par Lebrun, Yann;Zhao, Kanglian;Pollin, Sofie;Bourdoux, André 
;Horlin, François ;Lauwereins, Rudy
Référence (29 August-02 September, 2011: Barcelona, Spain), Proc. of the 19th European Signal Processing Conference, EUSIPCO
Publication Publié, 2011-09
;Horlin, François ;Lauwereins, RudyRéférence (29 August-02 September, 2011: Barcelona, Spain), Proc. of the 19th European Signal Processing Conference, EUSIPCO
Publication Publié, 2011-09
Publication dans des actes
| Résumé : | We study the impact of residual carrier frequency offset (CFO) on the performance of the distributed zero-forcing (ZF) beamformer in the interference channel, i.e., where multiple nodes simultaneously transmit the same data towards multiple receivers. Distributed transmissions have been proposed to mitigate the co-channel interference inherent to such scenarios and provide the gains of multi-antenna systems. However, frequency synchronization among the cooperating transmitters is required. Even when the transmitters perform frequency synchronization before transmission, a residual CFO is to be expected that degrades the performance of the system due to the in-phase misalignment of the incoming streams. This paper presents the signal-to-noise ratio analytically and the diversity semi-numerically of the distributed ZF beamformer for the ideal case and in presence of a residual CFO. We illustrate our results and their accuracy through simulations. |
