摘要
为了提高线性调频连续波(linear frequency modulation continuous wave,LFMCW)雷达的距离分辨力,一方面提出了一种'八段交叉'开环校正法对调频线性度进行校正,另一方面根据基于FFT的LFMCW雷达实际距离分辨力与带宽和频率分辨率的关系,选择2GHz大带宽和4 096点FFT运算,并且计算频率时避开差频信号的不规则区域,截取规则区域内的数据进行运算。仿真和测试实验都表明经过上述处理后的雷达距离分辨力得到一定的改善。
In order to improve the range resolution of （LFMCW） radar, a cross-eight section open-loop method to the relationship among LFMCW radar＇s actual range Linear Frequency Modulation Continuous Wave is proposed to correct the FM linearity. According resolution, bandwidth and frequency resolution, a 2 GHz large bandwidth and 4096-point FFT operation are selected. The irregular region of beat signal is avoided when computing the frequency and the sampling data is intercepted from the regular region. Simulation and experiments show that the above treatments have brought some improvement to the radar＇s range resolution.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第8期139-143,150,共6页
Journal of Chongqing University
基金
中央高校基本科研业务费资助项目(No CDJZR10 16 00 11)
重庆市自然科学基金资助项目(2010BB2049)
