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检索条件"任意字段=IEEE International Conference on Signal Processing, Communications and Computing ICSPCC 2015"

共 1362 条记录，以下是71-80 订阅

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Iterative maximum likelihood and zFlogz estimation of parameters of compound-Gaussian clutter with inverse gamma texture 8

Iterative maximum likelihood and zFlogz estimation of parame...

引用

ieee international conference on signal processing, communications and computing (icspcc)

作者： Xu, Shuwen Wang, Le Shui, Penglang Li, Xin Zhang, Jiankang Xidian Univ Collaborat Innovat Ctr Informat Sensing & Underst Natl Lab Radar Signal Proc Xian Shaanxi Peoples R China Xidian Univ Natl Lab Radar Signal Proc Xian Shaanxi Peoples R China China Res Inst Radiowave Natl Key Lab Electromagnet Environm Qingdao Peoples R China McMaster Univ Dept Elect & Comp Engn Hamilton ON Canada

ISBN: (纸本)9781538679463

Cumpound-Gaussian model with the texture of inverse gamma distribution is regarded as one of the best models to characterize the high-resolution sea clutter at low grazing angles. The model parameters are usually estimated through moments or maximum likelihood function of sample. The former one is of low precision since the using of high order moments. The latter is difficult to implement due to its high computing complexity. In this paper, a zFlogz estimator is proposed to decrease the order of moments, and an iterative maximum likelihood (ML) estimator is constructed to simplify the computation of ML estimator. The experiments based on simulated and real sea clutter data show that the proposed methods perform better than the method of moments while computing more efficiently than the ML estimator.

关键词： compound-Gaussian inverse gamma high-resolution sea clutter zFlogz maximum likelihood

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Persymmetric adaptive detection for range-spread targets in generalized Pareto sea clutter 7

Persymmetric adaptive detection for range-spread targets in ...

引用

ieee international conference on signal processing, communications and computing (icspcc)

作者： Xue, Jian Xu, ShuWen Shui, Penglang Xidian Univ Natl Lab Radar Signal Proc Collaborat Innovat Ctr Informat Sensing & Underst Xian 710071 Shaanxi Peoples R China

ISBN: (纸本)9781538631423

Adaptive detection problem of range-spread targets is investigated in generalized Pareto sea clutter. Texture component of non-Gaussian sea clutter is considered to follow inverse gamma distribution in order to match the non-Gaussian characteristic of clutter. In response to the heavy detection performance loss of adaptive detectors when the secondary data are limited, the persymmetric structure of the covariance matrix is merged into the proposed detector. The proposed adaptive detector can perform better in heavy spiky clutter. Meanwhile, experiments via exploiting simulated data and measured sea clutter data indicate that the proposed detector has superior detection performance, especially for limited secondary data.

关键词： Adaptive detection Range-spread targets Generalized Pareto clutter Persymmetric structure

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Sparse sampling based compensation method for FLAR

Sparse sampling based compensation method for FLAR

引用

2011 ieee international conference on signal processing, communications and computing, icspcc 2011

作者： Liu, Jinhui Liao, Guisheng National Laboratory of Radar Signal Processing Xidian University Xi'an Shaanxi China

ISBN: (纸本)9781457708947

A sparse sampling based compensation (SSBC) method is proposed in this letter. The complex amplitudes (CAs) of clutter scatterers, which are larger than the sampling threshold (ST), are sampled along the direction Doppler curve (DDC) of each range cell. Then, the covariance matrix of each range cell is reconstructed by using the sampled clutter scatterers to mitigate the range-dependence problem in the forward-looking airborne radar (FLAR). Finally, the computer simulation results show that the computation burden is reduced considerably by using SSBC method as well as the space-time adaptive processing (STAP) performance of FLAR is kept. © 2011 ieee.

关键词： Space time adaptive processing

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Robust space-time interpolation in presence of antenna element error for bistatic airborne radar

Robust space-time interpolation in presence of antenna eleme...

引用

2013 ieee international conference on signal processing, communications and computing, icspcc 2013

作者： Jinhui, Liu Guisheng, Liao Research Institute of Computer Peripherals Xidian University Xi'an Shaanxi China National laboratory of Radar Signal Processing Xidian University Xi'an Shaanxi China

ISBN: (纸本)9781479910274

We propose robust space-time interpolation method in presence of the antenna element error in this letter. The proposed method adds the correcting space-time steering vectors constraint around the space-time steering vector of the clutter. As a result, the proposed method can mitigate the range dependent problem in presence of the antenna element error in bistatic airborne radar system. The numerical simulation results show the effectiveness of the proposed method. © 2013 ieee.

关键词： Errors

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Reverse signal-Aligned Network Coding in Interference Channels with Limited Transmitter Cooperation 8

Reverse Signal-Aligned Network Coding in Interference Channe...

引用

ieee international conference on signal processing, communications and computing (icspcc)

作者： Chan, Tse-Tin Lok, Tat-Ming Chinese Univ Hong Kong Dept Informat Engn Hong Kong Peoples R China

ISBN: (纸本)9781538679463

In this paper, we study two-user time-varying interference channels with limited transmitter cooperation. The transmitters are connected to a central processor via wired cooperation links with individual limited capacities. The capacities of each cooperation link are just comparable to that of each link in the interference channel. We propose a reverse signal-aligned network coding (RSNC) scheme. We prove that our RSNC scheme achieves full degrees of freedom (DoF) by utilizing signal alignment and physical-layer network coding. The main idea of our RSNC scheme is that the transmitted signals are aligned at the receivers by signal alignment and the interfering signals are cancelled with each other by physical-layer network coding (PNC). This idea can be achieved by properly designing the network-coded messages conveyed from the central processor to the transmitters and the precoding matrices of the transmitters. Simulation results verify the performance of our RSNC scheme. The results also show that our scheme outperforms the orthogonal transmission scheme in the two-user case.

