O-OFDM系统中基于采样点位置分组优化的PTS算法

doi:10.12068/j.issn.1005-3026.2020.07.003

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (7): 927-932.DOI: 10.12068/j.issn.1005-3026.2020.07.003

O-OFDM系统中基于采样点位置分组优化的PTS算法

季策，马福永，张超

(东北大学计算机科学与工程学院，辽宁沈阳110169)

收稿日期:2019-04-08 修回日期:2019-04-08 出版日期:2020-07-15 发布日期:2020-07-15
通讯作者: 季策
作者简介:季策(1969-)，女，辽宁沈阳人，东北大学副教授.
基金资助:
国家自然科学基金资助项目(61673093，61370125); 沈阳市科技计划项目(F16-205-1-01).

PTS Algorithm Based on Sampling Point Position Grouping Optimization in O-OFDM Systems

JI Ce， MA Fu-yong， ZHANG Chao

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

Received:2019-04-08 Revised:2019-04-08 Online:2020-07-15 Published:2020-07-15
Contact: MA Fu-yong
About author:-
Supported by:
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摘要/Abstract

摘要： 针对光正交频分复用(OFDM)系统峰均功率比(PAPR)过高的问题，提出了基于采样点位置分组优化的部分传输序列(SG-PTS)算法.将采样位置按交织分割的方式进行分组，分别对不同位置上的数据单独优化，削弱了不同位置的备选采样点数据使用相同的相位因子序列的限制，有效改善了光正交频分复用系统的峰均功率比性能.仿真结果表明，所提出的算法相比于传统部分传输序列算法，在计算复杂度和误码率性能基本相同的情况下，峰均功率比性能随着采样点位置分组数的增加而改善明显.当子载波数N=256，相位因子数W=2，子块数M=4和M=8，采样点位置分为2组时，峰均功率比性能分别提升0.1dB和0.2dB左右；采样点位置分为4组时，峰均功率比性能可分别改善0.4dB和0.7dB左右.

关键词: 光正交频分复用系统, 峰值功率比, 部分传输序列, 采样点位置, 分组优化

Abstract: Aiming at the problem of high peak-to-average power ratio(PAPR) in optical orthogonal frequency division multiplexing(OFDM) systems， a partial transmission sequence(PTS) based on the optimization of sampling point position grouping(SG-PTS) algorithm was proposed. The sampling position was divided by interleaved segmentation， and the data on different positions were optimized separately， which weakened the limitation of using the same phase factor sequence for alternative sampling point data in different positions. The PAPR performance of optical OFDM system was improved effectively. The simulation results showed that compared with the traditional PTS algorithm， the PAPR performance of the proposed algorithm is significantly improved with the increase of the number of sampling points grouped with the same computational complexity and bit error rate performance. When the number of sub-carrier is N=256， the number of phase factor is W=2， the numbers of sub-blocks are M=4 and M=8， and the sampling points positions are divided into two groups， the PAPR performance is improved by 0.1dB and 0.2dB， respectively. When the sampling points positions are divided into four groups， the PAPR performance can be improved by 0.4dB and 0.7dB，respectively.

Key words: optical orthogonal frequency division multiplexing system, peak-to-average power ratio(PAPR), partial transmission sequence(PTS), sampling point position, grouping optimization

中图分类号:

TP919.3

季策，马福永，张超. O-OFDM系统中基于采样点位置分组优化的PTS算法[J]. 东北大学学报:自然科学版, 2020, 41(7): 927-932.

JI Ce， MA Fu-yong， ZHANG Chao. PTS Algorithm Based on Sampling Point Position Grouping Optimization in O-OFDM Systems[J]. Journal of Northeastern University Natural Science, 2020, 41(7): 927-932.

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O-OFDM系统中基于采样点位置分组优化的PTS算法

PTS Algorithm Based on Sampling Point Position Grouping Optimization in O-OFDM Systems

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[1]	季策，马福永. O-OFDM系统中基于相关性分析的改进PTS算法[J]. 东北大学学报:自然科学版, 2019, 40(6): 801-806.
[2]	沙毅;陈俊鑫;陈进;王光兴;. 一种降低SFBC MIMO-OFDM系统峰均功率比的新算法[J]. 东北大学学报(自然科学版), 2010, 31(4): 503-506.
[3]	高静;汪晋宽;解志斌;. 一种低复杂度的OFDM系统峰均比降低算法[J]. 东北大学学报(自然科学版), 2009, 30(4): 522-525.