Abstract
As a solution to reduce peak-to-mean power ratio (PMPR) in Multicarrier transmission system, it has been proposed that entire part of IDFT block in which envelope-peak amplitude (EPA) is detected is decreased by a appropriate constant. However, this technique loses the spectral efficiency for redundancy of time-waveform shaping consequently. In this paper, we propose a peak-power-suppression (PPS) scheme which achieves band-limitation by filtering the individual sub-channel before multiplexing and reduces average transmit pulse energy at filter input in the same way as the above. The normalized peak factor can be reduced by about 6 dB by applying the PPS scheme that does not significantly degrade BER performance in fading condition. The proposed scheme with adaptive transmit power control is effective for economizing transmit and reducing PMPR.
