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Channel identification finds direct application in the growing field of mobile wireless communications. In this paper, we address this problem in the context of multi-users: multiple-input multiple-output (MIMO) channels. To avoid scheduling at the reception we will proceed to a source separation (DOA and DOD estimation) then we will deduct the channel parameters. The estimation of the directions...
A reduced complexity LDPC decoding method for regular LDPC code is extended to irregular LDPC codes; we present in this paper a full description of this method and its benefits for various row weight and length code word. The Split-Row method makes column processing parallelism easier to exploit and significantly simplifies row processors. Simulation results over an additive white Gaussian channel...
The future wireless communication systems require of improvement spectral efficiency. We propose in this paper a solution of the faster at emission-reception of data in a MC-CDMA system. The interest of this technique is able to reduce the time of data processing by using of the fixed point at emission-reception to increase the flows of processing.
In this paper we present Low Density Parity Check decoding algorithm that assemble two different algorithms: Sum-Product and Bit-Flipping; we denote Bit Flipping-Sum Product Algorithm (BFSP). To reduce the bit error rate, we perform the Bit-Flipping algorithm after the Sum-Product algorithm. Simulation results over an additive white Gaussian channel show that the error performance of a LDPC codes...
In this paper a technique using Lyapunov approach for stability analysis of hybrid limit cycle is proposed. The system under consideration is a compass-like biped robot which has continuous dynamic with impulsive effects. After system feedback linearization, we use Lyapunov direct method with LMI formulation to proove stability of the robot periodic gait.
In this paper, we develop a control law to stabilize passive periodic orbits (without external enregy) of a class of autonomous mechanical systems subject to model uncertainties. The dynamic model of such systems is Lagrangian and include multiple phases (modes) and discrete jumps (e. g walking robots). The approach is based in the notion of controlled symmetry (due to spong) which capture the effect...
In this paper one uses some tools of automatic control to stabilize the Moroccan sardine fishery system, the continuous age-structured fishery model is considered. More precisely one takes the ashing effort as a control term the age classes as a states and the total catch as a measured output. One interests in the design of a fishing strategy by constructing a linear feed back control law that permits...
In recent years, several eigenvalues bounds have been investigated separately for the solutions of the continuous and the discrete Riccati and Lyapunov matrix equations. In this paper, lower bounds for the eigenvalues of the solution of the unified Riccati equation (relatively to continuous and discrete cases), are presented. In the limiting cases, the results reduce to some new bounds for both...
Simultaneous eigenvalue bounds for the solution of the unified non-stationary Lyapunov matrix equation are presented. When the solution becomes stationary, the results reduce to bounds of the unified type algebraic Lyapunov equation. In the limiting cases, the results reduce to bounds for the solution of the differential and difference Lyapunov equations. The bounds given in this paper are a generalization...
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