You Zhiyuan
ABSTRACT
The traditional algorithm does not make full use of the redundant virtual elements in the same position of the "difference array", which still contain a lot of target parameter information. In this paper, a new processing algorithm is proposed. The redundant virtual elements in the same position are summated, and then the average value is calculated. The average value of the same element position is used to replace the original value of only one virtual element in the same position, so that a virtual received signal which makes full use of the virtual redundant elements can be obtained. Then the music algorithm is used to estimate the spatial spectrum to get DOA. Then, the algorithm is extended from single base nested array to double base nested array. The simulation results show that the algorithm is effective in two kinds of array structures.
- CHEN C Y, VAIDYANATHAN P P. Minimum redundancy MIMO radars[C]//Proc. of the International Symposium on Circuits & Systems, 2008: 45--48.Google Scholar
- PAL P, VAIDYANATHAN P P. Nested arrays: a novel approach to array processing with enhanced degrees of freedom[J]. IEEE Trans. on Signal Processing, 2010, 58(8):4167--4181.Google ScholarDigital Library
- PAL P, VAIDYANATHAN P P. Coprime sampling and the MUSIC algorithm[C]//Proc. of the Digital Signal Processing Workshop and IEEE Signal Processing Education Workshop (DSP/SPE), 2011: 289--294.Google Scholar
- Pal P, Vaidyanathan P P. Nested Arrays: A Novel Approach to Array Processing With Enhanced Degrees of Freedom[J]. IEEE Transactions on Signal Processing, 2010, 58(8):4167--4181.96.Google ScholarDigital Library
- Pal P, Vaidyanathan P P. Multiple Level Nested Array: An Efficient Geometry for 2qth Order Cumulant Based Array Processing[J]. IEEE Transactions on Signal Processing, 2012, 60(3):1253--1269.Google ScholarDigital Library
- RABIDEAU D J, PARKER P. Ubiquitous MIMO multifunction digital array radar[C] // Proc. of the 37th Asilomar Conference on Signals, Systems and Computers, 2003: 1058--1061.Google Scholar
- Luo K, Manikas A. Superresolution Multitarget Parameter Estimation in MIMO Radar[J]. IEEE Transactions on Geoscience and Remote Sensing. 2013, 51(6 Part2):3683--3693.Google ScholarCross Ref
- Han K, Nehorai A. Improved Source Number Detection and Direction Estimation With Nested Arrays and ULAs Using Jackknifing[J]. IEEE Transactions on Signal Processing, 2013, 61(23):6118--6128.Google ScholarDigital Library
- Gu J, Zhu W P, Swamy M. Joint 2-D DOA Estimation via Sparse L-shaped Array[J]. IEEE Transactions on Signal Processing, 2015, 63(5):1171--1182.Google ScholarDigital Library
- Y Liao, Zhao R, Gao L. Joint DOD and DOA Estimation in Bistatic MIMO Radar With Distributed Nested Arrays[J]. IEEE Access, 2019, 7:50954--50961.Google ScholarCross Ref
- Zheng G, Tang J. DOD and DOA estimation in bistatic MIMO radar for nested and coprime array with closed-form DOF[J]. International Journal of Electronics, 2016, 104(4-6):885--897.Google Scholar
- Schmidt R, Schmidt R O. Multiple emitter location and signal parameter estimation[J]. IEEE Transactions on Antennas & Propagation, 1986, 34(3):276--280.Google ScholarCross Ref
- Shi J, Wen F, Liu T. Nested MIMO Radar: Coarrays, Tensor Modeling and Angle Estimation[J]. IEEE Transactions on Aerospace and Electronic Systems, 2020, PP(99):1--1.Google Scholar
- ZHANG X, XU L, XU L, et al. Direction of departure (DOD) and direction of arrival (DOA) estimation in MIMO radar with reduced-dimension MUSIC[J]. IEEE Communications Letters, 2010, 14(12): 1160--1163.Google Scholar
- Y Liao, Zhao R, Gao L. Joint DOD and DOA Estimation in Bistatic MIMO Radar With Distributed Nested Arrays[J]. IEEE Access, 2019, 7:50954--50961.Google ScholarCross Ref
Index Terms
- DOA estimation method based on Redundant Array Optimization: The algorithm of extending from monostatic nested array to bistatic nested array
Recommendations
DOA estimation in conformal arrays based on the nested array principles
The nested array structure has attracted great attention recently due to its ability in reducing the number of sensors in an array and at the same time preserving the array performance. While a uniform linear array (ULA) can detect at most N - 1 sources ...
Underdetermined DOA Estimation Algorithm Based on an Improved Nested Array
AbstractA nonuniform array group is proposed to solve the inflexibility problem of existing nested arrays. The array structure in the group is not required to be composed of two or more uniform linear sub-arrays on the premise of maintaining the same ...
2-D DOA estimation via correlation matrix reconstruction for nested L-shaped array
AbstractFor a nested L-shaped array (N-LsA) composed of two orthogonal nested subarrays, the self-difference co-array of each nested subarray is hole-free, whereas cross-difference co-arrays between subarrays have holes. Due to the existence ...
Comments