Proceedings ArticleDOI
Fast computation of the ambiguity function
Wei-Qiang Zhang,Ran Tao,Yong-feng Ma +2 more
- Vol. 3, pp 2124-2127
TLDR
Both the theory and the simulations show that, pro weighted zoom FFT method has lower computational complexity, less memory need and negligible error, and can meet the need of real-time processing.Abstract:
This paper addresses the problem of fast computation of the ambiguity function using a new method based on pre-weighted zoom FFT algorithm, which employs zoom FFT technique and performs the weighting process previously and thus gets ride of the extra computation. The computational complexity of the presented algorithm is compared with other methods and the simulation results are given. Both the theory and the simulations show that, pro weighted zoom FFT method has lower computational complexity, less memory need and negligible error, and can meet the need of real-time processing.read more
Citations
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Computationally Efficient Implementation of Joint Detection and Parameters Estimation of Signals with Dispersive Distortions on a GPU
TL;DR: The article discusses the implementation of a signal detector that allows for real-time operation and a comparison of implementations of algorithms for estimating the Doppler frequency shift through multiplication by a complex exponent and the fast Fourier transform is performed.
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Analysis of 3-D integral imaging displays using the Wigner distribution
TL;DR: It is shown that the entire intensity distribution in the pick-up image plane of 3-D integral imaging systems can be obtained from a single 2-D Wigner distribution function of a single lenslet pupil.
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An adaptive filtering algorithm for blind waveform estimation in diffuse multipath channels
Giuseppe Fabrizio,A. Farina +1 more
TL;DR: A new blind spatial filtering technique is proposed, referred to as the generalised estimation of multipath signals (GEMS) algorithm, which can effectively separate distributed signal modes for accurate source waveform estimation.
Proceedings ArticleDOI
Research on Fast Computation of Ambiguity Function
Zhuo Zhihai,Shan Tao +1 more
TL;DR: A novel method based on pre-weighted Zoom FFT with cascaded filter algorithm with segment processing method is proposed for minimizing the processing burden of cross-ambiguity functions without affecting performance.
Proceedings ArticleDOI
Time delay and doppler shift estimation accuracy analyses of moving targets in non-cooperative bistatic pulse radar
Ge Xianjun,Song Jie,He You +2 more
TL;DR: The simulation shows that the weak moving target can be detected effectively and the time delay and doppler shift can be fast estimated by the methods presented in this paper.
References
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Journal ArticleDOI
Algorithms for ambiguity function processing
TL;DR: The nature of the ambiguity processing is interpreted, and an algorithm approach is shown that minimizes the processing burden over a broad category of applications without affecting performance.
Journal ArticleDOI
Fast computation of the ambiguity function and the Wigner distribution on arbitrary line segments
Ahmet Kemal Ozdemir,Orhan Arikan +1 more
TL;DR: By using the fractional Fourier transformation of the time-domain signals, closed-form expressions for the projections of their auto or cross ambiguity functions are derived and efficient algorithms are proposed to compute uniformly spaced samples of the Wigner distribution and the ambiguity function located on arbitrary line segments.
Proceedings ArticleDOI
The zoom FFT using complex modulation
TL;DR: In this paper, the authors simplify the concepts of the zoom transform and remove some of the restrictions assumed by Yip; i.e., the total number of points need not be a power of 2.
Journal ArticleDOI
Computing decimated finite cross-ambiguity functions
L. Auslander,R. Tolimieri +1 more
TL;DR: A fast algorithm computing decimated finite cross-ambiguity functions is designed, which is tailored for implementation on parallel computer architectures and relies on FFT algorithms which produces greater detail.
Journal ArticleDOI
Computing the ambiguity surface
R. Tolimieri,S. Winograd +1 more
TL;DR: In the final section, approximation theory is applied directly to the problem of computing the discrete ambiguity function, and the algorithm required to carry out the necessary computations turns out to be the same as on the prevoius approximation method based on a decimating FIR filter.