Improving Range Precision of LFMCW Radar by Spectrums Fusion of Multi-Section Co-Frequency Sinusoids
For improving range precision of Liner Frequency Modulation Continuous Wave (LFMCW) radar, a frequency estimation algorithm based on spectrums fusion of Multi-Section Co-Frequency(MSCF) sinusoids is proposed. To avoid sampling Intermediate Frequency(IF) signals in irregular-areas, IF signals in regular-areas are converted into MSCF sinusoids by an easy discontinuous sampling method. Then Optimization Weighted-Accumulation(OW-A) spectrum is gained through weighted-accumulation spectrums of MSCF sinusoids by the weighted factor. Thirdly, the correlation spectrum is created by correlating OW-A spectrum and the accumulation spectrum of MSCF sinusoids. Consequently, exact frequency estimation of IF signals in regular-areas can be obtained through spectral peak searching of the correlation spectrum, and high precision range of LFMCW radar can be achieved. Simulation results demonstrate that frequency estimation Root Mean Square Error(RMSE) of the proposed algorithm is about 1/5 times as same as that of FFT+CZT method; the range precision of LFMCW radar based on the proposed algorithm can be below 1mm.
spectrums fusion frequency estimation Multi-Section Co-Frequency(MSCF) sinusoids Liner Frequency Modulation Continuous Wave (LFMCW) radar high precision range
XIAO Wei TU Yaqing SHEN Yanlin ZHAN Qidong ZHANG Lei
Department of Logistical Information Engineering, Logistical Engineering University, Chongqing, 4013 Zhuozhou Comprehensive Storehouse, Hebei, 072700, China
国际会议
The 31st Chinese Control Conference(第三十一届中国控制会议)
合肥
英文
3629-3634
2012-07-01（万方平台首次上网日期，不代表论文的发表时间）