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

Mixed CSIT DL channel : gains with interference aware receivers

Ghaffar, Rizwan; Salim, Umer; Ghauri, Irfan; Knopp, Raymond

EW 2011, 17th European Wireless Conference, Sustainable Wireless Technologies, April, 27-29, 2011, Vienna, Austria

Best Student Paper Award

            The broadcast channels (BC), a single transmitter   transmitting data to multiple receivers, have been widely studied   in literature mostly with and sometimes without the availability   of channel state information at the transmitter (CSIT). We study   a very practical version of the BC where the transmitter has   CSIT of some users and no CSIT for other users.   We look at the simplest instance of such a heterogeneous BC   where a multi-antenna transmitter base-station (BS) is trying to   communicate data to two single-antenna user equipments (UEs),   having the perfect CSIT about UE-1 and no CSIT about UE-   2. We propose a very simple transmission strategy at the BS   combined with an intelligent interference-aware receiver at UE-   2. We show that under the proposed transmission strategy, the   sum rate can be significantly improved (unbounded in SNR) if   low complexity interference-aware receiver is employed at UE-2   as compared to the case when UEs resort to suboptimal singleuser   detection where rates are bounded (in SNR). We then extend   the proposed transmission strategy to long term evolution (LTE)   scenario and show that the employment of interference aware   receivers significantly improve performance in spite of the low   resolution LTE precoders. It therefore underlines the necessity of   intelligent receivers for modern wireless systems in the pursuit   of high spectral efficiency.

Document Bibtex

Titre:Mixed CSIT DL channel : gains with interference aware receivers
Département:Systèmes de Communication
Eurecom ref:3395
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Bibtex: @inproceedings{EURECOM+3395, year = {2011}, title = {{M}ixed {CSIT} {DL} channel : gains with interference aware receivers }, author = {{G}haffar, {R}izwan and {S}alim, {U}mer and {G}hauri, {I}rfan and {K}nopp, {R}aymond}, booktitle = {{EW} 2011, 17th {E}uropean {W}ireless {C}onference, {S}ustainable {W}ireless {T}echnologies, {A}pril, 27-29, 2011, {V}ienna, {A}ustria }, address = {{V}ienna, {AUTRICHE}}, month = {04}, url = {} }
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