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Existing tone-reservation algorithms (such as the controlled clipper algorithm) for OFDM require a number of iterations to ensure the reduction of Peak-to-Average Power Ratio (PAR). Consequently, such algorithms entail high levels of computational complexity. In this paper, the authors propose a new adaptive-scaling tone reservation algorithm. It utilizes the filtered clipping noise as the PAR reduction signal, and adaptively scales it to reduce the PAR. Simulation results show that their proposed algorithm achieves a better PAR reduction and lower complexity than the controlled clipper algorithm.
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