Graduate School and Research Center in Digital Sciences

Enabling the implementation of spatial interweave LTE cognitive radio

Kouassi, Boris; Slock, Dirk TM; Ghauri, Irfan; Deneire, Luc

EUSIPCO 2013, 21st European Signal Processing Conference, 9-13 September 2013, Marrakech, Morocco

LTE the latest mobile network standard, is widely adopted and targets high spectral efficiency. Cognitive radio (CR) systems on the other hand enable smart use of wireless resources leading to significant performance and reliability improvement. Accordingly, adopting the LTE specifications in CR it is a reasonable choice to optimized the spectrum utilisation in wireless communications. In this paper, we investigate some issues in the real-time implementation of a TDD (time division duplex) LTE-based spatial interweave (IW) CR. Indeed, the IW-CR requires the channel state information (CSI) to opportunistically exploit spatial holes for cognitive transmissions. Preliminary works have illustrated the possibility to acquire the CSI through the calibration of the channel reciprocity inherent in TDD systems. However, they consider constant radio frequency (RF) filters, which leads to perturbations in the IW-CR. Hence, we propose a new tracking method to tackle the variation in the RF. The whole system is implemented and evaluated on an experimental platform, where the simulation results reveal performanceenhancement using this new approach.

Document Hal Bibtex

Title:Enabling the implementation of spatial interweave LTE cognitive radio
Keywords:CognitiveRadio, LTE-TDD,Reciprocity- Calibration, Precoding, Channel Estimation
Type:Conference
Language:English
City:Marrakech
Country:MOROCCO
Date:
Department:Communication systems
Eurecom ref:4132
Copyright: © EURASIP. Personal use of this material is permitted. The definitive version of this paper was published in EUSIPCO 2013, 21st European Signal Processing Conference, 9-13 September 2013, Marrakech, Morocco and is available at :
Bibtex: @inproceedings{EURECOM+4132, year = {2013}, title = {{E}nabling the implementation of spatial interweave {LTE} cognitive radio}, author = {{K}ouassi, {B}oris and {S}lock, {D}irk {TM} and {G}hauri, {I}rfan and {D}eneire, {L}uc}, booktitle = {{EUSIPCO} 2013, 21st {E}uropean {S}ignal {P}rocessing {C}onference, 9-13 {S}eptember 2013, {M}arrakech, {M}orocco}, address = {{M}arrakech, {MOROCCO}}, month = {09}, url = {http://www.eurecom.fr/publication/4132} }
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