基于正交复合波形设计的宽带雷达共信道干扰消除方法研究

Research on Radar Co-channel Interference Mitigation Base on Orthogonal Waveform Hybrid Design

多部雷达信号间的共信道干扰是目前雷达传感网等面临的电磁兼容问题。适合于窄带雷达运用的传统捷变频与编码分集等方法无法有效解决高分辨宽带雷达其信道干扰问题。文中提出了一种波形与时间双分集的复合设计方法,通过多元码脉冲位置编码、伪随机序列阵脉冲压缩和脉冲积累的复合体制,为较好解决宽带雷达间的共信道干扰提供了一种解决途径。仿真结果表明在共信道信干比大于-30dB的前提下,所提出的设计波形具有明显的干扰抑制能力,计算结果验证了该设计的可行性与高效性。

the co-channel interference between Multi-radar signals is a key problem of the electromagnetic compatibility and interference(EMC/EMI) facing with by radar sensor networks and other multi-radar cooperative systems.Traditional methods of frequency-agile and code-diversity which are suitable for narrow-band radar can not effectively eliminate the co-channel interference among high resolution wideband radars.This paper presents a composite design method of waveform and time diversity.Through the hybrid structure of multiple random pulse position coding,pseudo-random sequence of multi-array pulse compression and pulse accumulation to provide a solution to the co-channel interference among the wideband radar.Simulation results show that the proposed scheme has obviously capability of suppression interference when the ratio of signal to co-channel interference is greater than-30dB.Numerical results also demonstrate the validity and efficiency of the waveform design scheme.