Combining of Cyclically Delayed Signals: A Low-Complexity Scheme for PAPR Reduction in OFDM Systems

Author

Wang, Jin Soo ; Lee, Ji Hye ; Park, Jae Cheol ; Song, Iickho ; Kim, Yun Hee

Author_Institution

Dept. of Electron. & Radio Eng., Kyung Hee Univ., Yongin, South Korea

Volume

56

Issue

4

fYear

2010

Firstpage

577

Lastpage

583

Abstract

Based on superposition of signals in the time domain, we propose a new low-complexity scheme for the reduction of the peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. The proposed scheme first generates signal candidates by combining an OFDM signal and its cyclically delayed versions with different delays and phases, and then selects the candidate signal with minimum PAPR. It is shown that the complexity of the proposed scheme is significantly lower than that of the selective mapping (SLM) at the cost of some degradation in the bit error rate (BER) performance and, at similar PAPR and coded BER performance, is lower than that of the low-complexity SLM proposed recently.

Keywords

OFDM modulation; delays; error statistics; BER; OFDM systems; PAPR reduction; bit error rate; cyclically delay signals; orthogonal frequency division multiplexing; peak-to-average power ratio; selective mapping; Bit error rate; Charge coupled devices; Costs; Delay effects; OFDM; Partial transmit sequences; Peak to average power ratio; Performance loss; Radio transmitters; Signal generators; Cyclically delayed signal; linear combining; orthogonal frequency division multiplexing; peak-to-average power ratio;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/TBC.2010.2060174

Filename

5549958