摘要
采用混沌序列作为基带噪声源,结合正交频分复用(OFDM)体制,提出OFDM混沌噪声多目标干扰技术.分析表明该技术具有优异的频带管理、功率控制以及时频二维遮盖能力,可依据多目标信号的频谱特征,自适应产生干扰信号.本文还针对QPSK和16QAM系统进行了多目标通信干扰仿真,结果表明在相同误码率条件下,OFDM混沌噪声干扰相对于噪声调频瞄准式干扰有3dB左右的功率优势,而相对于噪声调频拦阻式干扰的功率优势超过10dB.因此,OFDM混沌噪声干扰效果更好,十分适用于宽带范围内对多个目标同时干扰的任务.
An OFDM-based chaotic noise multi-target jamming technology is proposed by using the OFDM modulation framework and chaotic sequence as the baseband noise source. Analysis reveals that this technology can be used to generate jamming signals adaptively according to the frequency spectral characteristic of multiple targets, benefiting from its good time-frequency characteristic and controllability in jamming frequency and power spectral density （PSI））. Computer Simulations for multi-target communication jamming at QPSK and 16QAM systems show that OFDM-based chaotic noise jamming achieves power advantage of about 3dB over noise-FM spot jamming, and more than 10dB over noise-FM barrage jamming. As a result, OFDM-based chaotic noise jamming can achieve better jamming effect than traditional noise-FM jamming and is well suitable for multi-target jamming in wide band.
作者
邹时禧
满欣
陈海洋
魏蛟龙
ZOU Shi-xi MAN Xin CHEN Hai-yang WEI Jiao-long(School of electronic information and Communications, Huazhong University of Science ＆ Technology, Wuhan 430074, China College of Electronic Engineering, Naval University of Engineering, Wuhan 430033, China)
出处
《微电子学与计算机》
CSCD
北大核心
2017年第3期5-9,共5页
Microelectronics & Computer
基金
国家自然科学基金项目(61501484)
