A5031903832- Radar Systems and Signal Processing
- Direction-of-Arrival Estimation Techniques
- Target Tracking and Data Fusion in Sensor Networks
- Speech and Audio Processing
- Underwater Acoustics Research
- Antenna Design and Optimization
- Advanced SAR Imaging Techniques
- Blind Source Separation Techniques
- Microwave Engineering and Waveguides
- Advanced Adaptive Filtering Techniques
- Antenna Design and Analysis
- PAPR reduction in OFDM
- Image and Signal Denoising Methods
- Advanced Wireless Communication Techniques
- Advanced MIMO Systems Optimization
- Infrared Target Detection Methodologies
- Sparse and Compressive Sensing Techniques
- Mathematical Analysis and Transform Methods
- Advanced Neuroimaging Techniques and Applications
- Gaussian Processes and Bayesian Inference
- Energy Load and Power Forecasting
- Anomaly Detection Techniques and Applications
- Fault Detection and Control Systems
- Time Series Analysis and Forecasting
- Cooperative Communication and Network Coding
Hohai University
2015-2024
Southeast University
2021
Direction of arrival (DOA) estimation for coprime multiple-input multiple-output radar is studied, and a combined unitary signal parameters via rotational invariance technique (ESPRIT)-based algorithm proposed. The transmitter the receiver adopt arrays, which are sparse but still uniform. Therefore, ESPRIT first used to obtain arbitrary ambiguous DOA estimations based on invariances transmit receive respectively. After recovering all other estimations, unique achieved by finding coincide...
Direction of arrival (DOA) estimation using coprime array is studied, and an extended-aperture unitary root multiple signal classification (MUSIC)-based method proposed. The geometry prototype modified through some translations, which enable one subarray the to achieve aperture extension after transformation. Then, other can also be extended based on rotational invariance subarray, 2-D parameter estimations from two subarrays achieved in succession via 1-D MUSIC-based technique. Finally,...
A novel method for joint elevation and azimuth angles estimation with L-shaped array is proposed in this letter. The relationship between the direction matrices of two subarrays arranged along different axes first conducted via signal subspace, then can be estimated 1-D polynomial root finding, which from noise subspace. algorithm use fully subspace to achieve automatically paired angle estimations low complexity. Furthermore, it has better performance than conventional methods. Simulation...
A modified substrate integrated waveguide (SIW) H-plane horn antenna with enhanced gain and efficiency is proposed. The design features a multilayer hollow-core printed circuit board power-dividing phase-shifting structures that simultaneously achieves low dielectric loss within the refined field distribution over radiating aperture. further improved by loading dipole array at opening aperture of SIW horn. Within an impedance bandwidth 15.5%, proposed up to 12.5 dBi, radiation 90%, 510%....
The design of integrated waveform that can simultaneously perform radar and communication function is a key technology in integration. This paper proposes novel based on linear frequency modulated (LFM) signal, which performs function. Communication data different channels as well adjusting are multiplied with corresponding orthogonal sequences added together to form baseband signal then modulates the LFM signal. whole modulating process refers technologies including 2PSK CDMA. Theoretical...
A wideband endfire magnetoelectric (ME) dipole antenna fed by substrate integrated coaxial line (SICL) is presented. Endfire radiation achieved the combination of a horizontally oriented quarter-wave shorted patch and array loaded at aperture. direct-feeding mechanism based on SICL structure developed to excite ME-dipole antenna. The proposed feeding method provides simple yet effective mean impedance tuning. exhibits wide bandwidth 77%, covering from 23.1 52 GHz, small lateral size...
The problem of 2-D angle estimation for coprime multiple-input multiple-output (MIMO) radar is considered, and a low-complexity propagator based method proposed. Coprime MIMO configured with transmit receive rectangular arrays, where array has N×Q elements while M×P (M to N P Q). Based on the uniformities unitary transformation exploited transform complex data into real-valued one, then signal subspace obtained from matrix, which requires neither eigenvalue decomposition nor pseudo...
In conventional phased array radars, analogue time delay devices and phase shifters have been used for wideband beamforming. These methods suffer from insertion losses, gain mismatches variations, they occupy a large chip area. To solve these problems, compact architecture of digital antennas based on subarrays was considered. this study, the receiving beam patterns linear frequency modulation (LFM) signals were constructed by applying stretch processing via mixing with delayed reference at...
