魏晓会,谢锡海

• 1:西安邮电大学通信与信息工程学院

摘要(Abstract)：

为了提高FMCW雷达的测距精度,提出一种将SDFT结合二分法来提高峰值频率点的搜索方法。该方法克服了传统FFT固有采样间隔导致的测距误差问题,首先利用FFT处理将谱峰值限定在两个频点之间,然后采用二分法和SDFT逐步搜索峰值,在不增加太大计算量的条件下进一步提高差频信号的谱分析精度,进而提高了测距精度。最后通过仿真分析验证了该方法的有效性,满足了高精度测距的实际需要。

关键词(KeyWords)： 频率估计;二分法;SDFT;FMCW雷达;差频信号;测距方法

Abstract:

Keywords:

基金项目(Foundation): 国家科技攻关计划(2014K05-20)~~

作者(Author): 魏晓会,谢锡海

DOI: 10.16652/j.issn.1004-373x.2018.07.003

参考文献(References)：

• [1]鲁晓帆.FMCW测距雷达设计与实现[D].南京:南京航空航天大学,2012.LU Xiaofan.Design and implementation of FMCW range-finding radar[D].Nanjing:NUAA,2012.
• [2]STOVE A G.Linear FMCW radar techniques[J].IEE proceedings of radar&signal processing,1992,139(5):343-350.
• [3]MCGREGOR J A,POULTER E M,SMITH M J.Switching system for single antenna operation of an S-band FMCW radar[J].IEE proceedings of radar sonar and navigation,1994,141(4):241-248.
• [4]BURROWS G D.An assessment of a FMICW ground-wave radar system for ocean wave studies[J].International journal of remote sensing,1985,6(1):275-282.
• [5]赵爽.汽车毫米波防撞雷达的研究与实现[D].长春:长春理工大学,2013.ZHAO Shuang.Design and implementation of MMW anticollision radar for automobile[D].Changchun:Changchun University of Technology,2013.
• [6]李天昀,葛临东.两种快速频域细化分析方法的研究[J].系统工程与电子技术,2004,26(9):1192-1194.LI Tianyun,GE Lindong.Research of two kinds of fast zoom spectrum[J].Systems engineering and electronics,2004,26(9):1192-1194.
• [7]罗建,肖妮.用SDFT实现FSK调制信号的数字解调方法[J].无线通信技术,2007,16(1):60-62.LUO Jian,XIAO Ni.Study of the method of SDFT demodulation for the FSK signal[J].Wireless communication technology,2007,16(1):60-62.
• [8]YAROSLAVSKII L P.Shifted discrete Fourier transforms[J].Problems of information transmission,1980,15:102-105.
• [9]丁康.离散频谱分析校正理论与技术[M].北京:科学出版社,2008.DING Kang.The principle and technology of discrete spectrum correction[M].Beijing:Science Press,2008.
• [10]崔刚,李涛.一种基于二分法的LFM调制斜率估计算法[J].电子科技,2015,28(10):15-17.CUI Gang,LI Tao.An estimation algorithm based on the dichotomy of LFM modulation slope[J].Electronic science and technology,2015,28(10):15-17.