基于OFDM雷达通信共享信号性能分析

为了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,根据信号能量共享的一体化原则,提出了基于OFDM调制的雷达通信一体化共享信号形式.与Baker码编码的OFDM雷达信号宽带模糊函数进行仿真对比,针对发现的问题,通过采用增加子载波个数的方法进行了改进.仿真结果表明,在同等参数条件下,一体化OFDM共享信号比Barker码编码的OFDM雷达信号的自相关性要弱,距离分辨力要低.增加子载波个数后,一体化OFDM信号的自相关性得到了很大提高,基本达到雷达信号探测目标的要求.

Performance Analysis of Radar and Communication Signals Sharing Based on OFDM

To reduce the space and EM interference of electronic war weapon platform, and implement the integration of radar and communication systems to a greater extent, this paper proposes the signal sharing forms of integration of radar and communication based on the OFDM modulation. By contrasting and simulating the wideband fuzzy function of OFDM radar signals coded with Baker codes, it is shown that the signal sharing performance could be improved by using the scheme of increasing the number of sub-carrier, in terms of the problems found. Simulation results indicate that the auto-correlation of the integration OFDM shared signals is weaker than that of the OFDM radar signals coded with Barker code and the former＇ s range resolution is lower than that of the latter, under condition of the same parameters. However, by increasing the number of sub-carder, the auto-correlation of the integration OFDM signals could be improved greatly, thus achieving the goals of radar signal detecting targets.