基于WFRFT的卫星信号掩盖方法研究

桑之昂; 刘亚南; 刘子威; 胡义鑫; 张更新

doi:10.11999/JEIT200922

基于WFRFT的卫星信号掩盖方法研究

doi: 10.11999/JEIT200922

桑之昂¹,
刘亚南^{2, 3},
刘子威^1, ,,
胡义鑫¹,
张更新¹

1.
南京邮电大学通信与信息工程学院南京 210003
2.
哈尔滨工程大学信息与通信工程学院哈尔滨 150001
3.
中国电波传播研究所青岛 266107

基金项目: 国家自然科学基金(61801445)

详细信息

作者简介:
桑之昂：男，1997年生，博士生，研究方向为卫星通信

刘亚南：男，1987年生，高级工程师，博士生，研究方向为频谱感知与态势呈现、卫星星座频轨协调

刘子威：男，1989年生，讲师，研究方向为卫星通信、信号分离、同频干扰分析

胡义鑫：男，1995年生，硕士生，研究方向为卫星通信

张更新：男，1967年生，教授，研究方向为卫星通信

通讯作者:
刘子威　lzw@njupt.edu.cn

中图分类号: TN927.2
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出版历程
- 收稿日期: 2020-10-28
- 修回日期: 2021-05-22
- 网络出版日期: 2021-07-15
- 刊出日期: 2022-01-10

Research on Satellite Concealment Communication Method Based on WFRFT

1.
College of Telecommunications & Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
2.
College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
3.
China Research Institute of Radio Wave Propagation, Qingdao 266107, China

Funds: The National Natural Science Foundation of China (61801445)

摘要

摘要: 卫星信号掩盖技术利用具有强功率、特定参数特征的信号来掩盖信道中的通信信号，以达到保护信号波形安全的目的。但随着调制识别和串行干扰消除(SIC)技术的发展，采用常规调制方式的掩盖信号能够被非合作接收方破解。针对便携式卫星通信终端的安全通信需求，该文借鉴卫星成对载波多址(PCMA)中利用本地信号副本进行自干扰抵消的思想，分析了一种适用于便携式终端的卫星安全通信方法。同时引入加权类分数傅里叶变换(WFRFT)作为掩盖信号的调制方式，以增加非合作方识别与解调掩盖信号的难度。仿真表明该文所提方法提高了信号传输的安全性，且经过信号分离后系统的误码率损失在可接受范围内，适合实际使用。
- 加权类分数傅里叶变换 /
- 参数估计 /
- 信号分离 /
- 卫星重叠通信
Abstract: Satellite signal concealment technology protects the safety of signal waveform by using signals with high power and specific parameter characteristics. However, with the development of modulation recognition and Successive Interference Cancellation (SIC) technology, the cover signal using conventional modulation methods can be cracked by non-cooperative receivers. In order to meet the safety communication requirements of portable satellite communication terminals, the idea of using local signal copies for self-interference cancellation in Paired Carrier Multiple Access (PCMA) is used for reference. This paper proposes a satellite secure communication method suitable for portable terminals, and introduces Weighted-type FRactional Fourier Transform (WFRFT) as a modulation method to mask the signal, thereby increase the difficulty of non-cooperative parties in identifying and demodulating the cover signal. Simulation shows that the method proposed in this paper improves the security of signal transmission, and the loss of the system's bit error rate is within an acceptable range after signal separation, which is suitable for practical use.
- Weighted-type FRactional Fourier Transform (WFRFT) /
- Parameter estimation /
- Signal separation /
- Satellite overlay communication

HTML全文

图 1 基于WFRFT的卫星信号掩盖通信模型

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图 2 信号分离方法

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图 3 接收信号星座图对比

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图 4 非合作解调掩盖信号的误码率曲线

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图 5 非合作解调通信信号的误码率曲线

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图 6 不同功率差下的误码率性能曲线

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表 1 仿真参数

参数	数值
数据包长	1000 bit
符号速率	32 kBaud
调制方式	QPSK
信道类型	无编码AWGN
采样率	320 kHz
载波频率	100 kHz
频偏	100 Hz
掩信功率差 WFRFT变换阶数	2, 4, 6, 8 dB 1
Monte Carlo次数	1000

下载: 导出CSV

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