首页|基于FBMC-chirp的低截获探通一体化信号设计

基于FBMC-chirp的低截获探通一体化信号设计

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面对快速发展的先进无源侦察技术,一体化信号除需具备较优的雷达探测和无线通信能力,还需满足抗截获和防窃听的需求,以提高一体化系统的生存能力和作战性能.多载波探通一体化信号的低截获设计已成为目前一体化信号研究的重要问题.针对传统低截获多载波探通一体化信号雷达分辨性能受限且未能同时兼顾通信有效性和可靠性要求的问题,本文在子载波复用的一体化多维信号框架下,研究了一种雷达和通信性能最小损失的低截获多载波探通一体化信号设计方法.首先,从提升时频资源利用率的角度,设计了一种基于滤波器组多载波技术的通信频谱分块功率优化和雷达梳状谱等功率优化的低截获多载波探通一体化信号时频结构.该结构通过分块的方式降低了通信信号的峰均比,提升了通信信号的低截获性能.然后在此基础上,以雷达互信息和通信信道容量为约束条件,以最小化信号总功率为优化目标,建立了雷达子载波功率和通信分块子载波功率联合优化模型.本文将该优化模型转化成一个凸二次规划问题,并采用信赖域方法对该优化问题进行求解.实验结果表明,本文所设计的低截获多载波探通一体化信号不仅具有较优的雷达探测和分辨性能,以及较好的无线通信性能,而且具有较优的低截获性能.
LPI Joint Radar and Communication Signal Design Based on FBMC-chirp
As advanced passive reconnaissance technology develops rapidly,joint radar and communication signal in multicarrier communication not only requires better radar detection and wireless communication capabilities but must also satisfy the requirements of anti-interception and anti-eavesdropping to improve the survivability and combat perfor-mance of the integrated system.The low probability of intercept(LPI)performance of joint radar and communication sig-nals in multicarrier communication has become an important challenge in the research of integrated signals.To address the problems of traditional joint radar and communication signal in multicarrier communication,such as the limited radar reso-lution performance and the requirements of communication effectiveness and reliability not being simultaneously consid-ered in the design,we study a design method of LPI joint radar and communication signal in multicarrier communication with a minimum loss of the performance of radar and communication under the integrated multidimensional signal frame-work of subcarrier multiplexing.First,from the perspective of improving the utilization of time-frequency resources,a time-frequency structure of LPI joint radar and communication signal in multicarrier communication is designed based on filter-bank multicarrier(FBMC)technology,which optimizes the power of the communication spectrum block and radar spectrum,respectively.The structure of the communication subcarrier is divided into multiple blocks to reduce the peak-to-average power ratio(PAPR)of the communication signal and improve the LPI performance of the communication subcar-rier part.Based on this,the joint optimization model of radar subcarrier power and communication block subcarrier power is established by utilizing the performance metrics of the radar mutual information and the communication channel capacity as the optimization constraints and minimizing the total power of the integrated signal as the optimization objective.In this paper,the optimization model is transformed into a convex quadratic programming problem,and the method of trust re-gion is used to solve the optimization problem effectively.Finally,the results of an experiment show that the designed LPI joint radar and communication signal in multicarrier communication has the ideal performance of radar detection and reso-lution,better wireless communication performance,and good LPI performance.

low probability of interceptjoint radar and communicationchannel capacitymutual informationam-biguity function

陈军、贺晓波、汪飞、王杰

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南京信息工程大学电子与信息工程学院,江苏南京 210044

南京航空航天大学雷达成像与微波光子技术教育部重点实验室,江苏南京 210016

低截获概率 雷达通信一体化 信道容量 互信息 模糊函数

国家自然科学基金江苏省自然科学基金航空科学基金航空科学基金雷达成像与微波光子技术教育部重点实验室基金(南京航空航天大学)

62171229BK201907722020002005200520200020052002NJ20230002

2024

10.16798/j.issn.1003-0530.2024.07.005

信号处理
中国电子学会

信号处理

CSTPCD北大核心
影响因子：1.502
ISSN：1003-0530
年,卷(期)：2024.40(7)