DocumentCode :
1356974
Title :
Partial transmit sequences for PAPR reduction of OFDM signals with stochastic optimization techniques
Author :
Chen, Jung-Chieh
Author_Institution :
Dept. of Optoelectron. & Commun. Eng., Nat. Kaohsiung Normal Univ., Kaohsiung, Taiwan
Volume :
56
Issue :
3
fYear :
2010
Firstpage :
1229
Lastpage :
1234
Abstract :
This paper considers the use of the partial transmit sequence (PTS) technique in reducing the peak-to-average power ratio (PAPR) of an orthogonal frequency division multiplexing (OFDM) signal. The conventional PTS technique is highly successful in PAPR reduction for OFDM signals, but the considerable computational complexity for the required search through a high-dimensional vector space is a potential problem for practical implementation. To reduce the search complexity while still improving the PAPR statistics, stochastic optimization techniques such as the simulated annealing (SA) algorithm, Cross-Entropy (CE) method, and particle swarm optimization (PSO) have recently been proposed to search for a phase factor that reduces both the PAPR statistics and the computational load. In this paper, a novel stochastic optimization approach, that is, the electromagnetism-like (EM) algorithm, is applied to reduce the PAPR of an OFDM signal. The computer simulation results show that compared with the various stochastic search techniques developed previously, the proposed EM method obtains the most desirable PAPR reduction with low computational complexity.
Keywords :
OFDM modulation; computational complexity; electromagnetism; particle swarm optimisation; simulated annealing; OFDM signals; PAPR reduction; computational complexity; cross-entropy; electromagnetism; high dimensional vector space; orthogonal frequency division multiplexing; partial transmit sequence; particle swarm optimization; peak-to-average power ratio; simulated annealing; stochastic optimization; stochastic search; Computational complexity; Force; Optimization; Partial transmit sequences; Peak to average power ratio; Orthogonal frequency division multiplexing (OFDM), peak-to-average power ratio (PAPR), partial transmit sequence (PTS), electromagnetism-like (EM) algorithm, stochastic optimization technique;
fLanguage :
English
Journal_Title :
Consumer Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0098-3063
Type :
jour
DOI :
10.1109/TCE.2010.5606251
Filename :
5606251
Link To Document :
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