Title :
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
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;
Journal_Title :
Broadcasting, IEEE Transactions on
DOI :
10.1109/TBC.2010.2060174
