A Lidar Receiver for Speed Measurement Based on Software Radio

被引：0
|
作者：
Wang, Jiqiang [1 ]
Wang, Chang [1 ]
Lei, Tao [1 ]
Song, Zhiqiang [1 ]
Hou, Moyu [1 ]
机构：
[1] Shandong Key Lab Opt Fiber Sensing Technol, Jinan 250014, Shandong, Peoples R China
来源：
FRONTIERS IN COMPUTER EDUCATION | 2012年 / 133卷
关键词：
Lidar receiver; Software radio; IF quadrature demodulation; SW Dual Conversion; Doppler frequency error;
D O I：
暂无
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
Against characteristics of large bandwidth and low SNR belong to the echo signal. and in the application of software radio idea, a wide-band receiver scheme for continuous-wave lidar by combining SW Dual Conversion with IF digital quadrature demodulation structure is presented and realized. The effect of sample rate deviation to velocity accuracy is analyzed, and the compensation measure is raised. Simulation experiments indicate that the demodulation of echo signal to a unified IF signal by SW Dual Conversion solves the difficult problem of direct sampling to wide-band signal due to limited sampling rate, and it has excellent frequency selection. Also, compared with traditional approach and analog quadrature detection mode, the performance has been significantly improved. By using frequency offset correction. Doppler frequency error caused by sampling rate deviations can be eliminated.
引用
收藏
页码：915 / 921
页数：7
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