Estimation of the orbital angular momentum order using a vector antenna in the presence of noise

Cheikh Dieylar Diallo (1, 2) , Duy Kevin Nguyen (1) , Alexandre Chabory (2, 3) , Nicolas Capet (1)

1 CNES - Centre National d'Études Spatiales [Toulouse]
2 EMA - ENAC Equipe TELECOM-EMA
3 TELECOM - ENAC - Equipe télécommunications

— The use of the orbital angular momentum (OAM) may be of interest in the radio-frequency spectrum notably to multiple the number of communication channels. Another way to use this property is to transmit data through the OAM state (Q-bit) of the transmitted wave. In a noiseless environment, the local estimation of the OAM order can be realized by means of a vector antenna that measures the 6 components of the electromagnetic field. In this article, we study the sensitivity to noise of this estimation. The OAM wave is generated via Laguerre-Gauss beams. For several mode orders, signal-to-noise ratio and distances to the transmitter, we perform a statistical analysis from which we obtain a probability of error in the order estimation. We demonstrate that the local estimation of the OAM order is very sensitive to noise, especially in the far-field zone.

Mots clés: OAM; orbital angular momentum; Gauss-Laguerre; noise study; vector antenna; local estimation; local detection; rotation phase fronts

Domaines: Informatique [cs]; Base de données [cs.DB]

Cheikh Dieylar Diallo, Duy Kevin Nguyen, Alexandre Chabory, Nicolas Capet. Estimation of the orbital angular momentum order using a vector antenna in the presence of noise. EuCAP 2014, 8th European Conference on Antennas and Propagation,, Apr 2014, The Hague, Netherlands. pp.3248 - 3252, ⟨10.1109/EuCAP.2014.6902521⟩. ⟨hal-01108946⟩