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Orthogonal frequency division multiplexing (OFDM) is a spectrally efficient technique for wireless communication systems. However, its high peak to average power ratio (PAPR) is the major drawback. Recently the phase reversal (PR) scheme has been proposed for reducing PAPR. In this paper, we propose a modified PR scheme called the iterative PR scheme to reduce PAPR more effectively. As a result, better...
Consider a scenario in which K users and a jammer have a limited power budget and share a common spectrum of N orthogonal tones. The goal of each user is to allocate its power across the N tones in such a way that maximizes the total sum rate that he/she can achieve, while treating the interference of other users and the jammer's signal as additive Gaussian noise. The jammer, on the other hand, wishes...
Finding the power allocations that maximize the sum-rate of a K-user N-tone digital subscriber line (DSL) system is known to be NP-hard. In this paper we devise a polynomial-time algorithm to approximate the maximum sum rate of the system. The development of this algorithm is guided by the fact that, to approach the sumrate maximum, the users should operate in an FDMA-mode over frequency tones where...
Consider a scenario in which K users and a jammer share a common spectrum of N orthogonal tones. Both the users and the jammer have limited power budgets. The goal of each user is to allocate its power across the N tones in such a way that maximizes the total sum rate that he/she can achieve, while treating the interference of other users and the jammer's signal as additive Gaussian noise. The jammer,...
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