A comparative study of model selection criteria for the number of signals

Chen, Pinyuen; Wu, Ta Jen; Yang, Juan

doi:10.1049/iet-rsn:20070102

Cited by 38 publications

(11 citation statements)

References 12 publications

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“…On the other hand, applying MUSIC presupposes knowledge of the exact number of targets. In real-world environments, where more objects beside the two overhead lines may be existing, additional estimating techniques could be required [10,11]. Even further signal processing as, for example, tracking of the overhead contact lines or range gating could be implemented to discriminate the overhead contact lines from other targets [12].…”

Section: Measurement Resultsmentioning

confidence: 99%

Detection of Overhead Contact Lines with a 2D-Digital-Beamforming Radar System for Automatic Guidance of Trolley Trucks

Harter

Schipper

Zwirełło

et al. 2013

International Journal of Vehicular Technology

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The benefit of trolley truck systems is the substitution of the diesel fuel by the cheaper and more ecological electrical energy. Trolley trucks are powered by electricity from two overhead contact lines, where one is the supply and the other the return conductor. Such trolley trucks are used for haulage at open pit mining sites but could also be used for freight traffic at roadways in the future. Automatic guidance prevents the trolley-powered trucks from leaving the track and thus allows higher operating speeds, higher loading capacity, and greater efficiency. Radar is the ideal sensing technique for automatic guidance in such environments. The presented radar system with two-dimensional digital beamforming capability offers a compact measurement solution as it can be installed on top of the truck. Besides the distance measurement, this radar system allows to detect the location and inclination of the overhead contact lines by digital beamforming in two dimensions. Besides automatic guidance, the knowledge of the inclination of the overhead contact lines could allow automatic speed adaption, which would help to achieve maximum speed especially in hilly terrain.

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Section: Measurement Resultsmentioning

confidence: 99%

Detection of Overhead Contact Lines with a 2D-Digital-Beamforming Radar System for Automatic Guidance of Trolley Trucks

Harter

Schipper

Zwirełło

et al. 2013

International Journal of Vehicular Technology

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“…However, they show unsatisfactory performance in the SNR range below 5 dB when the number of targets is unknown. Correct detection of the number of sources is a major issue, as in [20] and [21] MUSIC and ESPRIT, for high-resolution parameter estimation. Thus, the number of sources is generally assumed to be known when the MUSIC or ESPRIT algorithm is simulated as in [22].…”

Section: Introductionmentioning

confidence: 99%

Low-Complexity Range-Azimuth FMCW Radar Sensor Using Joint Angle and Delay Estimation Without SVD and EVD

Lee

2015

IEEE Sensors J.

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A low complexity range-azimuth frequencymodulated continuous-waveform (FMCW) radar sensor using joint angle and delay estimation method without singular value decomposition (SVD) and eigenvalue decomposition (EVD) is presented in this paper. Conventional joint angle and delay estimation techniques exploit the dual-shift-invariant structure of received signals through matrix decompositions, such as SVD and EVD, which increases the computational burden. The proposed method utilizes the dual-shift-invariant structure through matrix inversion and performs angle and delay estimation using extended one-dimensional pseudospectrum searching instead of two-dimensional pseudospectrum searching to reduce the computational complexity. We demonstrate the effectiveness of the proposed method through Monte-Carlo simulations. The proposed algorithm is also verified by processing real FMCW data collected in an anechoic chamber.

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“…In many cases, the source number provided by special source number detection methods [8][9][10][11] is underestimated or overestimated. When the source number is underestimated, some signal eigenvectors are mixed in the noise subspace.…”

Section: Introductionmentioning

confidence: 99%

“…Different from other methods which focus on improving the calibration performance [15][16][17], source number estimating accuracy [8][9][10][11] and resolution of close signals in the snapshot deficient scenario [5,6], our purpose is to develop methods with high resolution and robustness in the presence of unknown source number, array error, snapshot deficient and low SNR. In [20], we have developed a simple but high resolution DOA estimating method with unknown source number, suitable for the snapshot deficient and low SNR scenario.…”

Section: Introductionmentioning

confidence: 99%

Modified Doa Estimation Methods With Unknown Source Number Based on Projection Pretransformation

Zhou¹,

Gao²,

Wang³

et al. 2012

PIER B

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Abstract-In this paper, our purpose is to develop methods that have high resolution and robustness in the presence of unknown source number, array error, snapshot deficient, and low SNR. The DOA (Direction-Of-Arrival) estimation with unknown source number methods referred as MUSIC-like and SSMUSIC-like methods have shown high resolution in the snapshot deficient and low SNR scenario. However, they need to take several times of fine search on the full space, which bring about high computational complexities. Thus, modified methods are proposed to reduce computational complexities and improve performances further. In the modified methods, we priori use conventional beamforming to get the rough distribution of signals' angle, which helps to reduce computational complexity and connect the technique of projection pretransformation. Then through projection pretransformation, original methods are further simplified and improved. As demonstrated in computer simulations, the modified DOA estimation with unknown source number methods shows not only higher resolution in the snapshot deficient and lower SNR scenario, but also more robustness against array errors. Although the proposed methods cannot replace the array calibration completely, they reduce the requirement of calibration accuracy. Combined with these advantages, it has been shown that the new methods are more suitable in engineering.

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A comparative study of model selection criteria for the number of signals

Cited by 38 publications

References 12 publications

Detection of Overhead Contact Lines with a 2D-Digital-Beamforming Radar System for Automatic Guidance of Trolley Trucks

Detection of Overhead Contact Lines with a 2D-Digital-Beamforming Radar System for Automatic Guidance of Trolley Trucks

Low-Complexity Range-Azimuth FMCW Radar Sensor Using Joint Angle and Delay Estimation Without SVD and EVD

Modified Doa Estimation Methods With Unknown Source Number Based on Projection Pretransformation

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