基于扰码技术降低OFDM系统PAPR的新算法
A new algorithm to reduce PAPR of OFDM system based on scramble technology
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摘要: 针对传统选择映射算法需要额外传输边带信息的不足,提出一种预留子载波-选择映射联合算法:通过对正交频分复用OFDM信号的子载波进行分组,将0幅度预留子载波嵌入到各分组的特定位置后对分组进行位移,由此把边带信息嵌入到预留子载波的位置上,最后选择峰均功率比PAPR最优的一路传输.仿真结果表明,该算法不仅不需要额外传输边带信息,同时有效地降低了OFDM系统的PAPR和复杂度,提高了系统频带利用率.Abstract: Aiming at the problem that the tradition selective mapping (SLM) algorithm needs transmit side information,a new algorithm-reserved subcarriers-SLM algorithm was proposed,which used the technology of grouping for the subcarriers of orthogonal frequency division multiplexing (OFDM) signals.Meanwhile,it inserted side information into the location of reserved subcarriers after shifting the groups by rows,then select the lowest PAPR groups to send.The simulation results showed that the proposed algorithm didn' t need transmit side information,at same time the peak-to-average power ratio(PAPR) and complexity of the system could be effectively reduced,the bandwidth utilization was improved.
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[1]
陈东华.高速移动信道中的OFDM载波频偏估计[J].郑州轻工业学院学报:自然科学版,2012,27(5):99.
-
[2]
Han S H,Lee J H.An overview of peak-to average power ratio reduction techniques for multicarrier transmission[J].IEEE Wireless Communications,2005,12(2):56.
-
[3]
Armstrong J.Peak-to-average power reduction for OFDM by repeated clipping and frequency domain filtering[J].Electronics Letters,2002,38(5):246.
-
[4]
James A D,Jonathan J.Peak-to-mean power control in OFDM,Golay complementary sequences,and reed-muller codes[J].IEEE Transactions on Information Theory,1999,45(7):2397.
-
[5]
Muller S H,Huber J B.A comparison of power reduction schemes for OFDM[C]//Proc IEEE Globecom'97,Phoenix:AZ,1997:1-5.
-
[6]
Wang J,Lee J,Park J,et al.Combining of cyclically delayed signals:A low-complexity scheme for PAPR reduction in OFDM systems[J].IEEE Transmission Broadcast,2010,56(4):577.
-
[7]
Jeon H B,No J S,Shin D J.A low-complexity SLM scheme using additive mapping sequences for PAPR reduction of OFDM signals[J].IEEE Transmission Broadcast,2011,57(4):866.
-
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