UWB LNAs for ground penetrating radar

Robens, Markus; Wunderlich, Ralf; Heinen, Stefan

doi:10.1109/iscas.2009.5117727

Cited by 8 publications

(18 citation statements)

References 4 publications

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“…1 [13]. A feedback shift register is clocked by a reference oscillator at a single tone f c , to generate the M-sequence.…”

Section: M-sequence Radar Principlesmentioning

confidence: 99%

“…More than 70% of the signal power is concentrated at frequencies below f c /2. Thus, limiting operation to frequencies below this value does not impair the performance significantly [13]. On the other hand, this restriction allows for sampling at f c without aliasing, as the Nyquist condition is kept.…”

Section: M-sequence Radar Principlesmentioning

confidence: 99%

“…Because the M-sequences are periodic, the A/D conversion can be performed even at a lower rate given by the binary divider ratio. A complete set of data samples can be gathered during successive signal periods as long as the scene under test can be assumed to be time invariant [13]. The impulse response of the scene under test is calculated as the correlation between known transmitted M-sequence and received signal by the DSP block.…”

Section: M-sequence Radar Principlesmentioning

confidence: 99%

“…More on the Msequence sensing principles can be found in [11]. [13] The main advantages of this concept are constant amplitude without peaks coming hand-in-hand with efficient time usage in terms of power, high immunity to interference and simplicity as well as versatility of the system which includes low number of analogue circuits. For example, the frequency band and therefore the resolution of the whole M-sequence radar can be set solely by the clock source frequency thanks to the wideband design of the device components in the form of application specific integrated circuits (ASICs).…”

Section: M-sequence Radar Principlesmentioning

confidence: 99%

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M-Sequence Ground-Penetrating Radar With Novel Front-End Concept

Pecovsky¹,

Galajda²,

Slovak³

et al. 2018

AEI

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“…1 [13]. A feedback shift register is clocked by a reference oscillator at a single tone f c , to generate the M-sequence.…”

Section: M-sequence Radar Principlesmentioning

confidence: 99%

Section: M-sequence Radar Principlesmentioning

confidence: 99%

Section: M-sequence Radar Principlesmentioning

confidence: 99%

Section: M-sequence Radar Principlesmentioning

confidence: 99%

See 2 more Smart Citations

M-Sequence Ground-Penetrating Radar With Novel Front-End Concept

Pecovsky¹,

Galajda²,

Slovak³

et al. 2018

AEI

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“…Due to its co-simulation capability, different possibilities do exist in ADS Ptolemy to accurately reflect the LNA behavior. Since we implemented different amplifier versions for this system in the past [14], [15], [16], one way would be a transient-TS DF co-simulation. This kind of simulation is supported by models [14] has been used.…”

Section: System Simulationmentioning

confidence: 99%

System simulation for M-sequence radar sensors

Robens

Wunderlich

Heinen

et al. 2012

2012 International Conference on Indoor Positioning and Indoor Navigation (IPIN)

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Capabilities of M-sequence radar front-ends have been shown in the past. For further system enhancement, specifi cations of constituent components can be re-aligned using system simulation. In this article, we want to present a system simulation setup for Agilent's Advanced Design System (ADS) which allows us to assess the impact of individual components on typical radar parameters. The latter characterize the performance of the overall system and it is their optimization which is targeted. For this purpose, new ADS stars, i.e. components for the (timed) synchronous dataflow (TSDF) simulator, have been implemented. Appropriate antenna models have been identified from literature and the signal deformations they impose are clearly visible from the simulated impulse response. Thus, simulations help to determine the antenna type suitable for the application. Due to the multiple signal domain simulation ability of ADS Ptolemy, it can be switched from a pure model based simulation to a transient-TSDF co-simulation during the design process. Using an appropriate channel model, such simulations provide a good estimate of real system performance right in advance to the actual component implementation and they help to keep track of real components agreement with the predicted behavior. Thus, a fair amount of flexibility is added in the design process compared to the former real-circuit component based approach.Keywords-M-sequence radar system; system simulation; sys tem parameters; co-simulation I. IN TRODUCTIONApplication of ultra-wideband (UWB) sensor devices has been reported for a couple of localization tasks. Those tasks profit from high range resolution and range accuracy, which results from the large bandwidth of excitation signals in UWB systems. Range resolution characterizes the ability to distinguish adjacent scatterers or interfaces in range direction.According to narrowband radar theory, this quantity is directly related to the inverse of bandwidth. Range accuracy, i. e. the capability to precisely detect the position of a certain interface, in addition is affected by noise. Though, according to [1], the analytic models used to describe these relationships require some refinement when UWB signals are focused, the underlying principles remain valid even in the UWB case.To a certain extent, UWB signals are also robust against multipath propagation. In [2], for example, time of arrival estimation for signals in a multipath environment is examined and compared to other time of arrival estimation techniques. At a reasonable signal to noise ratio (SNR), estimation techniques proposed in this publication perform well under line-of-sight and non-Iine-of-sight conditions while they require only low computational complexity. 978-1-4673-1954-6/12/$31.00 ©2012 IEEE Some applications take advantage of lower frequencies, which are part of the UWB stimulation spectrum. Related signal portions might enter or pass through non-metallic materials and thus provide information on the material itself or the area behind. In [3], thr...

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