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Cognitive Radio (CR) has attracted much attention for its ability allowing secondary users (SUs) to share the spectrum with licensed users (PUs). The precondition that PUs bear the coexistence of SUs is that the interference caused by SUs should be under a given threshold. Therefore the main challenge of CR is interference control or even interference cancellation. In this work we employ zero-forcing...
Optimizing wireless networks represents a complex task, which directly affects quality, cost, coverage, and capacity. In this paper, we propose a new automated method of simultaneously maximizing coverage while minimizing interference for a desired level of coverage overlap. The proposed method represents a novel approach, as it focuses on network parameters that can be represented by continuous variables...
In this paper, we propose a cross-layer optimization approach that exploits retransmission diversity in wireless CDMA communications. Conventionally, data packets that are not correctly detected are usually dropped. These dropped packets can be used to help data packet detection. By exploiting all the retransmitted packets, data packets can be correctly detected with higher probability. The proposed...
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