WLC37-5: On Partial Transmit Sequences to Reduce PAR in OFDM Systems

TitleWLC37-5: On Partial Transmit Sequences to Reduce PAR in OFDM Systems
Publication TypeConference Paper
Year of Publication2006
AuthorsNguyen, T. T., and L. Lampe
Conference NameGlobal Telecommunications Conference, 2006. GLOBECOM '06. IEEE
Pagination1 -6
Date Publishednov.
Keywordscombinatorial mathematics, combinatorial optimization, OFDM modulation, OFDM system, optimisation, orthogonal frequency-division multiplexing, PAR reduction, partial transmit sequences, PTS objective function, search problems, search strategies, SI embedding scheme, transfer side information

This paper takes a fresh look at peak-to-average power ratio (PAR) reduction for orthogonal frequency-division multiplexing (OFDM) using partial transmit sequences (PTS). In particular, the two major drawbacks of PTS, its high complexity when searching for a "good" solution and the need to transfer side information (SI) to the receiver are addressed. Reformulating PTS as a combinatorial optimization (CO) problem enables us to apply various efficient search strategies from the CO literature to PTS. We also incorporate an approximation of the PTS objective function to further reduce the overall complexity. Finally, we propose an implicit SI embedding scheme. This low-complexity scheme requires minimal redundancy and has minimal effect on the overall performance of the OFDM system.


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