TY - JOUR
T1 - PAPR reduction of OFDM signals using cross-entropy-based tone injection schemes
AU - Chen, Jung Chieh
AU - Wen, Chao Kai
N1 - Funding Information:
Manuscript received March 15, 2010; revised May 13, 2010; accepted May 14, 2010. Date of current version June 21, 2010. This work was supported in part by the National Science Council, Taiwan, under Grants NSC 98-2221-E-017-004 and NSC98-2218-E-110-005-MY2. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Vincent K. N. Lau.
PY - 2010
Y1 - 2010
N2 - This letter considers the use of the tone injection (TI) scheme to reduce the peak-to-average power ratio (PAPR) of an orthogonal frequency division multiplexing (OFDM) signal. TI is a distortionless technique that can reduce PAPR significantly without data rate loss and does not require the extra side information. However, the optimal TI scheme requires an exhaustive search over all combinations of possible permutations of the expanded constellation, which is a potential problem for practical applications. To reduce the computational complexity while still improving PAPR statistics, this letter first formulates the PAPR reduction with TI scheme as a particular combinatorial optimization problem. Next, it proposes the application of the cross-entropy (CE) method to solve the problem. Computer simulation results show that the proposed CE method obtains the desired PAPR reduction with low computational complexity.
AB - This letter considers the use of the tone injection (TI) scheme to reduce the peak-to-average power ratio (PAPR) of an orthogonal frequency division multiplexing (OFDM) signal. TI is a distortionless technique that can reduce PAPR significantly without data rate loss and does not require the extra side information. However, the optimal TI scheme requires an exhaustive search over all combinations of possible permutations of the expanded constellation, which is a potential problem for practical applications. To reduce the computational complexity while still improving PAPR statistics, this letter first formulates the PAPR reduction with TI scheme as a particular combinatorial optimization problem. Next, it proposes the application of the cross-entropy (CE) method to solve the problem. Computer simulation results show that the proposed CE method obtains the desired PAPR reduction with low computational complexity.
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U2 - 10.1109/LSP.2010.2051617
DO - 10.1109/LSP.2010.2051617
M3 - Article
AN - SCOPUS:77953983837
SN - 1070-9908
VL - 17
SP - 727
EP - 730
JO - IEEE Signal Processing Letters
JF - IEEE Signal Processing Letters
IS - 8
M1 - 5491391
ER -