A wide dynamic range receiver channel for a pulsed time-of-flight laser radar

Ruotsalainen, T.; Palojarvi, P.; Kostamovaara, J.

doi:10.1109/4.938373

Cited by 86 publications

(54 citation statements)

References 18 publications

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“…Because of a narrow linear range of the channel the linear detection needs some sort of a gain control circuit to prevent the pulse from clipping and to achieve a wide dynamic range [4,5]. Another possibility is to make the unipolar to bipolar signal conversion at the front-end of the channel where the linear range is wider.…”

Section: Timing Discriminatormentioning

confidence: 99%

An Integrated Laser Radar Receiver Channel with Wide Dynamic Range

Nissinen

Kostamovaara

2007

2007 14th IEEE International Conference on Electronics, Circuits and Systems

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A Receiver channel for a pulsed time-of-flight laser rangefinder is presented. It operates in a wide dynamic range without gain control. This is achieved by using leading edge detection and the generated walk error is corrected by measuring the slew rate of the pulse. In this way the compensation can be continued after the pulse is clipped so that the residual walk error can be minimized. Simulations show that a single-shot precision of 125 ps, or 20 mm in distance, is achievable within a dynamic range of at least 1:10,000.

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Section: Timing Discriminatormentioning

confidence: 99%

An Integrated Laser Radar Receiver Channel with Wide Dynamic Range

Nissinen

Kostamovaara

2007

2007 14th IEEE International Conference on Electronics, Circuits and Systems

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“…(1) One beam is focused by a convergent lens and is detected directly by a photo detector [30]. Because the beam undergoes no noise interference and it keeps the original stand waveform, it is suitable to regard the peak position of the laser pulse as the start timing moment for a timer in FPGA.…”

Section: Principlementioning

confidence: 99%

A Novel De-Noising Method for Improving the Performance of Full-Waveform LiDAR Using Differential Optical Path

et al. 2017

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A novel de-noising method for improving the performance of full-waveform light detection and ranging (LiDAR) based on differential optical path is proposed, and the mathematical models of this method are developed and verified. Backscattered full-waveform signal (BFWS) is detected by two avalanche photodiodes placed before and after the focus of the focusing lens. On the basis of the proposed method, some simulations are carried out and conclusions are achieved.(1) Background noise can be suppressed effectively and peak points of the BFWS are transformed into negative-going zero-crossing points as stop timing moments. (2) The relative increment percentage of the signal-to-noise ratio based on the proposed method first dramatically increases with the increase of the distance, and then the improvement gets smaller by increasing the distance. (3) The differential Gaussian fitting with the Levenberg-Marquardt algorithm is applied, and the results show that it can decompose the BFWS with high accuracy. (4) The differential distance should not be larger than c/2 × τ rmin , and two variable gain amplifiers can eliminate the inconsistency of two differential beams. The results are beneficial for designing a better performance full-waveform LiDAR.

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“…These techniques have resulted in cm-level accuracy in a wide range of pulse amplitude echoes, e.g., in a range of 1:10 000. 6,[9][10][11][12][13][14][15][16] The purpose of this work is to experimentally show that in addition to these well-known timing walk error sources, the laser driving scheme also affects the timing walk. More specifically, it is shown that an avalanche driver, which is typically used for high-speed/high-power driving of semiconductor laser diodes, also introduces a relatively slowly rising current component to the high-speed switching current.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the leading-edge timing walk in pulsed TOF laser range finding with avalanche bipolar junction transistor (BJT) and metal-oxide-semiconductor (MOS) switch based laser diode drivers

Hintikka

Hallman

Kostamovaara

2017

Review of Scientific Instruments

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Timing walk error in pulsed time-of-flight based laser range finding was studied using two different types of laser diode drivers. The study compares avalanche bipolar junction transistor (BJT) and metal-oxide-semiconductor field-effect transistor switch based laser pulse drivers, both producing 1.35 ns current pulse length (full width at half maximum), and investigates how the slowly rising part of the current pulse of the avalanche BJT based driver affects the leading edge timing walk. The walk error was measured to be very similar with both drivers within an input signal dynamic range of 1:10 000 (receiver bandwidth of 700 MHz) but increased rapidly with the avalanche BJT based driver at higher values of dynamic range. The slowly rising part does not exist in the current pulse produced by the metal-oxide-semiconductor (MOS) based laser driver, and thus the MOS based driver can be utilized in a wider dynamic range.

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A wide dynamic range receiver channel for a pulsed time-of-flight laser radar

Cited by 86 publications

References 18 publications

An Integrated Laser Radar Receiver Channel with Wide Dynamic Range

An Integrated Laser Radar Receiver Channel with Wide Dynamic Range

A Novel De-Noising Method for Improving the Performance of Full-Waveform LiDAR Using Differential Optical Path

Comparison of the leading-edge timing walk in pulsed TOF laser range finding with avalanche bipolar junction transistor (BJT) and metal-oxide-semiconductor (MOS) switch based laser diode drivers

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