Results 51 to 60 of about 467 (179)
Electronics Letters, Volume 60, Issue 12, June 2024.Our manuscript introduces a novel method that modifies the normalization process in the fractional Fourier transform (FRFT) domain by incorporating a threshold mechanism to counteract the effects of non‐normal distributions. Additionally, we propose a target detection method that utilizes three new features extracted from this modified FRFT domain ...
Jian Guan +5 more
wiley +1 more source
Deep Learning‐Based Active Jamming Suppression for Radar Main Lobe
IET Signal Processing, Volume 2024, Issue 1, 2024.Due to the development of digital radio frequency memory (DRFM), active jamming against the main lobe of the radar has become mainstream in electronic warfare. The jamming infiltrates the radar receiver via the main lobe, covering up the target echo information. This greatly affects the detection, tracking, and localization of targets by radar. In this
Yilin Jiang +4 more
wiley +1 more source
Guangtongxin yanjiu, 2020 针对分数阶傅里叶变换（FRFT）对啁啾（Chirp）信号进行盲检测时存在运算量大的问题,文章提出一种针对Chirp信号参数估计的盲检测方法。首先利用改变窗长相位差法对Chirp信号进行粗估计,并利用最小二乘法进行拟合得到Chirp信号调频斜率粗估计值,然后通过FRFT对Chirp信号进行精细估计,并利用二分法对FRFT的阶次进行搜索,进一步降低算法的运算量。仿真结果表明,利用改变窗长相位差法和FRFT联合检测Chirp信号的方法,在低信噪比下具有较高精度的估计值,且其归一化均方误差接近克拉美罗下界 ...
廖烨, 刘国峰, 李康, 周文峰
doaj
IET Signal Processing, Volume 2024, Issue 1, 2024.Multipath interference in radar signals caused by sea, ground, and other environments poses significant challenges to the target detection, tracking, and classification capabilities of radar systems. Existing methods for radar signal identification require labeled samples and focus mainly on the classification of normal signals.
Kang Yan +6 more
wiley +1 more source
Fractional Mixed Weighted Convolution and Its Application in Convolution Integral Equations
Journal of Mathematics, Volume 2024, Issue 1, 2024.The convolution integral equations are very important in optics and signal processing domain. In this paper, fractional mixed‐weighted convolution is defined based on the fractional cosine transform; the corresponding convolution theorem is achieved.
Rongbo Wang, Qiang Feng, Ding-Xuan Zhou
wiley +1 more source
The Multi-stream OFDM technology based on FrFT Angle Division Multiple Access in IEEE802.11g WLAN
工程科学与技术, 2011 :In this paper, fractional Fourier transform (FrFT) angle was regarded as a kind of time-frequency combined resource, and a novel multi-stream orthogonal frequency division multiplexing (OFDM) technology based on FrFT angle division multiple access (ADMA)
Cun Hongqiang, Wang Huiqi, MA Hong
doaj
The imaging algorithm in the optimal range FrFT domain based on Doppler parameters [PDF]
AIP AdvancesIn view of the error impact of Doppler parameters estimation on SAR imaging performance, this paper constructs the energy focusing axis based on the optimal rotation angle in the optimal range FrFT (fractional Fourier transform) domain.
Z. L. Wang, Y. Xu, J. Y. Liu, G. L. Gao
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Applied SciencesTo address the challenge of monitoring BeiDou RDSS signals under low signal-to-noise ratio (SNR) and high-dynamic conditions, this paper introduces a hierarchical joint processing algorithm combining PMF-FFT and PMF-FRFT.
Huaiyi Guan +6 more
doaj +1 more source
Fractal and FractionalTo address the limitations of traditional tumor diagnostic methods in image feature extraction and model generalization, this study innovatively proposes a synergistic diagnostic model that integrates fractional Fourier transform (FrFT) and error back ...
Xuanyu Liu +3 more
doaj +1 more source
Acquisition algorithm for BOC signals in high dynamic environment
Tongxin xuebao, 2019 As the synchronization of binary offset carrier (BOC) signals couldn’t be realized in high dynamic environment by traditional acquisition algorithms,an acquisition algorithm based on fractional Fourier transform (FRFT) and discrete polynomial-phase ...
Yi PAN +3 more
doaj +2 more sources