| 摘要: |
| 定向通信主副瓣辐射特征固定，当敌方距离较近或位于主瓣方向时存在射频暴露的风险。为此，提出一种辐射特征随机化的定向隐身通信波形，引入阵列副瓣电平准则、目标方向信号特征平稳准则和非目标方向信号特征随机化准则，构造最优阵列集合并从中随机选取导通阵元组合进行定向辐射，在保证合作方向射频信号低失真度的情况下最大化非合作方向失真度，增加敌方平台对副瓣信号的侦收难度。同时引入随机过程对相位调制信号嵌入噪声相位，破环主瓣辐射信号特征，提升主瓣方向射频信号抗识别和解调能力。仿真结果表明，相比于现有定向隐身通信波形，所提波形面对主副瓣方向的敌方侦收平台的被正确识别率为0且解调误符号率约为0.48，同时我方通信解调性能损失小仅0.1 dB。 |
| 关键词: 定向通信 隐身波形 特征随机化 识别性能 解调性能 |
| DOI：10.20079/j.issn.1001-893x.241028002 |
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| 基金项目: |
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| Radio Stealth Directional Communication Waveform Based on Signal Characteristics Randomization |
| SUN Yanbo |
| (Southwest China Institute of Electronic Technology,Chengdu 610036,China) |
| Abstract: |
| Once enemy is near to our platform or locates in the direction of the main lobe,our platform signal faces the risk of radio frequency exposure induced by the specific signal characteristics of directional communication.A radio stealth directional communication waveform based on signal characteristics randomization is proposed.By introduction of sidelobe level criterion,signal characteristics stationarity criterion from target direction,and signal characteristics randomization criterion from non-target direction,several optimal array sets are constructed to randomly select array group for directional communication,contributing to maxizing signal distortion from non-target direction with minimal signal distortion from target direction and greatly enhancing the sidelobe signal interception difficultly of enemy platform.Furthermore,a stochastic process is utilized to insert noise phase into phase modulation signal,destroying mainlobe signal inherent characteristics for the enhancement of mainlobe signal anti-demodulation and anti-recognition ability.Simulation results indicate that the modulation recognition probability and the error symbol rate of proposed radio stealth directional communication waveform based on signal characteristics randomization are 0 and 0.48 respectively facing the enemy platform,while our communication receiving performance loss is only 0.1 dB. |
| Key words: directional communication radio stealth waveform characteristics randomization recognition performance demodulation performance |
《电讯技术》编辑部 