Performance Investigation of MIMO Retroreflective Optical ISAC System for Indoor IoT Scenarios

WANG Weiren; XIA Shengzhe; WANG Haochuan; ZENG Zhihong; LIU Min; CHEN Chen

doi:10.13756/j.gtxyj.2026.250381

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Performance Investigation of MIMO Retroreflective Optical ISAC System for Indoor IoT Scenarios

更新时间：2026-04-20

- Performance Investigation of MIMO Retroreflective Optical ISAC System for Indoor IoT Scenarios
- Study on Optical Communications Issue 2, (2026)
- 作者机构：
  
  1.重庆大学　微电子与通信工程学院，重庆　400030
  2.西南民族大学　电子信息学院，成都　610225
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2026.250381
  CLC： TN929
- Received：15 December 2025，
  
  Revised：2026-02-12，
  
  Published：10 April 2026
- 稿件说明：
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王伟任，夏聖喆，王浩川，等. 面向室内IoT场景的MIMO逆反射光ISAC系统性能研究[J]. 光通信研究，2026(2): 250381.

Wang W R, Xia S Z, Wang H C, et al. Performance Investigation of MIMO Retroreflective Optical ISAC System for Indoor IoT Scenarios[J]. Study on Optical Communications, 2026(2): 250381.
王伟任，夏聖喆，王浩川，等. 面向室内IoT场景的MIMO逆反射光ISAC系统性能研究[J]. 光通信研究，2026(2): 250381. DOI： 10.13756/j.gtxyj.2026.250381.

Wang W R, Xia S Z, Wang H C, et al. Performance Investigation of MIMO Retroreflective Optical ISAC System for Indoor IoT Scenarios[J]. Study on Optical Communications, 2026(2): 250381. DOI： 10.13756/j.gtxyj.2026.250381.

摘要

目的

针对室内物联网（IoT）场景中的信号传输和目标定位等实际需求，文章提出了一种基于多输入多输出（MIMO）架构的逆反射光通感一体化（RO-ISAC）系统。

方法

为了提升MIMO-RO-ISAC系统的整体通信和感知性能，文章首先设计了一种基于正交频分复用（OFDM）和Delta-Sigma调制（DSM）的联合波形，即OFDM-DSM波形。针对MIMO-RO-ISAC系统中由目标位置改变引起的信道状态变化对系统通信和感知性能的影响问题，文章进一步提出了两种空间预均衡（SPE）方法，包括基于通信信道增益的SPE和基于感知信道增益的SPE。

结果

仿真结果表明，OFDM-DSM波形具有比传统OFDM波形更为优越的互相关性能，从而增强了MIMO-RO-ISAC系统的感知性能。同时，OFDM-DSM的引入也能够有效降低MIMO-RO-ISAC系统的通信误码率。另外，基于通信信道增益的SPE能够同时改善MIMO-RO-ISAC系统的通信和感知性能，而基于感知信道增益的SPE仅能提升系统的感知性能。

结论

文章所提OFDM-DSM波形和基于通信信道增益的SPE都能同时显著提升室内IoT场景中MIMO-RO-ISAC系统的通信和感知性能。

Abstract

Objective

To meet the practical demand for signal transmission and target sensing in indoor Internet of Things (IoT) scenarios

a Retroreflective Optical Integrated Sensing and Communication (RO-ISAC) system based on a Multiple-Input Multiple-Output (MIMO) structure is proposed.

Methods

To enhance the overall communication and sensing performance of the MIMO-RO-ISAC system

a unified waveform based on Orthogonal Frequency Division Multiplexing (OFDM) and Delta-Sigma Modulation (DSM)

i. e.

OFDM-DSM waveform

is first designed. Regarding the impact of channel state variations caused by target position changes on the communication and sensing performance of the MIMO-RO-ISAC system

two Spatial Pre-Equalization (SPE) techniques including communication channel gain based SPE and sensing channel gain based SPE are further proposed.

Results

Simulation results show that OFDM-DSM waveform exhibits superior cross-correlation performance compared with conventional OFDM waveform

thereby enhancing the sensing performance of the MIMO-RO-ISAC system. Meanwhile

the introduction of OFDM-DSM modulation can also effectively reduce the communication bit error rate of the MIMO-RO-ISAC system. In addition

the communication channel gain based SPE can improve both the communication and sensing performance of the MIMO-RO-ISAC system

whereas the sensing channel gain based SPE can only enhance the system’s sensing performance.

Conclusion

The proposed OFDM-DSM waveform and communication channel gain based SPE technique can both significantly enhance the communication and sensing performance of the MIMO-RO-ISAC system simultaneously in indoor IoT scenarios.

关键词

Keywords

references

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