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TDMA Cooperation Using Spatial Reuse of the Relay Slot with Interfering Power Distribution Information

Cooperative transmission has emerged as an effective tool to combat fading by improving the diversity gain. Although this technique can be viewed as a "virtual" MIMO system, when implemented under orthogonal access it does not allow multiplexing gains. In this work we have studied a possible application of the cooperative transmission in a TDMA centralized cellular system in the downlink. In order to reduce the inefficiency, we have considered the spatial reuse of one relay slot by simultaneous active relays in the cell. To this end we have modeled the interfering power received by each destination in the relay link. It is shown that cooperative transmission with amplify and forward strategy is able to provide significant throughput gains for user-relaying over the direct transmission under TDMA