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检索条件"任意字段=2010 IEEE Sensor Array and Multichannel Signal Processing Workshop, SAM 2010"

共 1026 条记录，以下是81-90 订阅

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PARAMETRIC BOOTSTRAPPING OF array DATA WITH A GENERATIVE ADVERSARIAL NETWORK 11

PARAMETRIC BOOTSTRAPPING OF ARRAY DATA WITH A GENERATIVE ADV...

引用

ieee 11th sensor array and multichannel signal processing workshop (sam)

作者： Gerstoft, Peter Groll, Herbert Mecklenbrauker, Christoph F. Univ Calif San Diego La Jolla CA 92093 USA TU Wien Inst Telecommun A-1040 Vienna Austria

ISBN: (纸本)9781728119465

Since the number of independent array data snapshots is limited by the availability of real-world data, we propose a parametric bootstrap for resampling. The proposed parametric bootstrap is based on a generative adversarial network (GAN) following the generative approach to machine learning. For the GAN model we chose the Wasserstein GAN with penalized norm of gradient of the critic with respect to its input (wGAN_gp). The approach is demonstrated with synthetic and real-world ocean acoustic array data.

关键词： generative adversarial network GAN sample covariance matrix DOA estimation Hellinger distance

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sampling in the Graph signal processing Companion Model 13

Sampling in the Graph Signal Processing Companion Model

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13rd ieee sensor array and multichannel signal processing workshop (sam)

作者： Shi, John Moura, Jose M. F. Carnegie Mellon Univ Elect & Comp Engn Pittsburgh PA 15213 USA

ISBN: (纸本)9798350344820;9798350344813

The classic DSP sampling property: "(Uniform) sampling of a bandlimited signal leads to (perfect) replication in the spectral domain." does not hold in the vertex Graph signal processing (GSP) model. sampling uniformly in GSP does not lead to perfect replicas, but rather distorted replicas [1]. In [2], we introduced a Step 1-Step 2 Companion Model Method, S2CM2, as a way to introduce new GSP concepts. The GSP companion model is closest to the DSP time model (with different boundary conditions), making it easier to extend DSP concepts. In this paper, we consider GSP sampling in the companion model. We show that GSP sampling theory in the companion model is similar to DSP sampling theory by illustrating the four sampling steps: Subsampling, Decimation, Upsampling, Interpolation, in the companion model.

关键词： signal sampling

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A Performance-Weighted Blended Dominant Mode Rejection Beamformer 10

A Performance-Weighted Blended Dominant Mode Rejection Beamf...

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10th ieee sensor array and multichannel signal processing workshop (sam)

作者： Buck, John R. Singer, Andrew C. Univ Massachusetts Dartmouth ECE Dept Dartmouth MA 02747 USA Univ Illinois ECE Dept Urbana IL 61801 USA

ISBN: (纸本)9781538647523

Adaptive beamformers operating in snapshot deficient situations often estimate regularization parameters such as the diagonal loading level or the signal subspace dimension. We propose a new beamformer that avoids this problem by computing its array weights as a mixture of the array weights for a set of beamformers. The new beamformer's average output power asymptotically approaches the best performance of any of the beamformers in the set. Applying this technique to the Dominant Mode Rejection (DMR) beamformer obviates the need to estimate the dominant signal subspace dimension. An example simulation of a complicated passive sonar scenario illustrates that the blended beamformer's performance rivals the performance of the best fixed subspace DMR beamformer, and may outperform all of them in nonstationary environments.

关键词： Power generation sensor arrays array signal processing Direction-of-arrival estimation Adaptation models Loading"

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Voice activity detector for microphone array processing in hand free systems

Voice activity detector for microphone array processing in h...

引用

2nd ieee sensor array and multichannel signal processing workshop

作者： Krasny, L Oraintara, S Ericsson Inc Res Triangle Pk NC USA

ISBN: (纸本)0780375513

This paper describes the use of voice activity defector (VAD) in microphone array processing for hand-free systems. Two different types of VAD are proposed using conventional and adaptive beamforming. Taking into account the fact that the speech signal is not present at all time in human conversations, both signal of interest and noise can be better estimated. Simulation results show that the VAD significantly improves the performance of the array processing algorithms. The performances of the two types of VAD are also compared in the paper.

关键词： array processing

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Combining Artificial and Natural Background Noise in Personal Audio Systems 10

Combining Artificial and Natural Background Noise in Persona...

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10th ieee sensor array and multichannel signal processing workshop (sam)

作者： Wallace, Daniel Cheer, Jordan Univ Southampton Inst Sound & Vibrat Res Southampton Hants England

ISBN: (纸本)9781538647523

Personal audio systems are designed to deliver spatially separated regions of audio to individual listeners. This paper presents a method for improving the privacy of such systems. The level of a synthetic masking signal is optimised to provide specified levels of intelligibility in the bright and dark sound zones and reduce the potential for annoyance of listeners in the dark zone by responding to changes in ambient noise. Results from a simulated personal audio system indicate that less acoustic contrast is required to produce the same level of privacy when artificial masking is included in the system design, compared with relying on the masking effect of background noise alone. As privacy requirements become more challenging, the advantage gained by incorporating artificial masking increases.

关键词： Noise measurement Audio systems Privacy Psychoacoustics array signal processing"

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Joint User Selection and Hybrid Analog-Digital Beamforming in Massive MIMO Systems 10

Joint User Selection and Hybrid Analog-Digital Beamforming i...

