DS-OFDM雷达通信一体化共享信号性能分析

发布时间：2018-11-13 07:06

【摘要】：为减小电子战武器平台的体积和电磁干扰,更大程度地实现雷达与通信系统的一体化,根据信号能量共享一体化的原则,针对直接信息调制OFDM雷达通信一体化共享信号存在自相关函数旁瓣较高不利于目标检测的问题,提出了一种基于直接扩频的正交频分复用(DS-OFDM)雷达通信共享信号形式。通过分析选取合适的伪随机扩频码对通信数据信息进行直接扩频,提高其自相关性,进而提高共享信号的自相关性能,从而增强目标检测能力。重点分析了共享信号的宽带模糊函数,理论分析表明,所设计的一体化共享信号具有频谱利用率高、低截获概率以及抗干扰性能强等优点。仿真验证的结果表明,选择合适码长的Oppermann序列的DS-OFDM雷达通信共享信号具有近似图钉形的模糊函数,可以达到雷达与通信一体化的要求。
[Abstract]:In order to reduce the volume and electromagnetic interference of electronic warfare weapon platform and realize the integration of radar and communication system to a greater extent, according to the principle of integration of signal energy sharing, In order to solve the problem that the high sidelobe of autocorrelation function is not conducive to target detection, an orthogonal Frequency Division Multiplexing (DS-OFDM) radar communication shared signal based on direct spread spectrum (DSS) is proposed. By analyzing and selecting the appropriate pseudo-random spread spectrum code to spread the communication data directly, the auto-correlation of the communication data information is improved, and the auto-correlation performance of the shared signal is improved, thus the detection ability of the target is enhanced. The wideband ambiguity function of shared signal is analyzed in detail. The theoretical analysis shows that the integrated shared signal has the advantages of high spectrum efficiency, low probability of interception and strong anti-jamming performance. The simulation results show that the DS-OFDM radar communication shared signal with the appropriate code length Oppermann sequence has a similar fuzzy function in the shape of a map nail and can meet the requirements of the integration of radar and communication.
【作者单位】：空军西安飞行学院;
【基金】：国家自然科学基金(61271454)
【分类号】：TN957.51

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