OFDM Peak-to-Average Power Reduction Scheme with Spectral Masking
نویسندگان
چکیده
Clipping and filtering can be a simple and effective method of reducing the peak-to-average power ratio (PAPR) for an orthogonal frequency division multiplexed (OFDM) signal. To be effective the clipping must be performed on an oversampled version of the time domain signal, but this results in out-ofband (OOB) power. It has previously been shown that the OOB signals can be filtered out using a discrete Fourier transform (DFT) based filter. However filtering causes peak regrowth, and an increase in PAPR. In this paper it is shown that if the OOB power is limited rather than completely eliminated much less peak regrowth occurs. Simulation results are presented for HIPERLAN2.
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