Results 161 to 170 of about 3,627 (192)
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Development of convolution theorem in FRFT domain
2010 International Conference on Signal Processing and Communications (SPCOM), 2010The fractional Fourier transform (FRFT), which is a generalization of the Fourier transform (FT), has emerged as a very efficient mathematical tool for signals which are having time-dependent frequency component. FRFT has an advantage over other transforms being used in the application areas like: signal processing and optics.
Ashutosh Kumar Singh, Rajiv Saxena
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Using FRFT to estimate target radial acceleration
2007 International Conference on Wavelet Analysis and Pattern Recognition, 2007Radial acceleration of radar target is characteristic of relative motion between radar and target, and is significant for maneuvering target recognition and tracking. To estimate radial acceleration from radar echo, fractional Fourier transformation (FRFT) was used in this paper.
null Wen-Chao Du +2 more
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Blurred defocused image restoration based on FRFT
Wuhan University Journal of Natural Sciences, 2007A technique for restoring the blurred image resulted from defocusing of the lens is proposed in this paper, which is based on fractional Fourier transform (FRFT). The FRFT, as a powerful tool for the analysis of time-varying signals, is closely connected with the optical imaging system.
Wentao Yang +3 more
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Anti-jamming Performance Analysis of FRFT-OFDM
2010 First International Conference on Pervasive Computing, Signal Processing and Applications, 2010The OFDM system based on the fractional Fourier transform (FRFT-OFDM) is robust against fast-fading channel. However, the performance of anti-jamming is not analyzed. In this paper, the anti-jamming performance of the FRFT-OFDM system under multitone jamming (MTJ) and linear frequency modulated (LFM) jamming is evaluated.
Qian Yang, Ran Tao, Jia Ni
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Research on FRFT-PPM underwater acoustic communication system
2010 3rd International Congress on Image and Signal Processing, 2010To resolve the low communication rate and susceptible to multipath interference and other issues of pulse modulation communication method, a new scheme of underwater acoustic (UWA) communication was proposed based on fractional Fourier transform (FRFT).
Yun Chen, Ping Cai, Yilin Wang
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A Novel FRFT Beamformer for Rayleigh Faded Channels
Wireless Personal Communications, 2008A method of optimal beamforming for flat Rayleigh faded channels using the Fractional Fourier Transform (FRFT) is considered in this paper. It has been demonstrated through simulations that optimal beamforming with FRFT allows smaller mean-square errors in restoring signals degraded with linear time-or frequency variant distortions and Additive White ...
Rajesh Khanna, Rajiv Saxena
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LFM and FRFT to a novel FSK method
2017 6th International Conference on Computer Science and Network Technology (ICCSNT), 2017With cosine signal as carrier, the traditional Frequency shift keying (FSK) method achieves fast non-coherent demodulation by FFT. But as carrier, the cosine signal has the shortcomings of non-time-varying the signal, fixed frequency, anti-interference and poor security performance.
Shuai Qi +3 more
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Study of VLF Communication Technique Based on FRFT
Applied Mechanics and Materials, 2014The atmospheric noise generated by lightning phenomena is the main source of interference in VLF communications, it is rather difficult to detect the communication signal that not only merged in strong channel noise, but probably interfered by high-tension impulse caused by thunder.
Yan Jun Wu, Gang Fu, Qian He
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Optimum FrFT domain cyclostationarity based adaptive beamforming
Signal, Image and Video Processing, 2018Essentially, the observed signal of interest is buried under the clutter due to high backscatters in radar or sonar applications. The presence of colored-Gaussian stationary noise (clutter) degrades the traditional beamformers, significantly. A new adaptive beamforming technique is presented here based on the numerical selection of the fractional order.
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Sea Clutter Suppression using EMD-SVD- FRFT Filtering
2019 International Conference on Control, Automation and Information Sciences (ICCAIS), 2019Sea clutter suppression is one of the major measures to improve target detection from sea clutter. Singular value decomposition-fractional Fourier transform (SVD-FRFT) filtering is conducted to suppress sea clutter without impairing the target even when the target and first-order sea clutter are mixed in the Doppler spectrum.
Wenguang Wang, Cheng Chen, Yilin Wang
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