基于IRS辅助的OFDM-IM系统设计

赵萌萌; 何立明; 刘芳芳

doi:10.11959/j.issn.1000-0801.2023136

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基于IRS辅助的OFDM-IM系统设计

研究与开发 | 更新时间：2024-06-05

- 基于IRS辅助的OFDM-IM系统设计
- Design of OFDM-IM system based on IRS-assisted
- 电信科学 2023年39卷第7期页码：59-67
- 作者机构：
- 作者简介：
  
  [ "赵萌萌（1999- ），女，长安大学信息工程学院硕士生，主要研究方向为智能反射面辅助无线通信" ]
  [ "何立明（1978- ），男，博士，长安大学信息工程学院副教授，主要研究方向为智能交通系统信息采集及融合" ]
  [ "刘芳芳（1997- ），女，长安大学信息工程学院硕士生，主要研究方向为深度学习轨迹预测" ]
- 基金信息：
  
  国家自然科学基金资助项目;The National Natural Science Foundation of China(51308058)
- DOI：10.11959/j.issn.1000-0801.2023136
  中图分类号： TN929
- 网络出版日期：2023-07，
  
  纸质出版日期：2023-07-20
- 稿件说明：
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赵萌萌, 何立明, 刘芳芳. 基于IRS辅助的OFDM-IM系统设计[J]. 电信科学, 2023,39(7):59-67.

Mengmeng ZHAO, Liming HE, Fangfang LIU. Design of OFDM-IM system based on IRS-assisted[J]. Telecommunications science, 2023, 39(7): 59-67.
赵萌萌, 何立明, 刘芳芳. 基于IRS辅助的OFDM-IM系统设计[J]. 电信科学, 2023,39(7):59-67. DOI： 10.11959/j.issn.1000-0801.2023136.

Mengmeng ZHAO, Liming HE, Fangfang LIU. Design of OFDM-IM system based on IRS-assisted[J]. Telecommunications science, 2023, 39(7): 59-67. DOI： 10.11959/j.issn.1000-0801.2023136.

摘要

索引调制（index modulation，IM）和智能反射面（intelligent reflecting surface，IRS）是新兴的移动通信技术。为了提高传统正交频分复用（orthogonal frequency division multiplexing，OFDM）系统的可靠性，设计一种基于 IRS 的索引调制正交频分复用（orthogonal frequency division multiplexing-index modulation， OFDM-IM）系统。首先，使用空间调制和频域调制设计OFDM-IM系统，增大子载波间的欧几里得距离。其次，通过建立等效电路模型，设计实用的IRS模型。最后，使用交替优化算法联合优化接入点（access point， AP）的主动发射功率和IRS处的被动波束形成。仿真结果表明，基于IRS辅助的OFDM-IM系统与基准方案相比，其误符号率（symbol error rate，SER）或误码率（bit error rate，BER）可以降低60%～90%，在较高信噪比情况下，系统SER或BER可达到1.0×10

-6

，这说明IM和IRS技术的引入优化了端到端通信系统的链路传输质量。此外，以基于IRS辅助的OFDM-IM系统为标准，仿真结果证明了IRS模型和IM中各参数对系统的影响，并得出了系统中各模型参数要根据信道状态信息（channel state information，CSI）合理选择的结论。

Abstract

Index modulation (IM) and intelligent reflecting surface (IRS) are emerging mobile communication technologies.In order to improve the reliability of traditional orthogonal frequency division multiplexing (OFDM) system

an orthogonal frequency division multiplexing with index modulation (OFDM-IM) system based on IRS-assisted was designed.Firstly

the OFDM-IM system was designed by using spatial modulation and frequency domain modulation to increase the Euclidean distance betwe

en subcarriers.Then

by establishing an equivalent circuit model

a practical IRS model was obtained.Finally

an alternating optimization algorithm was used to optimize the active transmission power of the access point (AP) and passive beamforming of the IRS jointly.The simulation results show that compared to the benchmark scheme

the symbol error rate (SER) or bit error rate (BER) of the OFDM-IM system based on IRS-assisted can be reduced by 60%～90%.Especially in the case of high signal-to-noise ratio

the SER or BER of the system can reach 1.0×10

-6

which indicates that the introduction of IM and IRS technologies has optimized the link transmission quality of end-to-end communication system.In addition

based on the IRS-assisted OFDM-IM system as the standard

simulations are conducted to demonstrate the impact of various parameters from the IRS model and IM.It concludes that the parameters in the system should be selected reasonably according to channel state information (CSI).

关键词

Keywords

references

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