Iterative calculation of optimal output feedback matrices

Assi, Khalil Yehya


Iterative Decision Feedback Equalization and Decoding for Rotated Multidimensional Constellations in Block Fading Channels
Güvensen, Gökhan Muzaffer; Yılmaz, Ali Özgür (2009-04-29)
It is known that rotated multidimensional constellations can be used effectively to achieve full-rate and full-diversity transmission in block fading channels. However, optimal decoding complexity is exponential with the number of fading blocks (or degrees of freedom). In this paper, we propose a reduced-complexity iterative receiver structure operating on a block basis for coded modulation schemes with rotated constellations. The proposed detector is based on iterative forward and backward filtering follow...
Iterative Solutions of Hybrid Integral Equations for Coexisting Open and Closed Surfaces
Ergül, Özgür Salih (Institute of Electrical and Electronics Engineers (IEEE), 2009-6)
We consider electromagnetics problems involving composite geometries with coexisting open and closed conductors. Hybrid integral equations are presented to improve the efficiency of the solutions, compared to the conventional electric-field integral equation. We investigate the convergence characteristics of iterative solutions of large composite problems with the multilevel fast multipole algorithm. Following a thorough study of how the convergence characteristics depends on the problem geometry, formulati...
Iterative methods for tomography problems: implementation to a cross-well tomography problem
Karadeniz, M. Fatih; Weber, Gerhard Wilhelm (2017-08-23)
The velocity distribution between two boreholes is reconstructed by cross-well tomography, which is commonly used in geology. In this paper, iterative methods, Kaczmarz's algorithm, algebraic reconstruction technique (ART), and simultaneous iterative reconstruction technique (SIRT), are implemented to a specific cross-well tomography problem. Convergence to the solution of these methods and their CPU time for the cross-well tomography problem are compared. Furthermore, these three methods for this problem a...
Iterative decoding of convolutionally encoded signals over multipath Rayleigh fading channels
Berthet, AO; Unal, BS; Visoz, R (2001-09-01)
In this paper, we analyze and compare several strategies for iteratively decoding trellis-encoded signals over channels with memory. Soft-in/soft-out extensions of reduced-complexity trellis search algorithms such as delayed decision-feedback sequence estimating (DDFSE) or parallel decision-feedback decoding (PDFD) algorithms are used instead of conventional BCJR and min-log-BCJR algorithms. It has been shown that for long channel impulse responses and/or high modulation orders where the BCJR algorithm beco...
Iterative estimation of total π-electron energy
Türker, Lemi; Gutman, Ivan (National Library of Serbia, 2005)
In this work, the lower and upper bounds for total -electron energy (E) was studied. A method is presented, by means of which, starting with a lower bound EL and an upper bound EU for E, a sequence of auxiliary quantities E0, E1, E2, … is computed, such that E0 = EL, E0 < E1 < E2 < …, and E = EU. Therefore, an integer k exists, such that Ek E < Ek+1. If the estimates EL and EU are of the McClelland type, then k is called the McClelland number. For almost all benzenoid hydrocarbons, k = 3.
Citation Formats
K. Y. Assi, “Iterative calculation of optimal output feedback matrices,” Middle East Technical University, 1991.