针对基于循环前缀的正交频分复用(CP-OFDM)通感一体化波形设计循环前缀抵抗多径干扰,存在能量利用率低、易形成虚假目标等影响雷达性能的问题,文中提出一种基于偏移正交幅度调制(OQAM)的OQAM-OFDM 通感一体化波形设计方法。该方法无需使用循环前缀即可有效抵抗多径干扰,提高能量使用率和频谱利用效率的同时,避免由于循环前缀引入的虚假目标,防止载波间干扰和符号间干扰。为进一步提高通感一体化性能,提出了一种基于Pareto多目标优化的OQAM-OFDM子载波权重系数优化算法,以最大化通信解调输出信噪比和雷达脉冲压缩输出信噪比为目标函数,通过优化设计OQAM-OFDM子载波权重系数,协同提高通感一体化系统整体性能。仿真实验验证了该算法的正确性和有效性。

Cyclic prefix orthogonal frequency division multiplex (CP-OFDM) radar-communication integrated waveform brings problems such as low energy utilization and presence of false targets, which affect radar performance. In response to this issue, this article proposes an integrated waveform design method based on Offset Quadrature Amplitude Modulation OFDM (OQAM-OFDM). It can effectively resist multipath interference without the use of cyclic prefixes, improve energy and spectrum utilization efficiency, and avoid false targets. Moreover, prevent inter carrier interference and inter symbol interference. To further improve the performance of radar-communication integrated system, this paper proposes an OQAM-OFDM subcarrier weight coefficient optimization algorithm based on Pareto multi-objective optimization. The objective function is to maximize the signal-to-noise ratio of communication demodulation output and radar pulse compression output. By optimizing and designing the weight coefficients of each subcarrier in OQAM-OFDM, the overall performance of the integrated system is improved. Simulation experiments have verified the correctness and effectiveness of the algorithm proposed in this paper.

TN957. 51

四川省自然科学基金资助项目(2022NSFSC1952)