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PAPR reduction of OFDM signals using partial transmit sequence: an optimal approach using sphere decoding

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3 Author(s)
Alavi, A. ; Dept. of Electr. & Comput. Eng., Alberta Univ., Edmonton, Alta., Canada ; Tellambura, C. ; Fair, I.

Partial transmit sequence (PTS) is a promising technique for peak-to-average-power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) systems. Computation of optimal PTS weight factors via exhaustive search requires exponential complexity in the number of subblocks; consequently, many suboptimal strategies have been developed to date. In this letter, we introduce an efficient algorithm for computing the optimal PTS weights that has lower complexity than exhaustive search.

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Communications Letters, IEEE  (Volume:9 ,  Issue: 11 )