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10th ieee sensor array and multichannel signal processing workshop (sam)

作者： Hegde, Ganapati Pesavento, Marius Tech Univ Darmstadt Commun Syst Grp Darmstadt Germany

ISBN: (纸本)9781538647523

In this paper, we consider a multi-user massive MIMO network with hybrid beamforming architecture at the base station. The objective is to jointly perform user selection and design analog-digital hybrid beamformers in order to maximize a given utility function while satisfying various pertinent constraints. The problem is combinatorial and impractical to solve optimally for a large system. In order to overcome the problem we develop a low-complexity heuristic algorithm. We propose a novel metric to judiciously select a predefined number of appropriate users and to pick congruent analog beamformers from a given dictionary based on the sparse regression techniques. Complementary digital beamformers are then designed for the selected users and fixed analog beamformers. Through simulations we analyze the performance of the proposed technique and compare it with the performance of standard techniques.

关键词： array signal processing Dictionaries Radio frequency Linear programming MIMO communication signal to noise ratio Interference"

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Identical Partitioning of Consecutive Integer Set 13

Identical Partitioning of Consecutive Integer Set

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13rd ieee sensor array and multichannel signal processing workshop (sam)

作者： Zhang, Yimin D. Sun, Shunqiao Temple Univ Dept Elect & Comp Engn Philadelphia PA 19122 USA Univ Alabama Dept Elect & Comp Engn Tuscaloosa AL 35487 USA

ISBN: (纸本)9798350344820;9798350344813

In this paper, we develop a scheme to partition a one- or multi-dimensional consecutive integer number set into multiple identical, possibly rotated, subsets. The proposed technique first exploits one-dimensional nested subsets, and the results are extended to achieve two- and multi-subset partitioning as well as in two- and multi-dimensional spaces. The number of consecutive lags in each case is examined. The results are useful to various sensing and communication applications, and sparse step-frequency waveform design for range estimation in automotive radar is demonstrated as an example.

关键词： integer set partition multi-dimensional partition sparse array sparse waveform design automotive radar

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Non-Coherent Source Localization with Distributed sensor array Networks 12

Non-Coherent Source Localization with Distributed Sensor Arr...

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ieee 12th sensor array and multichannel signal processing workshop (sam)

作者： Wan, Zhengyu Liu, Wei Willett, Peter Univ Sheffield Dept Elect & Elect Engn Sheffield S Yorkshire England Univ Connecticut Dept Elect & Comp Engn Storrs CT USA

ISBN: (纸本)9781665406338

The non-coherent source localization problem based on distributed sensor arrays can be formulated into a group sparsity based phase retrieval problem where only the magnitude (absolute value) of the received signals is available. Under such a framework, a two-dimensional localization method is proposed. Unlike traditional source localization methods, random phase errors at sensors of the distributed array will not affect estimation results by the proposed method. Simulation results indicate that the proposed non-coherent source localization method outperforms the traditional one in the presence of large phase errors, while still maintains an acceptable accuracy in the absence of phase errors.

关键词： Target localization distributed sensor array magnitude-only measurements group sparsity non-coherent detection

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Robust Adaptive Beamforming for Coprime array Based on Interference Power Estimation via Subspace 11

Robust Adaptive Beamforming for Coprime Array Based on Inter...

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ieee 11th sensor array and multichannel signal processing workshop (sam)

作者： Sun, Sicong Ye, Zhongfu Zhu, Xingyu Univ Sci & Technol China Natl Engn Lab Speech & Language Informat Proc Hefei 230027 Peoples R China

ISBN: (数字)9781728119465

ISBN: (纸本)9781728119465

Compared with uniform linear array (ULA), the coprime array can obtain larger array aperture with the same number of physical sensors, which leads to higher spatial resolution and less effect of mutual coupling. Also, the degrees of freedom (DOFs) can be increased by reconstructing the sampling covariance matrix (SCM) in virtual array domain. In this paper, we propose a robust adaptive beamforming (RAB) algorithm based on coprime array. A novel subspace based method is performed in virtual array domain to estimate the power and direction of arrival (DOA) of interference, which also obtains the ability for DOFs enhancement. Simulation results demonstrate the robustness and effectiveness of the proposed method.

关键词： robust adaptive beamforming coprime array degrees of freedom covariance matrix reconstruction virtual array

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Analog Beamformer Design for Interference Exploitation based Hybrid Beamforming 10

Analog Beamformer Design for Interference Exploitation based...

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10th ieee sensor array and multichannel signal processing workshop (sam)

作者： Hegde, Ganapati Masouros, Christos Pesavento, Marius Tech Univ Darmstadt Commun Syst Grp Darmstadt Germany UCL Dept Elect & Elect Engn London England

ISBN: (纸本)9781538647523

Hybrid analog-digital beamforming has been shown to reduce hardware cost and power consumption in massive MIMO systems, at the expense of increased radiated power for given performance targets. To alleviate the above shortfall, in this paper we exploit the concept of constructive interference (CI) that has been shown to offer significant radiated power savings in fully-digital multi-user downlink MIMO systems. We explore analog beamforming design, and develop solutions specifically tailored for CI-based hybrid beamforming. We also evaluate the performance of the presented techniques and their computational complexities using simulation results.

关键词： array signal processing Radio frequency Antennas sensor arrays Conferences MIMO communication"

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