Results 1 to 10 of about 31,026 (252)
IEEE AccessNoises are commonly present in grayscale images, particularly in Scanning Electron Microscope (SEM) images especially secondary emission noise, which can significantly affect their quality.
Kok Swee Sim
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A Signal-to-Noise Ratio Estimation Method for Underwater Acoustic Adaptive Communication
水下无人系统学报, 2022 To solve the problem of signal-to-noise ratio(SNR) estimation for dynamic communication, an SNR estimation method suitable for underwater acoustic adaptive communication in trans-media heterogeneous networks was proposed.
Wei WANG +4 more
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Improved Weighted Matching Pursuit based Channel Estimation Algorithm
Guangtongxin yanjiu, 2022 Compressive sensing based matching pursuit algorithm can estimate the channel state information of communication system with shorter pilot sequences. It has the advantages of lower computational complexity and less number of pilots.
Zhi-guo Lü, Meng QI, Hong-xiang SHAO
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023 Signal-to-noise ratio (SNR) is an important radiation characteristic parameter for remote sensing image quality assessment as well as a key performance indicator for remote sensing sensors.
Wenzhong Tian +5 more
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Noise estimation in single coil MR images
Biomedical Engineering Advances, 2021 Magnetic resonance (MR) signal is degraded by acquisition noise. Estimation and removal of noise from MR images is essential for analysis and further pre-processing. The work proposes a new method for noise variance estimation in single coil magnitude MR
Archana Chaudhari, Jayant Kulkarni
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Joint Channel Estimation Algorithm Based on DFT and DWT
Applied Sciences, 2022 Channel estimation is an important component of orthogonal frequency division multiplexing (OFDM) systems. The existence of virtual subcarriers leads to energy spreading in the time-domain when using Inverse Fast Fourier Transform (IFFT), resulting in ...
Zhe Zhang, Xin Bian, Mingqi Li
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Continuous Hidden Markov Model Based Spectrum Sensing with Estimated SNR for Cognitive UAV Networks
Sensors, 2022 In this paper, to enhance the spectrum utilization in cognitive unmanned aerial vehicle networks (CUAVNs), we propose a cooperative spectrum sensing scheme based on a continuous hidden Markov model (CHMM) with a novel signal-to-noise ratio (SNR ...
Yuqing Feng +3 more
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Optimization Algorithm for DOA Estimation of a Shallow Sea Target Based on Active Time Reversal [PDF]
Xibei Gongye Daxue Xuebao, 2018 Time reversal technique is applied to the DOA estimation of a shallow sea target, and a method based on active time reversal (ATR) is proposed to achieve correct estimation under multipath and low signal-to-noise (SNR) conditions. Combining the classical
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IET Communications, 2023 Orthogonal frequency division multiplexing (OFDM) technology has been increasingly applied to power line carrier communication (PLC). Discrete Fourier Transformation (DFT)‐based channel estimation algorithm is suitable for OFDM‐based PLC due to its low ...
Gao Fan +7 more
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Significant Wave Height Estimation Using Multi-Satellite Observations from GNSS-R
Remote Sensing, 2021 This study proposes a significant wave height (SWH) retrieval method based on multi-satellite observations using Global Navigation Satellite System Reflectometry (GNSS-R).
Lingyu Qin, Ying Li
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