Verfahren, Vorrichtung und Computerprogramm zur Verbesserten Interferenzklassifizierung und Geolokation durch Ausnutzung der Trajektorie eines Mobilen Fahrzeugs

Details

Veröffentlichungs-Nr.

EP4068812

Aktenzeichen

EP21305419

Anmeldetag

31. März 2021

Veröffentlichung

12. Juli 2023

Erteilung

12. Juli 2023

Rechtsraum

EP

IPC

H04W4/029H04W4/42G01S5/00G01S5/02H04B17/345

Abstract

The invention relates to the estimation of interferers of a radiofrequency system embarked in a moving vehicle having a known trajectory at each time n, with a non overlapping condition between the interferers considered as K independent active sources of interference having respective positions θ = [θ1,.., θk,.., θK], comprising steps of: - Obtaining observations Zn corresponding to measurement of interference from time instant 1 to N, and building an observation vector Z = [Z1,..,Zn,..,ZN], - Defining a latent variable Vn indicating which source is activated at moment n, to build a vector of latent variables V = [V1,.., Vn,.., VN], and - Implementing a Dirichlet process involving a Gibbs sampling with a Markov chain defined by vector V = [V1,.., Vn,.., VN], the sampling being repeated as follows until convergence: For n = 1, ...,N, if the observation Zn is already associated to a source (S3), remove (S4) observation Zn from its current associated source corresponding to latent variable Vn, and retrieve a position posterior of this source as the observation Zn is no longer belonging to this source; Draw (S5) a new value of latent variable Vn, based on a conditional probability P(Vn = k|V-n,Z-n,Zn) depending on whether a source k pre-existed or not; Associate (S8) the observation Zn to the source corresponding to latent variable Vn, and update the posterior distribution of the position for the source corresponding to latent variable Vn, - and, upon convergence of the algorithm, operating thereby a separation of the interfering sources into K independent measurement sets related respectively to the K interfering sources, and an estimation of each source position with the sources thus separated.

Anmelder

Firmen

Mitsubishi Electric R&D Centre Europe B.V.
Mitsubishi Electric Corporation

Land

🇳🇱 Niederlande

Fachgebiete