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Joint DFT-ESPRIT Estimation for TOA and DOA in Vehicle FMCW Radars

Joint DFT-ESPRIT Estimation for TOA and DOA in Vehicle FMCW Radars
Kim, SangdongOh, DaegunLee, Jonghun
DGIST Authors
Kim, SangdongOh, DaegunLee, Jonghun
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2D-ESPRITContinuous Wave RadarDirection of ArrivalDiscrete Fourier TransformsEstimationEstimation of Signal Parameters via Rotational Invariance TechniquesFrequency-Modulated Continuous Wave RadarsFrequency EstimationFrequency ModulationIntelligent SystemsJoint TOA/DOALow ComplexityMean Square ErrorMonte-Carlo MethodMultiple Signal ClassificationRadarRadar SystemsRadar Target RecognitionReal-Time ImplementationsReal Time ControlRoot Mean Square ErrorsTime of ArrivalTime of Arrival (TOA)Vehicle RadarVehiclesWavelet Analysis
This letter proposes a joint discrete Fourier transform (DFT)-estimation of signal parameters via rotational invariance techniques (ESPRIT) estimator for time-of-arrival (TOA) and direction-of-arrival (DOA) in vehicle frequency-modulated continuous-wave (FMCW) radars. Since the vehicle FMCW radar should recognize vehicles in the side/rear area when the driver initiates a lane change, the estimation of the joint TOA/DOA between the radar and targets is an important issue for solving complicated location tasks. However, conventional joint estimation methods such as 2D-ESPRIT and 2D-multiple signal classification (MUSIC) cannot be adopted for real-time implementation due to their high computational loads. To satisfy the required accuracy specifications and reduce complexity compared with the conventional estimator, we propose a low-complexity joint TOA and DOA estimator that uses the combined DFT-ESPRIT algorithm for FMCW radars. The performance of the proposed estimation in multitarget environments was derived and compared with the Monte Carlo simulation results. The root-mean-square error (RMSE) of the proposed method was compared with that of 2D-ESPRIT with various parameters. To verify the performance of the proposed combination method, we implemented the FMCW radar and verified its performance in an anechoic chamber environment. © 2015 IEEE.
Institute of Electrical and Electronics Engineers Inc.
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Appears in Collections:
Convergence Research Center for Collaborative Robots 1. Journal Articles
Division of Automotive Technology Advanced Radar Tech. Lab 1. Journal Articles
Convergence Research Center for Future Automotive Technology 1. Journal Articles


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