Two-Stage Fast DOA Estimation Based on Directional Antennas in Conformal Uniform Circular Array

In conformal array radar, due to the directivity of antennas, the responses of the echo signals between different antennas are distinct, and some antennas cannot even receive the target echo signal. These phenomena significantly affect the accuracy of direction-of-arrival (DOA) estimation. To implement accurate DOA estimation in a conformal uniform circular array (UCA) composed of directional antennas, the two-stage fast DOA estimation algorithm is proposed. In the pre-processing stage, multi-target decoupling and target detection are mainly used to obtain the targets’ range bin indexes set; in the rough-precise DOA estimation stage, the amplitude and phase information of each antenna are used for rough DOA estimation and precise DOA estimation, respectively. Based on simulation and actual anechoic chamber radar experiments, and through quantitative analyses of the accuracy, validity and elapsed time of the two-stage fast DOA estimation algorithm compared with the directional antenna MUSIC (DA-MUSIC), sub-array MUSIC (S-MUSIC) and Capon-like algorithms, results indicate that the two-stage fast DOA estimation algorithm can rapidly and accurately estimate DOAs in a multi-target scenario without the range-angle pair-matching procedure. Lower computational complexity and superior estimation accuracy provide the two-stage fast DOA estimation algorithm a broader application prospect in the practical engineering field.

[1]  Dmitry M. Malioutov,et al.  A sparse signal reconstruction perspective for source localization with sensor arrays , 2005, IEEE Transactions on Signal Processing.

[2]  Yong-Xin Guo,et al.  Frequency-invariant pattern synthesis of conformal array antenna with low cross-polarisation , 2008 .

[3]  Ilan Ziskind,et al.  Maximum likelihood localization of multiple sources by alternating projection , 1988, IEEE Trans. Acoust. Speech Signal Process..

[4]  R. O. Schmidt,et al.  Multiple emitter location and signal Parameter estimation , 1986 .

[5]  Guisheng Liao,et al.  An Eigenstructure Method for Estimating DOA and Sensor Gain-Phase Errors , 2011, IEEE Transactions on Signal Processing.

[6]  J. Capon.  High-resolution frequency-wavenumber spectrum analysis , 1969 .

[7]  Ping Li,et al.  A novel DOA estimation algorithm using directional antennas in cylindrical conformal arrays , 2020 .

[8]  Visa Koivunen,et al.  DoA Estimation Via Manifold Separation for Arbitrary Array Structures , 2007, IEEE Transactions on Signal Processing.

[9]  Xi Chen,et al.  DOA estimation of LFM sources based on time-frequency interferometer in UCA , 2019 .

[10]  Mark A. Richards,et al.  Fundamentals of Radar Signal Processing , 2005 .

[11]  Fatemeh Afkhaminia,et al.  2D off‐grid DOA estimation using joint sparsity , 2019, IET Radar, Sonar & Navigation.

[12]  Pierre Comon,et al.  Tensor DoA Estimation With Directional Elements , 2017, IEEE Signal Processing Letters.

[13]  Benjamin Friedlander,et al.  The root-MUSIC algorithm for direction finding with interpolated arrays , 1993, Signal Process..

[14]  Xi Chen,et al.  DOA Estimation for Coprime Linear Array Based on MI-ESPRIT and Lookup Table , 2018, Sensors.

[15]  Xiaofei Zhang,et al.  Joint Angle and Array Gain-Phase Errors Estimation Using PM-like Algorithm for Bistatic MIMO Radar , 2013, Circuits Syst. Signal Process..

[16]  Petra Ostermann,et al.  Conformal Array Antenna Theory And Design , 2016 .

[17]  Van Trees,et al.  Detection, Estimation, and Modulation Theory. Part 1 - Detection, Estimation, and Linear Modulation Theory. , 1968 .

[18]  Zaiping Nie,et al.  ROBUST ADAPTIVE BEAMFORMER USING INTERPOLATION TECHNIQUE FOR CONFORMAL ANTENNA ARRAY , 2010 .

[19]  Feng Yang,et al.  DOA Estimation with Sub-Array Divided Technique and Interporlated ESPRIT Algorithm on a Cylindrical Conformal Array Antenna , 2010 .

[20]  Dariush Abbasi-Moghadam,et al.  DOA estimation in conformal arrays based on the nested array principles , 2016, Digit. Signal Process..

[21]  Xingpeng Mao,et al.  Design methods for ULA-based directional antenna arrays by shaping the Cramér-Rao bound functions , 2018, IET Signal Process..

[22]  F. Yang,et al.  Synthesis of Conformal Phased Array With Improved NSGA-II Algorithm , 2009, IEEE Transactions on Antennas and Propagation.

[23]  Z S Qi,et al.  BLIND DIRECTION-OF-ARRIVAL ESTIMATION ALGORITHM FOR CONFORMAL ARRAY ANTENNA WITH RESPECT TO POLARISATION DIVERSITY , 2011 .

[24]  Philip S. Yu,et al.  Direction-of-Arrival Estimation Based on Deep Neural Networks With Robustness to Array Imperfections , 2018, IEEE Transactions on Antennas and Propagation.

[25]  Sreeraman Rajan,et al.  Direction of Arrival Estimation Using Directive Antennas in Uniform Circular Arrays , 2015, IEEE Transactions on Antennas and Propagation.

[26]  Harry L. Van Trees,et al.  Detection, Estimation, and Modulation Theory, Part I , 1968 .

[27]  Thomas Kailath,et al.  ESPRIT-estimation of signal parameters via rotational invariance techniques , 1989, IEEE Trans. Acoust. Speech Signal Process..

[28]  Hong Gu,et al.  Sensor Gain-Phase Errors Estimation Using Disjoint Sources in Unknown Directions , 2016, IEEE Sensors Journal.

[29]  S. Frick,et al.  Compressed Sensing , 2014, Computer Vision, A Reference Guide.

[30]  Jie Sun,et al.  Passive Localization of Near-Field Sources Based on Overlapped Subarrays , 2020, Circuits Syst. Signal Process..

[31]  Lutao Liu,et al.  Joint Estimation of 2D-DOA and Frequency Based on Space-Time Matrix and Conformal Array , 2013, TheScientificWorldJournal.

[32]  Li Bai,et al.  Association of DOA Estimation From Two ULAs , 2008, IEEE Transactions on Instrumentation and Measurement.

[33]  Weijian Si,et al.  Two-Dimensional DOA Estimation for Three-Parallel Nested Subarrays via Sparse Representation , 2018, Sensors.

[34]  Daegun Oh,et al.  Joint DFT-ESPRIT Estimation for TOA and DOA in Vehicle FMCW Radars , 2015, IEEE Antennas and Wireless Propagation Letters.

[35]  Rahmat Sanudin,et al.  Capon-like DOA estimation algorithm for directional antenna arrays , 2011, 2011 Loughborough Antennas & Propagation Conference.

[36]  Wei Yang,et al.  Direction of arrival estimation on cylindrical conformal array using RARE , 2011 .

[37]  Joseph Haim Didi,et al.  Repeated sorting on the sliding window for OS-CFAR , 2019 .