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In wireless ad hoc networks, cross-layer design aims at reducing multiple access interference and thus obtaining a higher spatial reuse. In order to identify the most suitable solution for future wireless systems, the authors compared the aggregate throughput achieved by two types of cross-layer designs. While the first approach suppresses the interference by power control at the transmitter side, the second cancels interference at the receiver with a technique called multiuser detection. It turned out that applying power control as basis for cross-layer design in very high traffic density scenarios can result in even worse performance than applying no cross-layer design at all.
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