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检索条件"任意字段=2016 IEEE Sensor Array and Multichannel Signal Processing Workshop, SAM 2016"

共 1002 条记录，以下是41-50 订阅

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Passive Angle-Doppler Profile Estimation for Narrowband Digitally Modulated Wireless signals 12

Passive Angle-Doppler Profile Estimation for Narrowband Digi...

引用

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

作者： Argyriou, Antonios Univ Thessaly Dept Elect & Comp Engn Volos Greece

ISBN: (纸本)9781665406338

In this paper, we improve estimation of the Doppler shift present in signals that originate from multiple wireless digital communication transmitters. We deploy a uniform linear array (ULA) that overhears the frequency band of interest, hence an unauthorized wireless receiver (URx), and propose an algorithm for extracting the symbol duration from the unknown modulated data. The baseband wireless modulated signal is stripped from its data-induced phase shifts, allowing us to calculate high quality estimates of the periodogram, the spectrogram, and the angle-Doppler profile. Performance results show that high quality results without artifacts from digital modulation can be obtained.

关键词： Wireless communication Wireless sensor networks Transmitters Digital modulation Estimation Symbols signal processing algorithms

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Incorporating array Nonidealities Into Adaptive Capon Beamformer for Source Tracking

Incorporating Array Nonidealities Into Adaptive Capon Beamfo...

引用

ieee 7th sensor array and multichannel signal processing workshop (sam)

作者： Costa, Mario Koivunen, Visa Aalto Univ Dept Signal Proc & Acoust SMARAD CoE FI-00076 Aalto Finland

ISBN: (纸本)9781467310710

An adaptive algorithm for azimuth-angle estimation of moving sources in the presence of array nonidealities is proposed. The method, termed unitary element-space Capon (UES-Capon) beamformer, is robust in the face of small number of snapshots and fully takes into account effects such as mutual coupling, mounting platform reflections, and sensor's misplacement errors. Unlike most of the robust beamformers available in the literature, the proposed method is based on QR-decomposition and real-valued polynomial root tracking. Furthermore, it is applicable to sensor arrays of arbitrary configuration. Numerical results using a real-world antenna array are included, illustrating the excellent performance of the proposed method, both in terms of SINR and fast adaptivity to moving sources.

关键词： capon sensor arrays Snapshots SINR Self tuning tracking

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Moving target detection of array antennas based on time reversal 11

Moving target detection of array antennas based on time reve...

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

作者： Zhang, Zhaoming Chen, Baixiao Yang, Minglei Xu, Hui Xidian Univ Natl Lab Radar Signal Proc Xian Peoples R China Xidian Univ Sch Elect Engn Xian Peoples R China

ISBN: (纸本)9781728119465

This paper develops a time reversal moving target detector based on array antennas. Time reversal utilizes the multipath effect by retransmitting the received signal containing the Doppler shift of the moving target. Two detectors are derived in both conventional and time reversal scenarios, respectively. The Monte Carlo results show that the time reversal detector significantly improves the target detection probability in multipath environments compared with the conventional detector. The increase of multipath number is helpful to improve the detection probability of time reversal detector.

关键词： time reversal moving target array antennas detection

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GENERALIZED COPRIME array CONFIGURATIONS

GENERALIZED COPRIME ARRAY CONFIGURATIONS

引用

8th ieee sensor array and multichannel signal processing workshop (sam)

作者： Qin, Si Zhang, Yimin D. Amin, Moeness G. Villanova Univ Ctr Adv Commun Villanova PA 19085 USA

ISBN: (纸本)9781479914814

A coprime array consists of two uniform linear subarrays that construct an effective difference co-array with certain desirable characteristics. In this paper, we propose a generalized coprime array concept through the compression of the interelement spacing of one constituting subarray. As such, the existing variations of coprime array and nested array structures are represented as special cases. The achievable unique lags as well as consecutive lags in the resulting virtual array are analytically expressed, and the direction-of-arrival estimation performance is examined using both the MUSIC algorithm and sparse signal reconstruction techniques.

关键词： Coprime array sparse array difference co-array direction-of-arrival estimation compressive sensing

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QoE-aware UAV flight path design for mobile video streaming in HetNet 10

QoE-aware UAV flight path design for mobile video streaming ...

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

作者： Colonnese, Stefania Carlesimo, Andrea Brigato, Lorenzo Cuomo, Francesca Sapienza Univ Rome Rome Italy

ISBN: (纸本)9781538647523

In this paper, we address the problem of devising a Quality of Experience (QoE) aware flight plan for UAV mounted Base Station within heterogeneous networks. Specifically, we propose a QoE aware flight planning algorithm leveraging the well established Q-learning approach and introducing a reward related to relevant QoE metrics. Numerical simulation results show the effectiveness of the QoE-aware learning algorithm to devise a flight path such that the UAVs mounted Base Station actually improves the QoE of the heterogeneous network users.