The issue of direction departure (DOD) and arrival (DOA) estimation for bistatic coprime multiple-input multiple-output (MIMO) radar is discussed, an algorithm based on combined signal parameters via rotational invariance technique (ESPRIT) proposed. transmitter receiver both adopt arrays with large inter-element spacing, which can avoid mutual coupling problem. Based the uniformity subarrays in arrays, ESPRIT employed to obtain arbitrary ambiguous estimation, then used recover all other...
A method for wideband transmit beamforming using integer-time-delayed and phase-shifted waveforms is proposed. Unlike traditional true-time-delayed digital methods, which employ variable fractional delay filters or discrete Fourier transforms to create time delays, the proposed uses only with phase shifts corresponding delays. Furthermore, shifted can be directly generated; this generation simply achieved by controlling parameters of a direct synthesiser. beam pattern simulation confirms...
A novel method for joint direction finding and array calibration in multiple‐input multiple‐output (MIMO) radar with unknown gain phase errors is proposed. The transmit receive are innovatively arranged along different axes, which orthogonal to each other. After the trilinear decomposition, influenced matrix combined estimate angles, can be calculated subsequently. proposed algorithm suitable both uniform linear (ULA) non‐ULA, it achieve favourable angle estimation without any auxiliary...
The issue of direction arrival (DOA) estimation for co-prime array is studied, and an method based on combined signal parameters via rotational invariance technique (ESPRIT) proposed. ESPRIT employed to obtain ambiguous estimation, which then can be used recover all the other estimations. Then DOA uniquely determined by finding coincide estimations from two subarrays. Compared multiple classification (MUSIC) method, proposed algorithm achieve better performance with much lower complexity....
Multichannel sub-Nyquist sampling is an efficient technique to break through the limitation of Nyquist theorem for wideband digital instantaneous frequency measurement (DIFM) receiver. The significant challenge calculating folding and solving ambiguity quickly accurately. Usually, researchers adopt a fast Fourier transform (FFT) calculate Chinese remainder (CRT) solve caused by undersampling. However, these algorithms have drawback long response time. In this paper, we use deduction...
The random finite set (RFS) approach provides an elegant Bayesian formulation of the multi-target tracking (MTT) problem without requirement explicit data association. In order to improve performance RFS-based filter in radar MTT applications, this paper proposes a time-matching filtering framework deal with caused by diversity target sampling times. Based on framework, we develop joint generalized labeled multi-Bernoulli and probability hypothesis density filter. Simulations are performed...
A wideband digital transmitting beamformer based on linear frequency modulation (LFM) signals is presented in this study. The realised as a combination of direct synthesisers and fractional delay (FD) filters polyphase structure. By using coordinate rotation computer algorithm, high intermediate LFM signal generated phase compensation for beamforming accomplished field programmable gate array. impact different number quantisation bits generation analysed. results waveform FD filter design...
A millimeter-wave (mmWave) leaky-wave antenna (LWA) with a wide bandwidth and stable endfire radiation is proposed. It demonstrated that by loading dipole array at the aperture of half-mode substrate integrated waveguide (HMSIW) LWA, phase constant leaky HMSIW can be tuned from <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\beta < k_{0}$ </tex-math></inline-formula> to \ge , thus enabling desired...
In this study, an explicit track continuity algorithm is proposed for multitarget tracking (MTT) based on the Gaussian mixture (GM) implementation of probability hypothesis density (PHD) filter. Trajectory maintenance and state extraction in GM-PHD filter have not been effectively integrated to date. To address problem, we propose improved approach, components are classified labeled, converted into multiple single-state extractions. This provides identity label individual target can shield...
A fast direction of arrival (DOA) estimation method using a real-valued cross-correlation matrix (CCM) coprime subarrays is proposed. Firstly, CCM with extended aperture constructed to obtain the signal subspaces corresponding two subarrays. By analysing relationship between subspaces, DOA estimations from are simultaneously obtained automatic pairing. Finally, unique determined based on common results Compared partial spectral search (PSS) and parameter via rotational invariance (ESPRIT)...