Optimization of Pre-equalizer in Multiple Antenna Pre-equalized Time Reversal Secure Transmission System

LEI Wei-jia; ZHANG Wei-han; XIE Xian-zhong; LEI Hong-jiang

doi:10.12263/DZXB.20200585

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Optimization of Pre-equalizer in Multiple Antenna Pre-equalized Time Reversal Secure Transmission System

PAPERS | 更新时间：2025-12-08

- Optimization of Pre-equalizer in Multiple Antenna Pre-equalized Time Reversal Secure Transmission System
- ACTA ELECTRONICA SINICA Vol. 49, Issue 9, Pages: 1736-1745(2021)
- 作者机构：
  
  1.重庆邮电大学通信与信息工程学院, 重庆 400065
  2.移动通信技术重庆市重点实验室, 重庆 400065
  3.重庆邮电大学光电工程学院, 重庆 400065
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20200585
  CLC： TN918
- Received：17 June 2020，
  
  Revised：2021-02-02，
  
  Published：25 September 2021
- 稿件说明：
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雷维嘉,张维翰,谢显中等.多天线预均衡时间反转安全传输系统中预均衡器的优化[J].电子学报,2021,49(09):1736-1745.

LEI Wei-jia,ZHANG Wei-han,XIE Xian-zhong,et al.Optimization of Pre-equalizer in Multiple Antenna Pre-equalized Time Reversal Secure Transmission System[J].ACTA ELECTRONICA SINICA,2021,49(09):1736-1745.
雷维嘉,张维翰,谢显中等.多天线预均衡时间反转安全传输系统中预均衡器的优化[J].电子学报,2021,49(09):1736-1745. DOI： 10.12263/DZXB.20200585.

LEI Wei-jia,ZHANG Wei-han,XIE Xian-zhong,et al.Optimization of Pre-equalizer in Multiple Antenna Pre-equalized Time Reversal Secure Transmission System[J].ACTA ELECTRONICA SINICA,2021,49(09):1736-1745. DOI： 10.12263/DZXB.20200585.

摘要

时间反转传输技术通过利用多径传输实现信号能量在空间和时间上的聚集，具有天然的抗窃听特性.本文在多输入单输出（Mingle-Input Single-Output，MISO）时间反转物理层安全传输系统中，在常规的发送预滤波器前增加一个所有天线共用的预均衡器，并针对保密速率最大化进行优化.相比较联合优化所有预滤波器的方案，优化预均衡器的复杂度明显更低.仿真结果表明，针对安全传输优化的预均衡时间反转系统，在配备4根发送天线、上采样因子为1时高发送功率下的可达保密速率比常规时间反转传输系统约高2倍，且天线数目越多，上采样因子越大，性能优势越明显.

Abstract

By using the multi-path of wireless channels

time reversal (TR) transmission technology can focus the signal energy in a desired spatial and temporal point

so it has natural anti-eavesdropping capability. In this paper

a pre-equalizer shared by all antennas is added in front of the conventional pre-filters at the transmitter for a TR multiple-input single-output system. The optimization of the pre-equalizer is carried out for the maximization of secrecy rate. Compared with the joint optimization for the all pre-filters

the complexity of optimization for the pre-equalizer is significantly lower. The simulation results show that the security rate of the pre-equalized TR system optimized for secure transmission is about two times higher than that of the conventional TR transmission system at high transmission power with four transmitting antennas and one up sampling factor. And the more the number of antennas

the larger the up sampling factor

the more obvious the performance advantage.

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references

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