17 papers · ranked by Valyu relevance
Adam Whipple, Mark W. Ruzindana, Mitchell C. Burnett, Jakob W. Kunzler + 3 more
'Jakob W. Kunzler' 'Kayla Lyman' 'Brian D. Jeffs' 'Karl F. Warnick'] Wideband beamforming and interference cancellation for phased array antennas requires advances in signal processing algorithms, software, and specialized hardware platforms. A high-throughput array receiver has been developed that enables…
Lauren O. Lusk, Joseph D. Gaeddert, Stefano Savazzi
As the number of devices using wireless communications increases, the amount of usable radio frequency spectrum becomes increasingly congested. As a result, the need for robust, adaptive communications to improve spectral efficiency and ensure reliable communication in the presence of interference is apparent. One…
Krutant J. Mehta, Inder J. Gupta, Stefano Savazzi
In this paper, we establish criteria for the design of small aperture antenna arrays for Direction of Arrival (DOA) estimation. We define a small aperture antenna array as one consisting of a few elements with an average interelement spacing less than or equal to half a wavelength. We use the spatial covariance matrix…
Yawei Tang, Weiming Deng, Jianfeng Li, Xiaofei Zhang + 1 more
'Ram M. Narayanan'] Due to their ability to achieve higher DOA estimation accuracy and larger degrees of freedom (DOF) using a fixed number of antennas, sparse arrays, etc., nested and coprime arrays have attracted a lot of attention in relation to research into direction of arrival (DOA) estimation. However, the usage…
Júlio Cesar Eduardo de Souza, Montserrat Parrilla Romero, Ricardo Tokio Higuti, Óscar Martínez-Graullera + 1 more
'Ricardo Tokio Higuti' 'Óscar Martínez-Graullera' 'Sylvain Girard'] This work provides a guide to design ultrasonic synthetic aperture systems for non-grid two-dimensional sparse arrays such as spirals or annular segmented arrays. It presents an algorithm that identifies which elements have a more significant impact on…
Bingbing Chen, Yufa Sun, Anastasios Doulamis
Spectral peak search is an essential part of the frequency domain parametric method. In this paper, a spectral peak search algorithm employing the principle of compressed sensing (CS) is proposed to rapidly estimate the spectral peaks. The algorithm adopts fast Fourier transform (FFT) with a few points to obtain the…
Dragan Golubović, Miljko Erić, Nenad Vukmirović, Akanksha Bhutani + 1 more
'Mario Pauli'] In this paper, we present a new high-resolution algorithm for primary signal processing in High Frequency Surface Wave Radar (HFSWR). The algorithm has been developed to achieve and improve primary signal processing performance in existing HFSWR radars in terms of radar target detection. The proposed…
Jie Wang, Shujuan Ding, Na Wei, Jinzhi Bi + 2 more
To suppress non-stationary main-lobe interference, we utilized the waveform information of the transmitted signal and proposed an interference suppression method based on a multi-polarized array without the need for calculating the target parameters. This method calculates the steering vector of the target through…
Chanhee Bae, Seongjoo Lee, Yunho Jung, Ali Khenchaf
This paper proposes a high-speed continuous wavelet transform (CWT) processor to analyze vital signals extracted from a frequency-modulated continuous wave (FMCW) radar sensor. The proposed CWT processor consists of a fast Fourier transform (FFT) module, complex multiplier module, and inverse FFT (IFFT) module. For…
Sameh Abdelazim, David Santoro, Fred Moshary, Marco Diani
In this paper, we present the logic designs of two FPGA hardware programming algorithms implemented for a Coherent Doppler Lidar system used in wind sensing. The first algorithm divides the received time-domain signals into segments, each corresponding to a specific spatial resolution. It then calculates the power…
Lukas P. A. Arts, Egon. L. van den Broek
The spectral analysis of signals is currently either dominated by the speed-accuracy trade-off or ignores a signal’s often non-stationary character. Here we introduce an open-source algorithm to calculate the fast continuous wavelet transform (fCWT). The parallel environment of fCWT separates scale-independent and…
Yunsu Bae, Hajung Lee, Hyojun Park, Won-ho Jang + 4 more
Real-time wideband radio frequency (RF) spectrum monitoring is increasingly important for unmanned aerial vehicle (UAV) detection and RF surveillance. Low-cost software-defined radio (SDR) networks are attractive but constrained by limited instantaneous bandwidth per node, I/Q data transfer bottlenecks over USB 2.0…
Baoping Meng, Guangbao Shan, Yanwen Zheng, Sergey Y. Yurish + 1 more
'Arman Roohi'] With the rapid development of electronic information and computer science, the fast Fourier transform (FFT) has played an increasingly important role in digital signal processing (DSP). This paper presented a spectrum processing chiplet design method to solve slow speed, low precision, and low resource…
Yue Cao, Shuchen Guo, Shuai Jiang, Xuan Zhou + 6 more
'Yunhua Luo' 'Zhongjun Yu' 'Zhimin Zhang' 'Yunkai Deng' 'Andrzej Stateczny'] This study conducts an in-depth evaluation of imaging algorithms and software and hardware architectures to meet the capability requirements of real-time image acquisition systems, such as spaceborne and airborne synthetic aperture radar (SAR)…
Jaehyeon Lee, Dongmin Jeong, Seongwook Lee, Myeongjin Lee + 3 more
'Wookyung Lee' 'Yunho Jung' 'Mateusz Malanowski'] Synthetic aperture radar (SAR), which can generate images of regions or objects, is an important research area of radar. The chirp scaling algorithm (CSA) is a representative SAR imaging algorithm. The CSA has a simple structure comprising phase compensation and fast…
Xuzhao Yang, Hui Tian, Fan Wang, Jinping Ni + 2 more
'Michele Norgia'] The Laser Light Screen System faces critical technical challenges in high-speed, long-range target detection: when a target passes through the light screen, weak light flux variations lead to significantly degraded signal-to-noise ratios (SNRs). Traditional signal processing algorithms fail to…
Jixing Guan, Junyu An, Guisheng Liao, Shah Nawaz Burokur + 1 more
In the field of security screening imaging, millimeter-wave technology offers high imaging resolution and low radiation energy. However, it faces challenges such as difficulty in imaging non-cooperative moving targets, as well as bulky equipment and high costs. This paper proposes a high-resolution imaging method based…