A Step-by-step Optimal Signal Mapping Method for O-OFDM Index Modulation

WANG Huiqin; ZHI Feng; CHEN Dan; CAO Minghua; BAO Zhongxian; DUAN Yunpeng

doi:10.13756/j.gtxyj.2024.230007

您当前的位置：

首页 >

文章列表页 >

A Step-by-step Optimal Signal Mapping Method for O-OFDM Index Modulation

更新时间：2024-08-05

- A Step-by-step Optimal Signal Mapping Method for O-OFDM Index Modulation
- Study on Optical Communications Issue 4, Pages: 23000701-23000706(2024)
- 作者机构：
  
  1.兰州理工大学　计算机与通信学院，兰州　730050
  2.西安理工大学　自动化与信息工程学院，西安　710048
  3.中国联合网络通信有限公司　甘肃省分公司，兰州　730050
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2024.230007
  CLC： TN929.1
- Published：10 August 2024，
  
  Received：11 March 2023，
  
  Revised：23 April 2023，
- 稿件说明：
扫描看全文
王惠琴，支凤，陈丹，等. O-OFDM索引调制的分步优化信号映射方法[J]. 光通信研究，2024(4)：230007.

Wang H Q, Zhi F, Chen D, et al. A Step-by-step Optimal Signal Mapping Method for O-OFDM Index Modulation [J]. Study on Optical Communications, 2024(4)：230007.
王惠琴，支凤，陈丹，等. O-OFDM索引调制的分步优化信号映射方法[J]. 光通信研究，2024(4)：230007. DOI： 10.13756/j.gtxyj.2024.230007.

Wang H Q, Zhi F, Chen D, et al. A Step-by-step Optimal Signal Mapping Method for O-OFDM Index Modulation [J]. Study on Optical Communications, 2024(4)：230007. DOI： 10.13756/j.gtxyj.2024.230007.

摘要

【目的】

采用随机映射以及传统星座图会导致已有光正交频分复用（O-OFDM）－索引调制（IM）系统的误码率（BER）性能无法达到最优，因此，文章基于激活子载波的最优选择以及星座图的最优旋转提出了一种分步优化信号映射方法，旨在通过分步优化信号映射方法实现O-OFDM-IM系统BER性能的改善。

【方法】

在发射端，首先依据信道状态信息，采用信道范数最大化准则选择最优

激活子载波组合；其次，利用信道状态信息，以

∂

=0.5°为步长，采用穷举搜索算法得到最优星座图；之后，将通过旋转获得的最优星座图加载到激活的子载波上进行信号传输；最后在接收端利用最大似然（ML）检测算法对原始信号进行恢复来实现最小的系统错误概率。

【结果】

仿真表明，在强湍流、

BER

=10

－4

和调制阶数为16的条件下，采用文章所提方法后，（4，2）O-OFDM-IM系统的信噪比（SNR）降低了约1.45 dB。此外，随着湍流强度的增大，BER性能的改善更明显。如，8正交幅度（QAM）、

BER

=10

－4

时，（4，2）O-OFDM-IM系统的SNR在强湍流下降低了约1.35 dB，在弱湍流下则降低了1.2 dB。

【结论】

由仿真结果可知，在已知信道状态信息的前提下，文章所提方法可有效改善湍流信道下系统的BER性能。

Abstract

【Objective】

The use of random mapping and traditional constellations in Optical-Orthogonal Frequency Division Multiplexing (O-OFDM) - Index Modulation (IM) system cannot reach the optimal Bit Error Rate (BER) performance. Therefore

a step-by-step optimal signal mapping method is proposed based on the optimal selection of active sub-carriers and the optimal rotation of constellation to improve the BER performance of O-OFDM-IM system.

【Methods】

At the transmitter side

the method firstly selects the optimal combination of active subcarriers based on the channel state information and the channel norm maximization criterion. Then considering

∂

=0.5° as the step size

an exhaustive search algorithm is used to obtain the optimal constellation by using the channel state information. Next

the optimal constellation graph obtained by rotation is loaded on the active sub-carrier for signal transmission. At last

the Maximum Likelihood (ML) detection algorithm is used to recover the original signal at the receiver to minimize the system error probability.

【Results】

The results show that at the condition of

BER

=10

-4

and strong turbulence

the Signal to Noise Ratio (SNR) is improved by about 1.45 dB when the modulation order is 16 in (4

2) system. In addition

with the increase of turbulence intensity

the improvement of BER performance

is more obvious. For example

when the

BER

=10

-4

the SNR of the (4

2) system at 8 Quadrature Amplitude Modulation (QAM) is improved by about 1.35 dB in strong turbulence and 1.2 dB in weak turbulence.

