Ecole d'ingénieur et centre de recherche en Sciences du numérique

Blind on board wideband antenna RF calibration for multi-antenna satellites

Bazzi, Ahmad; Cottatellucci, Laura; Slock, Dirk TM

ICASSP 2017, 42nd IEEE International Conference on Acoustics, Speech and Signal Processing, March 5-9, 2017, New Orleans, USA

The problem of joint Angle-of-Arrival (AoA) and calibration parameters in a wideband scenario is addressed. The system consists of multiple sources transmitting from different directions and in certain subcarriers. Sources in the same beam are regarded as transmitted from the same AoA and their signals are allocated to different subcarriers while users in different beams may transmit on the same subcarrier, i.e. the signals are multiplexed in space and frequency. Then, signals from a given beam not necessarily occupy the full bandwidth but only specific subcarriers. In addition, due to the wideband of the signal, each RF chain introduces frequency dependent gain and phase shift that need to be calibrated to perform a subsequent demultiplexing in a digital beamforming matrix. We propose a novel blind algorithm that (i) estimates the AoAs of all present sources in the bandwidth of interest and (ii) estimates the different gains/phases at each antenna per frequency up to an unknown impairment at a reference antenna. We provide identifiability conditions that ensure a successful parameter estimation. Finally, the potential of the proposed algorithm compared to the case of known calibration parameters is assessed by simulations.

Document Doi Bibtex

Titre:Blind on board wideband antenna RF calibration for multi-antenna satellites
Mots Clés:Satellite, blind calibration, AoA Estimation, wideband digital beamforming
Type:Conférence
Langue:English
Ville:New Orleans
Pays:ÉTATS-UNIS
Date:
Département:Systèmes de Communication
Eurecom ref:5111
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Bibtex: @inproceedings{EURECOM+5111, doi = {http://dx.doi.org/10.1109/ICASSP.2017.7953367}, year = {2017}, title = {{B}lind on board wideband antenna {RF} calibration for multi-antenna satellites}, author = {{B}azzi, {A}hmad and {C}ottatellucci, {L}aura and {S}lock, {D}irk {TM}}, booktitle = {{ICASSP} 2017, 42nd {IEEE} {I}nternational {C}onference on {A}coustics, {S}peech and {S}ignal {P}rocessing, {M}arch 5-9, 2017, {N}ew {O}rleans, {USA}}, address = {{N}ew {O}rleans, {\'{E}}{TATS}-{UNIS}}, month = {03}, url = {http://www.eurecom.fr/publication/5111} }
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