Infrared and Laser Engineering, Volume. 51, Issue 12, 20220222(2022)
Design and hardware implementation of modified Rife algorithm for FMCW LiDAR
Figures & Tables(8)
Fig. 1. (a) Time frequency domain diagram of transmitted signal and received echo signal under the trapezoidal modulation; (b) Time frequency domain diagram of the beat signal after coherent detection; (c) Time domain waveform of the received beat signal
Fig. 2. Comparison of four algorithms for standard deviation of frequency estimation with CRLB
Fig. 4. Distribution diagram of two algorithms absolute frequency error
Table 1. Calculation comparison of four algorithms based on
N -point FFTView tableView in ArticleTable 1. Calculation comparison of four algorithms based on
N -point FFTAlgorithm Complex multiplication Division Addition Rife 0 1 2 Z-Rife 2 1 4 A-P-Rife[ 10 ]5 3 14 I-Rife[ 9 ]4N 1 4N+4
Table 2. Frequency error of different algorithms
View tableView in ArticleTable 2. Frequency error of different algorithms
Algorithm RMSE/Hz ME/Hz Rife 37258 35598 Z-Rife 18371 10821
Table 3. Experimental results
View tableView in ArticleTable 3. Experimental results
L /m V /km·h−1 L’ /m V’ /km·h−1 L_error /m V_error /km·h−1 1 10 0.98 9.98 0.02 0.02 5 20 4.98 19.97 0.02 0.03 20 30 20.01 29.84 0.01 0.16 20 60 19.99 60.04 0.01 0.04 20 90 20.04 90.00 0.04 0.00 50 30 50.04 29.99 0.04 0.01 50 90 50.00 90.01 0.00 0.01 50 120 50.02 120.01 0.02 0.01 80 30 80.03 29.87 0.03 0.13 80 90 80.05 89.98 0.05 0.02 80 140 80.04 140.01 0.04 0.01 112 30 112.04 29.99 0.04 0.01 112 90 112.02 89.95 0.02 0.05 112 140 120.05 139.85 0.05 0.15
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Mao Ye, Hengquan Liu, Yiqiang Zhao, Zewen Sun, Bin Hu. Design and hardware implementation of modified Rife algorithm for FMCW LiDAR[J]. Infrared and Laser Engineering, 2022, 51(12): 20220222
Paper Information
Category: Lasers & Laser optics
Received: Mar. 25, 2022
Accepted: --
Published Online: Jan. 10, 2023
The Author Email: Zhao Yiqiang (yq_zhao@tju.edu.cn)
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