The required power back-off in the uplink of the Evolved UTRA cellular system is considered in this paper. It is shown that the discrete prolate spheroidal window is optimum for the reduction of the peak-to-average ratio by spectrum shaping. It is also useful for reducing the cubic metric. Measures for power back-off and results for required average power are presented for different spectrum shaping functions. It is shown that spectrum shaping with the optimum functions reduces the required power back-off with small increase in the required average power for pi /2-shifted BPSK and low to intermediate data rates.
['Oskar Mauritz', 'Branislav Popovic']
Optimum Family of Spectrum-Shaping Functions for PAPR Reduction of DFT-Spread OFDM Signals