Signal-Level Cooperative Spatial Multiplexing for Uplink Throughput Enhancement in MIMO Broadband Systems

Hatim Chergui (1, 2, 3) , Tarik Ait Idir (1, 2, 3) , Mustapha Benjillali (4) , Samir Saoudi (5, 1)

1 SC - Département Signal et Communications
2 Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
3 ExceliaCom - ExceliaCom Solutions (Entreprise)
4 INPT - Institut National des Postes et Télécommunications [Rabat]
5 Lab-STICC_TB_CACS_COM

In this paper, we address the issue of throughputefficient half-duplex constrained relaying schemes for broadband uplink transmissions over multiple-input multiple-output (MIMO) channels. We introduce a low complexity signal-level cooperative spatial multiplexing (CM) architecture that allows for the shortening of the relaying phase without resorting to any symbol detection or re-mapping at the relay side. Half-duplex latency is thereby reduced, resulting in a remarkable throughput gain compared to amplify-and-forward (AF) relaying scheme. Surprisingly, we show that CM strategy becomes more powerful in boosting uplink throughput as the relay approaches cell edge.

Mots clés: Amplify-and-forward relaying scheme; MIMO systems

Domaines: Traitement du signal et de l'image [eess.SP]

Hatim Chergui, Tarik Ait Idir, Mustapha Benjillali, Samir Saoudi. Signal-Level Cooperative Spatial Multiplexing for Uplink Throughput Enhancement in MIMO Broadband Systems. WCNC 2013 : IEEE Wireless Communications and Networking Conference, Apr 2013, Shanghai, China. ⟨hal-00833891⟩