spread function using a spatially varying coarray formulation. The results demonstrate that the spatially varying coarray formulation allows the p
Publikováno v:
ICASSP
In blind equalization (BE) a cost function based on the fit between the equalizer outputs and the signaling constellation is generally defined. To minimize such a cost function, standard gradient descent learning is commonly used. We exploit the idea
Autor:
Zhengwei Wu, Saleem A. Kassam
Publikováno v:
CISS
Bussgang algorithms for blind equalization (BE) are well-known techniques that use known constellation properties of the source symbols. BE has also been based on independent component analysis (ICA) methods, where independence of the symbols is expl
Autor:
Saleem A. Kassam, Lin He
Publikováno v:
IEEE Transactions on Communications. 56:1765-1768
Two modified blind equalization algorithms are analyzed for performance. These algorithms add a constellation-matched error term to the cost functions of the generalized Sato and multimodulus algorithms. The dynamic convergence behavior and steady-st
Autor:
Zhengwei Wu, Saleem A. Kassam
Publikováno v:
CISS
Blind adaptive equalization has been of long-standing interest, and Bussgang-type algorithms for blind equalization based on gradient descent schemes are well-known. Algorithms based on blind source separation (BSS) have also been of interest. These
Publikováno v:
Signal Processing. 86:3357-3370
Publikováno v:
ACSSC
Blind equalization (BE) has been modeled as a blind source separation (BSS) problem and achieved using BSS algorithms. One drawback of on-line algorithms considered in previous work for blind equalization is their slow convergence. We show that the T
Publikováno v:
IEEE Signal Processing Letters. 12:419-422
Blind source separation (BSS) techniques allow recovery of individual source signals from observed mixtures, exploiting only the assumption of mutual independence of sources. Generally, complex signals are recovered with an arbitrary phase rotation.
Publikováno v:
IEEE Transactions on Aerospace and Electronic Systems. 41:271-283
A coarray-based aperture synthesis scheme using subarrays and postdata acquisition beamforming is presented for through-the-wall wideband microwave imaging applications. The wall causes wave refraction and a change in the propagation speed, both effe
Publikováno v:
IEEE Transactions on Aerospace and Electronic Systems. 40:206-220
A coarray-based near-field, wideband synthetic aperture beamformer using stepped-frequency signal synthesis and post-data acquisition processing is presented. While coarray techniques offer significant reduction in the number of array elements for a