| 摘要: |
| 针对传统通信扩频体制在统计学上具有较强的规律性而易被敌方侦测设备发现的缺点，提出了一种抗扩频参数测量的低截获波形方案。从抑制和消除通信信号中存在的可检测、可攻击统计特征的思路出发，通过引入随机过程对跳码扩频序列和码速率进行随机化控制，使输出的码速率和扩频周期时间具有非平稳统计特征和非各态历经性质，以增强低截获波形抗扩频参数测量的能力。仿真结果表明，相比于固定增益定码扩频体制，所提出的低截获波形具备码速率和扩频周期时间测量精度低的特点，且在高信噪比条件下存在较高的相对稳态误差。 |
| 关键词: 通信侦察 扩频参数测量 低截获波形 随机过程 |
| DOI： |
|
| 基金项目: |
|
| Low probability of intercept waveform with rejection capability of spread spectrum parameter measurements |
| SUN Yanbo |
| (Southwest China Institute of Electronic Technology,Chengdu 610036,China) |
| Abstract: |
| For the shortcoming that general spread spectrum(SS) communication structure is easy to be intercepted by the enemy detection equipment due to its statistically regular signal characteristics,a low probability of intercept(LPI) waveform scheme with rejection capability of SS parameter measurements is proposed.From the perspective of eliminating the detectable signal statistical characteristics,the proposed waveform introduces stochastic process to randomly control code hopping SS sequences and SS code rates to endow SS code rate and SS period with nonstationary statistical characteristics,greatly enhancing the rejection capability of LPI waveform in terms of SS parameter measurements.Simulation results indicate that compared with SS communication structure with specific SS sequences,the proposed LPI waveform has the advantages of the low measurement accuracy of SS code rate and SS period,and maintains a quite high relative steadystate error. |
| Key words: communication reconnaissance spread spectrum parameter measurement low probability of intercept stochastic process |