关键词： degrees of freedom (DoF) distributed MIMO interference alignment (IA) limited backhaul physical-layer network coding (PNC)

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Fourier Transform with the Adaptive Kernel Function to Analyze Frequency Modulation signal 7

Fourier Transform with the Adaptive Kernel Function to Analy...

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ieee international conference on signal processing, communications and computing (icspcc)

作者： Sun, Weitao Yan, Yi Wang, Huigang Liu, Xing Northwestern Polytech Univ Sch Marine Sci & Technol Xian 710072 Shaanxi Peoples R China Dalian Sci Test & Control Technol Dalian 116013 Peoples R China

ISBN: (纸本)9781538631423

The non-linear frequency modulation signal is common and significant in signal processing. In order to improve the resolution and energy of its time-frequency representation (TFR), this paper proposed a new time-frequency analysis method known as the Fourier Transform with the adaptive kernel (AK-FT). According to Weierstrass approximation theorem, nonlinearly time-varying frequency can be expressed in weighted exponential function in a continuous time. The non stationary signal is able to be transferred into the stationary one. The TFR with excellent concentration is produced through the Fourier Transform, and the accuracy of the instantaneous frequency of the non-linear frequency modulation signal is also improved. Compared with the traditional time-frequency analysis, this method can estimate the time-frequency parameters of non-linear frequency modulation signal analysis reliably and precisely.

关键词： Time-frequency analysis adaptive kernel function Taylor series

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Bayesian-based parameter estimation of Redistribution based on limited sample 7

Bayesian-based parameter estimation of Redistribution based ...

引用

7th ieee international conference on signal processing, communications and computing, icspcc 2017

作者： Xu, Shu-Wen Wang, Le National Lab. of Radar Signal Processing Collaborative Innovation Center of Information Sensing and Understanding Xidian University Xi'an710071 China

ISBN: (纸本)9781538631409

Parameters estimators for K distribution have a relatively bad performance when the size of samples is small. An estimator based on the Bayesian theory is proposed here based on the prior distribution for the shape parameter, which is obtained from the real dataset. The simulated experiments demonstrate that the proposed method has the low relative error and low root mean square deviation compared with the existing estimators based on simulated data. © 2017 ieee.

关键词： Parameter estimation

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A new adaptive time delay estimation algorithm based on MMSE criterion

A new adaptive time delay estimation algorithm based on MMSE...

引用

2013 ieee international conference on signal processing, communications and computing, icspcc 2013

作者： Liang, Qiao Hui, Zheng National Key Laboratory of Science and Technology on Blind Signal Processing Chengdu China

ISBN: (纸本)9781479910274

In this paper, we adress the problem of time delay estimation between signals received at two spatially separated sensors at low signal-to-noise ration levels. By replacing the instantaneous square error in ETDE with time mean of square error as the cost function, we develop a new adaptive time delay estimation algorithm based on MMSE criterion (MMSE-TDE). The proposed algorithm significantly improve the performance at low SNRs, while it has the same convergence speed with the traditional ETDE algorithm. Convergence analysis is given and simulation results are also included to validate the performance of the MMSE-TDE. © 2013 ieee.

关键词： Cost functions

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A new method for instantaneous frequency rate estimation of polynomial phase signal

A new method for instantaneous frequency rate estimation of ...

引用

2013 ieee international conference on signal processing, communications and computing, icspcc 2013

作者： Xu, Lingji Yang, Yixin Yang, Long School of Marine Technology Northwestern Polytechnical University Xi'an China

ISBN: (纸本)9781479910274

In order to estimate the instantaneous frequency rate (IFR) of a polynomial phase signal (PPS) with arbitrary order, a new kind of transform referred to as L-phase distribution (LPD) is defined. The principle and realization procedure of this transform are given in detail. Furthermore, we propose an iterative IFR estimation algorithm, in which successive IFR estimates are obtained from the peak of the cross L-phase distribution (XLPD), and this new method can improve the accuracy of IFR estimation for a PPS in the presence of additive noise. The results of computer simulation demonstrate the validity of the proposed method. © 2013 ieee.

关键词： Additive noise

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Decorrelation in InSAR echoes with existence of channel mismatch

Decorrelation in InSAR echoes with existence of channel mism...

引用

2011 ieee international conference on signal processing, communications and computing, icspcc 2011

作者： Yu, Jing Yang, Zhiwei Li, Xiaohua Li, Yaan College of Marine Northwestern Polytechnical University Xi'an China National Lab of Radar Signal Processing Xidian University Xi'an China

ISBN: (纸本)9781457708947

The cross-track baseline in InSAR system is very sensitive to terrain fluctuation which is widely used to retrieve the DEM. The cross-track baseline influences the coherence of the radar echoes seriously. In this paper, we analyzed the decorrelation caused by cross-track baseline and the channel mismatch respectively. And a decorrelation reduction method by means of compensating the decorrelation caused by the spatial baseline is given. Finally, simulation results verified the validity. © 2011 ieee.

关键词： Coherence Correlation Decorrelation Educational institutions Geometry InSAR Radar Receivers channel mismatch cross-track baseline decorrelation

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