Results 11 to 20 of about 547 (145)
Polarization microwave correlation imaging method based on orthogonal complement space
Electronics Letters, 2023 Currently, microwave correlation imaging (MCI) is regarded as an important method to address the forward‐looking imaging problem in radar. The key step of this method is to form a spatio‐temporal two‐dimensional random radiation field through various ...
Runkun Tian +4 more
doaj +2 more sources
Optimal Mismatched Filter Design by Combining Convex Optimization With Circular Algorithm
IEEE Access, 2022 Mismatched filters (MMF) have been intensively explored for linear-frequency modulation (LFM) waveform sidelobe reduction. Unlike other design strategies, the use of convex optimization (CO) techniques is able to find the optimal design.
Ling Jin, Ju Wang, Yi Zhong, Duo Wang
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Mutual Coupling and Channel Imbalance Calibration of Colocated MIMO Radars
IEEE Open Journal of Antennas and Propagation, 2022 The Multiple-Input Multiple-Output (MIMO) radar combines the signals from multiple transmit and receive elements separately to form a virtual array. Consequently, system imperfections in the MIMO radar caused by channel imbalance and mutual coupling are ...
Ricard L. Grove +2 more
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Remote Sensing, 2022 Circular ground-based SAR (GBSAR) is a new 3D imaging GBSAR with the potential of acquiring high-quality 3D SAR images and 3D deformation. However, its donut-shaped spectrum and short radius of antenna rotation cause high sidelobes on 3D curved surfaces,
Qiming Zhang +3 more
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IET Radar, Sonar &Navigation, Volume 17, Issue 12, Page 1863-1873, December 2023., 2023 In this study, an efficient and novel algorithm based on the SQP framework and NCG method has been developed to design amplitude‐bounded sequence sets with a desired ambiguity function for MIMO radar. Numerical experiments demonstrate that the proposed algorithm can suitably shape the ambiguity function and has a better performance than the existing ...
Wenyan Wei, Yinsheng Wei, Lei Yu
wiley +1 more source
Chaotic Coding for Interference Suppression of Digital Ionosonde
Remote Sensing, 2023 External interference in ionospheric sounding seriously degrades the quality of echo signals and data; thus, it should be eliminated. This paper presents a method for suppressing interference using chaotic coding with a set of Bernoulli map sequences ...
Sijia Han +9 more
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Electronics Letters, Volume 59, Issue 21, November 2023., 2023 The range‐angle coupling characteristics of traditional frequency diverse array (FDA) will deteriorate target localization performance. To address this problem, several decoupling methods for FDA have been developed in the past decade, mainly including deterministic methods and global optimization methods.
Mengxuan Xiao +4 more
wiley +1 more source
Sidelobe suppression for phase-coded pulse by mainlobe windowing
The Journal of Engineering, 2019 Mismatched filter is an important technique to suppress the sidelobes of phase-coded pulses. Here, the authors propose a mainlobe windowing procedure, by which a much lower sidelobe level can be obtained at a slightly signal-to-noise ratio loss. Based on
Jiacen Xu, Lixiang Ren, Haofei Wang
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Improved DOA estimation using polarisation diversity : simulations using a wideband propagation model [PDF]
, 2000 This paper investigates the performance of a number of direction-of-arrival (DOA) estimation algorithms in a wideband macrocellular channel using a dual-polarised antenna array.
AlMidfa, K, Nix, AR, Temeh, EK
core +2 more sources
IET Signal Processing, Volume 16, Issue 9, Page 1085-1093, December 2022., 2022 Abstract By controlling the null distribution in the range‐angle dimension, the frequency diverse array (FDA) can handle range‐dependent interference, which is usually difficult to solve for the traditional phased array. However, the current investigations focus more on the design of weights for null control, ignoring the unique design dimension of FDA,
Xiaolang Shao +3 more
wiley +1 more source