【Conclusion】

Based on the known channel state information

a step-by-step optimal signal mapping method for O-OFDM-IM is proposed in this paper

which can effectively improve the BER performance of the system in strong turbulence channels.

关键词

索引调制载波优化星座设计误码率

Keywords

IMcarrier optimizationconstellation designBER

references

Abu-Alhiga R, Haas H. Subcarrier-index Modulation OFDM[C]//2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications. Tokyo, Japan: IEEE, 2009: 5449882.

Başar E, AygölüÜ , Panaylrcl E, et al. Orthogonal Frequency Division Multiplexing with Index Modulation[J]. IEEE Transactions on Signal Processing, 2013, 61(22):5536-5549.

Choi K. Waveform Design for 5G and Beyond Systems[J]. Electronics, 2021, 10(17):10172124.

Başar E, Panaylrcl E. Optical OFDM with Index Modulation for Visible Light Communications[C]//2015 4th International Workshop on Optical Wireless Communications (IWOW). Istanbul, Turkey: IEEE, 2015: 7342256.

柯熙政, 王超珍. 部分相干离轴涡旋光束在大气湍流中的光强分布[J]. 光学学报, 2017, 37(1):0101005.

Ke X Z, Wang C Z. Intensity Distribution of Partially Coherent Off-Axis Vortex Beam Propagating in Atmospheric Turbulence[J]. Acta Optical Sinica, 2017, 37(1):0101005.

Le-Tran M, Kim S. Deep Learning-assisted Index Estimator for Generalized LED Index Modulation OFDM in Visible Light Communication [J]. Photonics, 2021, 8(5):8050168.

Yesilkaya A, Basar E, Miramirkhani F, et al. Optical MIMO-OFDM with Generalized LED Index Modulation[J]. IEEE Transactions on Communications, 2017, 65(8):3429-3441.

Xiao Y, Wang S S, Dan L L, et al. OFDM with Interleaved Subcarrier-index Modulation[J]. IEEE Communications Letters, 2014, 18(8):1447-1450.

Ma Q L, Xiao Y, Dan L L, et al. Subcarrier Allocation for OFDM with Index Modulation[J]. IEEE Communications Letters, 2016, 20(7):1469-1472.

豆红霞. 无线光通信中的索引调制非对称限幅光OFDM技术[D]. 兰州: 兰州理工大学, 2021.

Dou H X. Asymmetrically Clipped Optical OFDM with Index Modulation for Wireless Optical Communication [D]. Lanzhou, China: Lanzhou University of Technology, 2021.

Sridhar S, Latha S, Thakre A. Constellation Design for Dual-mode OFDM-IM[C]//2020 Fourth International Conference on Computing Methodologies and Communication (ICCMC). Erode, India: IEEE, 2020: 000150.

Basar E. Orbital Angular Momentum with Index Modulation [J]. IEEE Transactions on Wireless Communications, 2018, 17(3):2029-2037.

Barrios R, Dios F. Exponentiated Weibull Model for the Irradiance Probability Density Function of a Laser Beam Propagating through Atmospheric Turbulence [J]. Optics & Laser Technology, 2013, 45:13-20.

Views

下载量

CSCD

CNKI被引量

Alert me when the article has been cited

提交

Tools

Publicity Resources

Performance Analysis of MIMO-FSO System based on Quadrature Amplitude Modulation

A Free Space Optical Communication System using Manchester Encoded Signals for Communication Applications between Islands on the Ocean

Study on LED Visible Light Communication based on Wavelength Division Multiplexing Technology

Performance Analysis of Visible Light Communication System Employing Carrierless Amplitude and Phase Modulation

Effects of interferences on MIMO visible light communication system performances

Related Author

LI Pu

TANG Xuan

XU Jing

CHEN Yang

YANG Jie

SHAO Yu-feng

WANG An-rong

WANG Zhuang

Related Institution

School of Communication and Electronic Engineering, East China Normal University

College of Electronic and Information Engineering, Chongqing Three Gorges University

Research Institute of Photonics,Dalian Polytechnic University

Information Science Technology College,Dalian Maritime University

State Key Laboratory of Mobile Communication,Southeast Univ

Postal code：430205
Technical support is provided by Beijing Founder electronics co., LTD 鄂ICP备2022010197 鄂公网安备 42011202002092号
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
Total Visits：93117 Visits Today：204

⁰