Article
Engineering, Electrical & Electronic
David Ernesto Troncoso Romero, Miriam Guadalupe Cruz Jimenez
Summary: The paper introduces a DSP architecture for computing single bins of the DFT with low complexity. It has the advantage of potentially requiring only one accumulator in the high-rate section and a low-order FIR filter in the low-rate section in certain cases. The optimization algorithm depends on the frequency bin to be computed and the number of DFT points.
IEEE SIGNAL PROCESSING MAGAZINE
(2021)
Article
Acoustics
Michal Luczynski, Andrzej Dobrucki, Stefan Brachmanski
Summary: The method eliminates the tonal component of an acoustic signal by detecting its parameters, adding a 180-degree phase-shifted sinusoidal signal, with reduction levels ranging from 6.9 to 31.5 dB.
ARCHIVES OF ACOUSTICS
(2021)
Article
Automation & Control Systems
Tushar Tyagi
Summary: This article introduces a modified filter structure based on the sliding DFT, which changes the comb filter coefficient to positive and the comb filter delay from N to N/2. Compared to the conventional sliding DFT filter, the proposed filter structure is able to track the input signal within half a cycle. It can be tuned to both fractional and integer bin indices without affecting the computational complexity. The practical feasibility of the proposed filter is experimentally verified by implementing it in a field programmable gate array.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Xingjian Sun, Shailee Yagnik, Ramanarayanan Viswanathan, Lei Cao
Summary: This paper investigates the performance of using the XOR rule to detect deterministic signals in bivariate Gaussian noise. The study finds that when the correlation coefficient approaches 1, the XOR rule with identical, alternating partitions of observations at the sensors (XORAP) is the optimal fusion rule. The Bayes error of XORAP decreases to zero at a slower rate compared to the exponential decrease of CLRT.
Article
Engineering, Electrical & Electronic
Magdy Tawfik Hanna
Summary: Batch algorithms for generating optimal orthonormal eigenvectors of a square unitary matrix are presented. The algorithms utilize the singular value decomposition technique to generate the eigenvectors efficiently. The results are applied to the generation of a specific type of discrete Fourier transform kernel matrix and their relative advantages are demonstrated through extensive simulations.
DIGITAL SIGNAL PROCESSING
(2022)
Article
Computer Science, Information Systems
Jae-Mo Kang
Summary: This letter proposes an optimized threshold-based preamble detection method for LoRa systems, which improves the detection performance by maximizing the preamble detection probability while satisfying a constraint on false alarm rate. The proposed scheme is evaluated through performance analysis and simulation results, demonstrating its superiority and effectiveness.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Kai Wang, Jun Wang, Jian Song, Lu Tang, Xuansheng Shan, He Wen
Summary: In this paper, a novel DFT-based method is proposed for estimating unknown components in multifrequency real-valued sinusoidal signals. By considering the sidelobe interference and spectrum leakage, the proposed method can completely avoid the impact of multi-component interference and demonstrates high competitiveness in experiments and simulations.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Zhenrong Zhang, Jianping Li, Yuncai Wang, Yunwen Qin
Summary: The proposed scheme utilizes a DFB laser with large linewidth as the pilot carrier and a low-complexity PPC algorithm combined with INS to reduce cost and enhance SNR. By pre-compensating the phase noise in time domain before FFT demodulation, the system achieves 3-dB SNR improvement and significantly improves laser linewidth tolerance for DMT signal transmission.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Deyun Wei, Jun Yang
Summary: A novel estimation algorithm is proposed for non-uniform discrete Fourier transform (NUDFT) in this paper, which achieves compression of sparse signals and accurate detection of frequencies.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2022)
Article
Engineering, Civil
Liu Zhang, Shengchun Piao, Junyuan Guo, Xiaohan Wang
Summary: In this study, an algorithm based on long-time coherent integration is proposed to achieve robust tonal signal detection under the influence of a Doppler frequency shift. The algorithm splits the received narrowband signals radiated by moving targets into multiple segments and applies a polynomial Radon-polynomial Fourier transform (PRPFT) to compensate for time-variant frequency drift and phase difference. Simulation results demonstrate that the proposed algorithm provides higher frequency resolution and coherent integration gain even in the case of severe Doppler shift. Sea trials also show that the method can achieve coherent integration for signals with a duration of several hundred seconds under different experimental conditions.
IEEE JOURNAL OF OCEANIC ENGINEERING
(2023)
Article
Telecommunications
Alphan Sahin, Nozhan Hosseini, Hosseinali Jamal, Safi Shams Muhtasimul Hoque, David W. Matolak
Summary: In this study, a framework for chirp-based communications using DFT-s-OFDM is proposed, showing that a well-designed FDSS filter can convert its single-carrier nature to a linear combination of chirps. Chirps with low ripples in the frequency domain result in a lower BER due to less noise enhancement. The noise enhancement can also be addressed by exploiting repetitions in the frequency domain.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Optics
Junda Chen, Zihe Hu, Zheng Yang, Yizhao Chen, Mingming Zhang, Yifan Zeng, Weihao Li, Chen Cheng, Ziwen Zhou, Xuefemg Wang, Deming Liu, Ming Tang
Summary: The study introduces PDM-SHD technology into NFDM systems to overcome the baud rate limitation of eigenvalue communications, proposing an adaptive polarization control strategy and utilizing optical injection locking to reduce signal interference effects.
Article
Engineering, Electrical & Electronic
Kai Wang, He Wen, Li Xu, Lanlan Wang
Summary: This paper introduces a non-iterative IpDFT algorithm named I2pNDFT for parameter estimation of damped real-valued sinusoidal signals. Compensating both long- and short-range leakages accurately estimate the parameters. Simulation results show the effectiveness of this method compared to other IpDFT methods.
IEEE SIGNAL PROCESSING LETTERS
(2021)
Article
Computer Science, Information Systems
Saeed Mohammadzadeh, Vitor H. Nascimento, Rodrigo C. De Lamare, Osman Kukrer
Summary: A novel and robust algorithm for adaptive beamforming is proposed in this paper, which reconstructs the autocorrelation sequence from a set of measured data. The proposed approach achieves better overall performance with little prior information required.
Article
Geochemistry & Geophysics
Yicen Liu, Peiyan Zhao, Denghui Yao, Bo Liu, Junning Zhang
Summary: This letter proposes two iterative, fast, and accurate approaches for estimating the direction of arrival (DOA) of a single source signal from a single observation of an array data. Numerical results demonstrate that QS-DOAEA achieves significant improvement in estimation accuracy and TAQ-DOAEA expedites the convergence. The proposed algorithms provide more than 80x reduction in the computational cost compared to the baseline method.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2023)
