多层多参数多项加权分数阶傅里叶变换复合调制通信信号设计方法

杨宇晓; 高萍

doi:10.11999/JEIT220266

多层多参数多项加权分数阶傅里叶变换复合调制通信信号设计方法

doi: 10.11999/JEIT220266

杨宇晓,
高萍^,

南京航空航天大学航天学院南京 211100

基金项目: 国家自然科学基金(61701226)

详细信息

作者简介:
杨宇晓：男，博士，副研究员，研究方向为射频隐身技术、卫星通信等

高萍：女，硕士，研究方向为射频隐身技术、卫星通信等

通讯作者:
高萍　3221606485@qq.com

中图分类号: TN918.91
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- 被引次数: 0
出版历程
- 收稿日期: 2022-03-14
- 修回日期: 2022-09-07
- 网络出版日期: 2022-09-16
- 刊出日期: 2023-04-10

Design Method of Multi-layer Multi-Parameter Multi-term Weighted-type FRactional Fourier Transform Composite Modulation Communication Signal

YANG Yuxiao,
GAO Ping^,

College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China

Funds: The National Natural Science Foundation of China (61701226)

摘要

摘要: 为提高卫星通信信号的安全性能，该文提出一种多层多参数多项加权分数阶傅里叶变换(MWFRFT)复合调制通信信号设计方法。该方法针对传统多项加权分数阶傅里叶变换单层结构的被扫描威胁，将MWFRFT扩展至不同加权系数的多层结构，降低了系统的被扫描概率。同时，多层多参数MWFRFT(MPMWFRFT)系统通过对控制参数集的优化设计，解决了多层结构下的通信信号调制特征模拟。针对复杂电磁环境场景中的目标寄生信号和窄带信号干扰，引入扩频机制，设计了3层多项加权分数阶傅里叶变换和直接序列扩频复合调制系统(TL-MWFRFT-DSSS)。仿真结果表明，该方法在保证较好通信性能的前提下，实现了多层通信信号的调制特征模拟，显著提高了系统的抗扫描性能。
- 安全通信 /
- 多层多参数 /
- 多项加权分数阶傅里叶变换 /
- 扩频
Abstract: In order to improve the safety performance of satellite communication signal, a multi-layer multi-parameter Multi-term Weighted-type FRactional Fourier Transform (MWFRFT) composite modulation communication signal design method is proposed in this paper. Considering the scanning threat of traditional term MWFRFT single-layer structure, MWFRFT is extended to multi-layer structure with different weighting coefficients, which reduces the scanned probability of the system. At the same time, the simulation of communication signal modulation characteristics under multi-layer structure is solved by optimizing the set of control parameters of multi-layer Multi-Parameter MWFRFT (MPMWFRFT) system. Considering the target parasitic signal and narrowband signal interference in complex electromagnetic environment scene, the multi-layer multi-parameter composite modulation system Three Layer Multinomial Weighted FRactional Fourier Transform and Direct Sequence Spread Spectrum (TL-MWFRFT-DSSS) are designed by introducing the spread spectrum mechanism. Simulation results show that this method realizes the simulation of modulation characteristics of multi-layer communication signals on the premise of ensuring good communication performance, and improves significantly the anti scanning performance of the system.
- Secure communication /
- Multi-layer and multi-parameter /
- Multi-term Weighted-type FRactional Fourier Transform (MWFRFT) /
- Spread spectrum

HTML全文

图 1 TL-MWFRFT-DSSS复合调制系统框图

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图 2 原始信号与寄生信号星座图

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图 3 高斯信道下系统误码率曲线

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图 4 叠加寄生信号干扰的复合调制系统误码率曲线

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图 5 叠加窄带干扰信号的复合调制系统误码率曲线

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图 6 采用最优控制参数集的复合调制信号星座图

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图 7 采用随机控制参数集的复合调制信号星座图

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图 8 $ \Delta \alpha = 0.001 $时系统误码率曲线

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图 9 $ \Delta V = 1 $时系统误码率曲线

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图 10 不同状态下的窃听方解调误码率曲线

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图 11 3层MWFRFT系统$ \alpha $抗扫描特性

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图 12 3层MWFRFT系统中参数$ V $抗扫描特性

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表 1 控制参数集

WFRFT项数	最优控制参数集		随机控制参数集
WFRFT项数	$ \alpha $	V	$ \alpha $	V
4-WFRFT	2.001 000 0	(10,4,5,7;5,3,9,1)	0.504 2	(7,7,7,3;8,8,1,3)
6-WFRFT	3.000 496 6	(6,8,2,7,6,6;3,8,8,9,2,10)	5.446 9	(9,8,9,4,3,5;5,9,7,3,4,8)
8-WFRFT	3.999 130 0	(2,3,5,8,1,4,3,7;3,9,1,3,6,6,2,3)	1.680 0	(3,2,5,0,2,5,2,0;2,0,2,0,3,3,1,6)

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