为减小电子战**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。

The sharing signal of radar-communication integration of Orthogonal Frequency Division Multiplexing (OFDM) with direct information modulation has high autocorrelation sidelobe and thus may degrade the target detection performance.To solve the problem,and to reduce the space and electromagnetic interference of weapon platform of electronic war,a signal sharing form of radar-communication integration based on the DS-OFDM modulation is proposed for implementing better integration of radar and communication.By selecting proper pseudo-random spreading code to spread the spectrum directly for communication data,and increase its autocorrelation,the autocorrelation of the sharing signal is increased,and thus can improve the target detection capability.The wideband ambiguity function of the sharing signal is analyzed emphatically.The theoretical analysis indicates that,the integrated signal has high spectrum efficiency,low probability of interception,and a strong anti-interference ability.The simulation results show that the integrated signal has an approximate thumbtack ambiguity function by selecting an appropriate symbol length,which makes it suitable for implementing the integration of radar and communication.