Related Experiment Video
Updated: Jul 21, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
Published on: September 8, 2023
A hybrid hopfield network-simulated annealing approach for frequency assignment in satellite communications systems
Sancho Salcedo-Sanz1, Ricardo Santiago-Mozos, Carlos Bousoño-Calzón
1Department of Signal Theory and Communications, Universidad Carlos III de Madrid, Leganés-Madrid 28911, Spain.
Abstract:
A hybrid Hopfield network-simulated annealing algorithm (HopSA) is presented for the frequency assignment problem (FAP) in satellite communications. The goal of this NP-complete problem is minimizing the cochannel interference between satellite communication systems by rearranging the frequency assignment, for the systems can accommodate the increasing demands. The HopSA algorithm consists of a fast digital Hopfield neural network which manages the problem constraints hybridized with a simulated annealing which improves the quality of the solutions obtained. We analyze the problem and its formulation, describing and discussing the HopSA algorithm and solving a set of benchmark problems. The results obtained are compared with other existing approaches in order to show the performance of the HopSA approach.
Related Concept Videos
Hybridization of Atomic Orbitals I
Hybridization of Atomic Orbitals II
Linear Approximation in Frequency Domain
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear.
State Space Representation
Consider an RLC circuit, a...
Transfer Function to State Space
In an RLC...
State Space to Transfer Function
The transformation process begins with the state-space representation, characterized by the state equation and the output equation. These equations are typically represented as: