Abstract
This paper treats the problem of crest factor reduction (CFR) for orthogonal frequency division multiplexing (OFDM) signals. The proposed impulse injection method reduces the crest factor of the time-domain signal by injecting judiciously designed complex-valued impulse in selected discrete-time locations while keeping both the in-band error vector magnitude (EVM) and out-of-band spectral emission under control. Numerical examples are provided to demonstrate the effectiveness of the proposed method.
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