CPC H04B 7/0456 (2013.01) [H04L 27/2615 (2013.01); H04L 27/2634 (2013.01); H04L 27/2642 (2013.01); H04L 27/26362 (2021.01)] | 21 Claims |
1. A method for reducing a peak-to-average power ratio (PAPR) of a discrete-time orthogonal frequency division multiplexing (OFDM) signal by selecting a signal with low PAPR from a plurality of candidate discrete-time OFDM signals, the method comprising:
generating a partial update discrete-time OFDM signal by performing a sparse invertible transform operation on a base data symbol sequence; and
linearly combining a base discrete-time OFDM signal and the partial update discrete-time OFDM signal to produce an updated discrete-time OFDM signal, the updated discrete-time OFDM signal being designated as one of the plurality of candidate discrete-time OFDM signals;
wherein the base discrete-time OFDM signal is generated by performing a dense invertible transform operation on the base data symbol sequence or is selected from a previous updated discrete-time OFDM signal.
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