关键词： Quality of experience Streaming media signal processing algorithms Delays Bandwidth Path planning Unmanned aerial vehicles"

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Precoding for RadComm Systems Based on Hybrid Antenna arrays 11

Precoding for RadComm Systems Based on Hybrid Antenna Arrays

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

作者： Feng, Freddy Y. P. Huang, Lei Shenzhen Univ Sch Informat Engn Shenzhen Peoples R China

ISBN: (纸本)9781728119465

Integrated wireless communications and radar detections have so far mainly relied on phased-array (PA) antennas with only considering the beampatterns in angle domain. By applying the frequency diverse array (FDA) into radar and communications (RadComm) systems, a compact dual-functional structure of joint PA and FDA is designed. Based on the built joint PA and FDA channel models, different beamformer designs are proposed by jointly optimizing the signal-to-interference-noises of the communications and radar. Numerical simulations demonstrate the performances of both communications and the radar with the proposed approaches are over than that of the conventional PA RadComm systems.

关键词： RadComm frequency divers array joint PA and FDA

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COMPRESSIVE SENSING IN NONSTATIONARY array processing USING BILINEAR TRANSFORMS

COMPRESSIVE SENSING IN NONSTATIONARY ARRAY PROCESSING USING ...

引用

ieee 7th sensor array and multichannel signal processing workshop (sam)

作者： Zhang, Yimin D. Amin, Moeness G. Villanova Univ Ctr Adv Commun Villanova PA 19085 USA

ISBN: (纸本)9781467310710

Compressive sensing (CS) has successfully been applied to reconstruct sparse signals and images from few observations. For multi-component nonstationary signals characterized by instantaneous frequency laws, the sparsity exhibits itself in the time-frequency domain as well as the ambiguity domain. In this paper, we examine CS in the context of nonstationary array processing. We show that the spatial averaging of the ambiguity function across the array improves the CS performance by reducing both noise and cross-terms. The corresponding time-frequency distribution which is reconstructed through L-1 minimizations yields significant improvement in time-frequency signature localizations and characterizations.

关键词： array processing Compressed sensing ambiguity function bilinearity Transform

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A Game-Theoretic Approach for Energy-Efficient Detection in Radar sensor Networks

A Game-Theoretic Approach for Energy-Efficient Detection in ...

引用

ieee 7th sensor array and multichannel signal processing workshop (sam)

作者： Bacci, Giacomo Sanguinetti, Luca Greco, Maria S. Luise, Marco Univ Pisa Dipartimento Ingn Informaz I-56122 Pisa Italy

ISBN: (纸本)9781467310710

In this work, we propose a distributed power control algorithm able to capture the tradeoff between detection capabilities and power consumption for a radar sensor network. This is achieved by modeling the radar sensors as rational agents engaging in a noncooperative game in which the detection threshold and the transmit power are properly designed according to the Nash equilibrium solution. An iterative algorithm based on a best-response dynamics is proposed to achieve the equilibrium point and its performance is compared to that achieved by a uniform power allocation.

关键词： Energy efficiency

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Sparse array Beamformer Design via ADMM 12

Sparse Array Beamformer Design via ADMM

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

作者： Huang, Huiping So, Hing Cheung Zoubir, Abdelhak M. Tech Univ Darmstadt Darmstadt Germany City Univ Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9781665406338

In this paper, we devise a sparse array design algorithm for adaptive beamforming. Our strategy is based on finding a sparse beamformer weight to maximize the output signal-tointerference-plus-noise ratio (SINR). The proposed method uses the alternating direction method of multipliers (ADMM), and admits closed-form solutions at each ADMM iteration. Numerical results exhibit excellent performance of the proposed method, which is comparable to that of the exhaustive search approach.

关键词： Adaptive beamforming ADMM sparse array design output SINR

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Computation of Weight Function of 2qth Order Virtual array to Analyse the Estimation Performance 11

Computation of Weight Function of 2qth Order Virtual Array t...

引用

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

作者： Gupta, Payal Agrawal, Monika Indian Inst Technol Ctr Appl Res Elect New Delhi 110016 India

ISBN: (纸本)9781728119465

Increasing the number of sources to be processed from a given array of sensors is an important problem in sensor array signal processing and of interest to many researchers. This problem has also been tackled with the virtual array based approach where the covariance and cumulant lags provide a virtual sensor. Here, an important parameter which affects the parameter estimation accuracy and latency is weight function. The weight function is defined as the frequency of occurrence of each virtual sensor in the virtual array. We provide the close-form expression of virtual array corresponding to linear array. We have also analytically evaluated the weight function of virtual array and have also studied the effect of the weight function on parameter estimation. Simulation results show the parameter estimation accuracy is significantly improve with high weight function.

关键词： DoA estimation Non-circular signals Sparse array Virtual array Cumulants Underdetermined System Weight function Covariance Matrix

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