A High Resolution SF-LFM Radar System based on USRP X310

In this paper, we investigate a step-frequency linear-frequency-modulation (SF-LFM) radar for high resolution ranging and imaging based on USRP X310 equipped with UBX-160 daughter-boards. A wideband LFM baseband signal is adopted in this platform because of its high quality of amplitude and frequency characteristics while can be easily generated by digital techniques and match filter processing is used while it's insensitive to doppler shift of echo data. The transmitting signal is divided into two channels through power divider, one channel is transferred to transmitting horn antenna through amplifier, and the other is transferred directly to the receiver. The receiving signal at each step frequency band is deconvoluted by using inverse filter technique while the receiving signal of second channel is regarded as reference signal. A reflection spectrum reconstruction method is proposed to synthesize wideband response signal and a one-dimensional distance image can be obtained. With the movement of Tx/Rx, a B-scan radar profile can be obtained and 2-dimensional image can be obtained.

[1]  Aileen B. Caberos,et al.  Underground Target Objects Detection Simulation Using FMCW Radar with SDR Platform , 2018, 2018 IEEE 10th International Conference on Humanoid, Nanotechnology, Information Technology,Communication and Control, Environment and Management (HNICEM).

[2]  J. Ralston,et al.  Software defined radar: An open source platform for prototype GPR development , 2012, 2012 14th International Conference on Ground Penetrating Radar (GPR).

[3]  Giuseppe Di Massa,et al.  High Resolution Software Defined Radar System for Target Detection , 2013, WorldCIST.

[4]  Yang Yang,et al.  Chirp Sub-pulse Stepped Frequency Radar Signal Processing , 2010, 2010 Third International Symposium on Information Processing.

[5]  M. S. Arifianto,et al.  Wireless transmission using universal software radio peripheral , 2009, 2009 International Conference on Space Science and Communication.

[6]  Vivian Neil Fernandes.  Implementation of a RADAR System using MATLAB and the USRP , 2012 .

[7]  Achmad Munir,et al.  GNU Radio based software-defined FMCW radar for weather surveillance application , 2011, 2011 6th International Conference on Telecommunication Systems, Services, and Applications (TSSA).

[8]  Amin M. Abbosh,et al.  Software-Defined Radar for Medical Imaging , 2016, IEEE Transactions on Microwave Theory and Techniques.

[9]  Theo G. Swart,et al.  Implementation of a GNU radio and python FMCW radar toolkit , 2017, 2017 IEEE AFRICON.

[10]  Jian Dong,et al.  A Multi-Scale Weighted Back Projection Imaging Technique for Ground Penetrating Radar Applications , 2014, Remote. Sens..

[11]  Yanhua Wang,et al.  Bandwidth synthesis for stepped chirp signal: A multichannel sampling prospective , 2013 .

[12]  Werner Wiesbeck,et al.  SDRS: software-defined radar sensors , 2001, IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217).