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In this paper, we study the possibility of throughput improvement through precoding in OFDMA based wireless systems with limited channel feedback. Precoding can increase the overall system throughput by selecting the use of higher modulation and coding schemes (if there are any) in each physical resource unit (PRU) under a maximum bit error rate constraint. For a specific form of precoding that we...
In this paper, we investigate the sidelobe power reduction of non-contiguous orthogonal frequency division multiplexing (OFDM) signals using a genetic algorithm (GA) approach. OFDM is widely deployed in numerous wireless access networks since it can achieve high data rate while simultaneously being robust to the effects of multipath propagation. Despite these advantages, OFDM produces a substantial...
Cognitive radios permit dynamic control of physical layer resources such as transmission power and constellation size; these degrees of freedom can be employed to achieve significant improvements in network throughput above that obtainable using conventional radios (with fixed transmission power and constellation size). In this paper we present a unified framework for coordinated resource allocation...
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