Low-complexity PTS scheme based on phase factor sequences optimization

doi:10.21629/JSEE.2018.04.05

Journal of Systems Engineering and Electronics ›› 2018, Vol. 29 ›› Issue (4): 707-713.doi: 10.21629/JSEE.2018.04.05

• Electronics Technology • Previous Articles Next Articles

Low-complexity PTS scheme based on phase factor sequences optimization

Ce JI(), Chao ZHANG*(), Wenjing ZHU()

School of Computer Science & Engineering, Northeastern University, Shenyang 110169, China

Received:2017-05-02 Online:2018-08-01 Published:2018-08-30
Contact: Chao ZHANG E-mail:jice@ise.neu.edu.cn;798245298@qq.com;824085792@qq.com
About author:JI Ce was born in 1969. She received her Master degree from Northeastern University, in 1997, and her Ph.D. degree from Northeastern University, in 2005. Now she is an associate professor in the Northeastern University. Her research interests are blind information processing and the key technology of OFDM. E-mail: jice@ise.neu.edu.cn|ZHANG Chao was born in 1992. He received his Bachelor degree in communication engineering from Hainan University in 2014. He is a Master degree candidate in Northeastern University. His research interest is the key technology of OFDM. E-mail: 798245298@qq.com|ZHU Wenjing was born in 1994. She received her Bachelor degree in communication engineering from Civil Aviation University of China in 2016. She is a Master degree candidate in Northeastern University. Her research interest is the key technology of OFDM. E-mail: 824085792@qq.com
Supported by:
the National Natural Science Foundation of China(61673093);the National Natural Science Foundation of China(61370152);the Science and Technology Project of Shenyang(F16-205-1-01);This work was supported by the National Natural Science Foundation of China (61673093; 61370152) and the Science and Technology Project of Shenyang (F16-205-1-01)

Abstract

Abstract:

In this paper, a new partial transmit sequence (PTS) scheme with low computational complexity is proposed for the problems of high computational complexity in the conventional PTS method. By analyzing the relationship of candidate sequences in the PTS method under the interleaved partition method, it has been discovered that some candidate sequences generated by phase factor sequences have the same peak average power ratio (PAPR). Hence, phase factor sequences can be optimized to reduce their searching times. Then, the computational process of generating candidate sequences can be simplified by improving the utilization of data and minimizing the calculations of complex multiplication. The performance analysis shows that, compared with the conventional PTS scheme, the proposed approach significantly decreases the computational complexity and has no loss of PAPR performance.

Key words: partial transmit sequence (PTS), peak average power ratio (PAPR), phase factor sequences optimization, orthogonal frequency division multiplexing (OFDM), low computational complexity

Ce JI, Chao ZHANG, Wenjing ZHU. Low-complexity PTS scheme based on phase factor sequences optimization[J]. Journal of Systems Engineering and Electronics, 2018, 29(4): 707-713.

Figures/Tables 6

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References 28

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Method	$V$ =4, $W$ =4		$V$ =8, $W$ =4
Method	Number ofcomplexmultiplication	Number ofcomplexaddition		Number ofcomplexmultiplication	Number ofcomplexaddition
Conventional PTS	24 576	24 576		14 680 064	14 680 064
Reference [19]	3 712	10 752		531 712	2 118 656
Improved PTS	1 024	2 688		3 072	699 008

Method	$V$ =4, $W$ =4		$V$ =8, $W$ =4
Method	Complexmultiplication	Complexaddition		Complexmultiplication	Complexaddition
Reference [19]	89.896%	56.250%		96.378%	85.568%
Improved PTS	95.833%	89.063%		99.979%	95.238%

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Low-complexity PTS scheme based on phase factor sequences optimization

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