Range bias modeling for hyperbolic frequency modulated waveforms in target tracking

Song, Xiufeng; Willett, Peter; Zhou, Shengli

doi:10.1109/sam.2012.6250480

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…Consequently, for such IDTs both the electrode and gap centers' positions must be determined and only then electrode's width with a fixed metallization ratio can be calculated. In the first approximation, the electrode and the positions of gap centers are determined from the required impulse response s(t) which corresponds to ideal theoretical HFM waveforms such as [13], where the signal acquires pure real and imaginary values (signal phase is k and 2…”

Section: Design Of Hfm Transducersmentioning

confidence: 99%

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Initial Design and Quick Analysis of SAW Ultra–Wideband HFM Transducers

Janeliauskas¹,

Markevičius²,

Navikas³

et al. 2017

RADIOENGINEERING

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Abstract. This paper presents techniques for initial design and quick fundamental and harmonic operation analysis of surface acoustic waves ultra-wideband hyperbolically frequency modulated (HFM) interdigital transducer (IDT KeywordsSurface acoustic wave (SAW), hyperbolically frequency modulated waveforms (HFM), interdigital transducer (IDT), quasi-static method, Chebyshev polynomial approximation, Green's function, interdigital chirp filter, harmonics' operation

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Section: Design Of Hfm Transducersmentioning

confidence: 99%

“…Based on the HFM waveforms instantaneous frequency -time dependence presented in [13], the instantaneous frequency delay of the ideal HFM signal is expressed as…”

Section: Evaluation Of Hfm Transducer Characteristicsmentioning

confidence: 99%

Initial Design and Quick Analysis of SAW Ultra–Wideband HFM Transducers

Janeliauskas¹,

Markevičius²,

Navikas³

et al. 2017

RADIOENGINEERING

View full text Add to dashboard Cite

show abstract

“…2) Doppler Compensation Using Chirps With Hyperbolic Frequency Modulation: In [44], it is shown that hyperbolicfrequency modulated (HFM) chirps have an optimal modulation property or Doppler invariance which was already derived in [45] and [46]. The HFM chirp is given by…”

Section: ) Doppler Compensation Of An Lfm Signalmentioning

confidence: 99%

Robust Acoustic Positioning for Safety Applications in Underground Mining

Pfeil¹,

Pichler

Schuster

et al. 2015

IEEE Trans. Instrum. Meas.

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The surroundings of underground mining machines still constitute an unsafe area for miners due to bad visibility conditions. In this paper, we present a novel acoustic position estimation system for safety applications in such hazardous environments. Our system is based on a pulse compression technique and utilizes linear (LFM) and hyperbolic (HFM) frequency-modulated signals in the frequency range of 5-20 kHz. As the miners are moving, we incorporated a means of Dopplershift compensation. This system not only provides the positions of moving targets but also their velocity and direction. In stationary measurements, we evaluated LFM signals at noisy conditions both in an indoor laboratory environment and in the vicinity of a mining machine. The movement of a miner has been emulated in dynamic laboratory measurements at constant speeds up to 1 m/s using both LFM and HFM signals. Our results show that the acoustic signal can be evaluated down to a low signal-to-noise ratio of −30 dB. The results of the dynamic measurements clearly demonstrate the insensitivity of the HFM signals to Doppler-shifts both with regard to the estimated position and estimated velocity.

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“…During the past decades, specialists and scholars have made huge contributions to the research on the cross ambiguity function (CAF) [1][2][3], especially in the presence of Gaussian noise. A linear canonical transform was introduced to ambiguity function for the time-frequency analysis of the cubic phase signal in [4].…”

Section: Introductionmentioning

confidence: 99%

A Robust Joint Estimation Method of Time Delay and Doppler Frequency Shift

Yu¹,

Niu²,

Zhang³

2018

dtcse

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Abstract. In this paper, a novel concept, the Sigmoid transform based cyclic correlation, is proposed and a relative estimator named the Sigmoid transform based cyclic cross-ambiguity function is also derived to handle the joint estimation problem in the presence of impulsive noise and co-channel interference. Based on these definitions, a novel joint estimation method of the time delay and the Doppler frequency shift is proposed. Simulations have verified its superior performances over existing methods based on cyclic ambiguity function or generalized fractional lower-order cyclic cross-ambiguity function, especially under impulsive noise. Meanwhile, it is more applicable for practical applications since it is parameter-free.

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Range bias modeling for hyperbolic frequency modulated waveforms in target tracking

Cited by 5 publications

References 22 publications

Initial Design and Quick Analysis of SAW Ultra–Wideband HFM Transducers

Initial Design and Quick Analysis of SAW Ultra–Wideband HFM Transducers

Robust Acoustic Positioning for Safety Applications in Underground Mining

A Robust Joint Estimation Method of Time Delay and Doppler Frequency Shift

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