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

Author

Alavi, Ali ; Tellambura, Chintha ; Fair, Ivan

Author_Institution

Dept. of Electr. & Comput. Eng., Alberta Univ., Edmonton, Alta., Canada

Volume

9

Issue

11

fYear

2005

Firstpage

982

Lastpage

984

Abstract

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.

Keywords

OFDM modulation; computational complexity; decoding; exponential distribution; sequences; OFDM signal; PAPR reduction; exhaustive search; exponential complexity; optimal PTS weight factor; orthogonal frequency division multiplexing; partial transmit sequence; peak-to-average-power ratio; sphere decoding; Block codes; Decoding; Downlink; Error correction codes; Frequency division multiplexing; Iterative algorithms; Land mobile radio cellular systems; OFDM; Partial transmit sequences; Peak to average power ratio;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2005.11014

Filename

1524586