| 摘要: |
| 调频连续波雷达调频信号的非线性极易导致差频信号的频谱混叠，传统的研究都集中在调频信号非线性的克服或补偿上，但也只能提高较窄带宽范围内的线性，并不能提高雷达的抗干扰性能。基于跳频技术对调频信号进行频率调制，使雷达以跳频方式工作在超大带宽，克服了差频信号频谱混叠造成的影响。理论分析和仿真结果表明，该方法不仅保障了雷达测距测速的有效性，而且极大地提高了雷达的抗干扰性能。 |
| 关键词: 调频连续波雷达 跳频技术 抗干扰性能 超宽带调频 |
| DOI： |
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| 基金项目:2019年第二批教育部产学合作协同育人项目（201902179023）;西安石油大学科技创新基金（134010006） |
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| FMCW radar ultra-wideband frequency modulation anti-jamming method based on frequency hopping technology |
| FENG Jianli |
| (School of Computer Science,Xian Shiyou University,Xian 710065,China) |
| Abstract: |
| The nonlinearity of the frequency modulation(FM) signal of frequency modulation continuous wave(FMCW) radar can easily cause the spectrum aliasing of the difference frequency signal,and the traditional researches have focused on overcoming or compensating the nonlinearity of FM signals,but they can only improve the linearity within a narrow bandwidth range,and cannot improve the radars anti-jamming performance.In this paper,frequency modulation of FM signal is carried out based on frequency hopping(FH) technology,which makes radar work in the mode of FH in ultra-large bandwidth,thus overcoming the influence caused by spectrum aliasing of difference frequency signal.Theoretical analysis and simulation results show that this method not only guarantees the effectiveness of radar ranging and speed measurement,but also greatly improves the radars anti-jamming performance. |
| Key words: FMCW radar frequency hopping anti-jamming performance ultra-wideband frequency modulation |
《电讯技术》编辑部 