中文摘要：

卫星抗干扰通信系统中，采用相干快速跳频信号能有效提高信号抗转发式干扰和抗截获能力。由于电离层色散的存在，快跳频信号捕获时需要搜索电离层TEC值以消除电离层传播延迟。地面站采用全球电离层垂直电子总数（VTEC）网格信息辅助跳频信号捕获，利用卫星仰角信息得到传播路径上TEC值及各频点传播延迟，据此调整各频点内积分结果实现多频点相干积分，降低捕获搜索维度。推导出电离层VTEC网格精度误差导致的捕获能量损失，克服了电离层色散对相干BPSK跳频信号相干累积的影响，分析了本算法相对搜索TEC算法的简化效益，研究结果对不同频带的卫星跳频信号同步具有参考价值。

英文摘要：

Coherent fast frequency hopping （FFH） spread spectrum signals effectively improve the ability to fend off forward- ing jamming and interception of a satellite anti jamming communication system. However the acquisition of FFH signal was in- fluenced by the frequency-selective ionosphere delays. It used the global ionosphere map of vertical total electron content （VTEC） to aid the acquisition. And modelled the ionosphere delays as functions of VTEC and elevation angles, adjusted and accumulated the integrals of different hops accordingly thus the acquisition complexity was reduced. It calculated the energy loss caused by VTEC error and analyzed the complexity reduction of this algorithm versus TEC searching algorithm. This re- search is valuable to the synchronization of satellite FFH signal on different radio bands.