摘要
由于现有的低截获通信波形通常采用单一调制方式,其信号特征固定,存在易被敌方侦收识别的缺点,提出一种基于随机化调制的射频隐身波形。考虑到高功率放大器的非线性失真效应,上述波形将BPSK、OQPSK、8PSK和MSK作为恒包络调制集合,根据混沌序列产生的调制图案对信息序列进行随机化调制,其输出波形不存在固定可检测的信号特征,以降低通信调制的识别率,增强射频隐身波形抗识别的能力。仿真结果表明:相比于传统单一恒包络调制,基于随机化调制的射频隐身波形具备识别率低的特点,在高信噪比下其识别率低于20%,呈现出优越的低截获性。
Since the modern low probability of intercept communication waveforms generally employ single modulation, prone to be intercepted and identified induced by the inherent signal characteristic, a novel radio frequency(RF) stealth waveform based on randomized modulations is proposed in this paper. In views of the nonlinear distortion from high power amplifiers, the proposed waveform took BPSK, OQPSK, 8 PSK and MSK as the constant envelope modulation set, and the information sequence was modulated randomly using a modulation pattern generated from chaos sequences, thus a fixed detectable signal characteristic hardly exists in the proposed waveform, which greatly decreases the modulation recognition rate and enhances the robustness against signal sorting and identification. Simulation results indicate that compared with general single constant envelope modulation, the RF stealth waveform based on randomized modulations has the advantage of the low modulation recognition rate, less than 20% at high signal to noise ratio(SNR), and offers superior low probability of intercept performance.
作者
孙岩博
王亚涛
黄小艳
SUN Yan-bo;WANG Ya-tao;HUANG Xiao-yan(Southwest China Institute of Electronic Technology,Chengdu Sichuan 610036,China)
出处
《计算机仿真》
北大核心
2020年第10期1-5,13,共6页
Computer Simulation
基金
“十三五”装备预先研究项目(41408020101,41408020103,41408050201)。
关键词
射频隐身
随机化调制
信号特征
识别性能
RF stealth
Randomized modulations
Signal characteristic
Recognition performance
作者简介
孙岩博(1990-),男(汉族),黑龙江省齐齐哈尔市人,博士,现为工程师,主要研究领域为低截获通信技术;王亚涛(1981-),男(汉族),四川省自贡市人,硕士,现为高级工程师,主要研究领域为无源定位、射频隐身;黄小艳(1992-),女(汉族),云南省昭通市人,硕士研究生,主要研究方向为低截获通信技术。
