Digital Signal Processor (DSP) based 1/fα noise generator

R. Mingesz, P. Bara, Z. Gingl, P. Makra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

1/f noise is present in several natural and artificial systems, and even though it was discovered several years ago, it is still not completely understood. Due to the lack of an universal model, the main methods of investigating a system where 1/f noise is present are numerical simulations and real measurements. The second method can lead to more adequate results, since it is free from numerical artifacts. In the case of real measurements, we need reliable, wide-band noise generators. Many ways of generating noise are known; most of them have several limitations on the frequency bandwidth or on spectral properties. We wanted to create a device which is easy to use, which can generate any kind of 1/f α noise and whose bandwidth is wide enough to make our investigations. We used a DSP (ADSP2181) to numerically generate the desired noise, and a D/A converter to convert it to an analogue signal. The noise generation algorithm was based on the known method of filtering a Gaussian white noise with a series of first-order digital filters. We enhanced this method to get a better spectral shape and to compensate for the side effects of the digital-to-analogue conversion.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsL.B. White, C.N. Georghiades, M.H. Hoffmann, L. Pradell
Pages38-47
Number of pages10
Volume5473
DOIs
Publication statusPublished - 2004
EventNoise in Communication - Maspalomas
Duration: May 26 2004May 27 2004

Other

OtherNoise in Communication
CityMaspalomas
Period5/26/045/27/04

Fingerprint

noise generators
Noise generators
Digital signal processors
central processing units
Bandwidth
White noise
Digital to analog conversion
Digital filters
Computer simulation
analogs
bandwidth
digital filters
white noise
converters
artifacts
broadband

Keywords

  • 1/f noise
  • Digital filter
  • DSP
  • Noise generator

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Mingesz, R., Bara, P., Gingl, Z., & Makra, P. (2004). Digital Signal Processor (DSP) based 1/fα noise generator. In L. B. White, C. N. Georghiades, M. H. Hoffmann, & L. Pradell (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 5473, pp. 38-47) https://doi.org/10.1117/12.547110

Digital Signal Processor (DSP) based 1/fα noise generator. / Mingesz, R.; Bara, P.; Gingl, Z.; Makra, P.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / L.B. White; C.N. Georghiades; M.H. Hoffmann; L. Pradell. Vol. 5473 2004. p. 38-47.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mingesz, R, Bara, P, Gingl, Z & Makra, P 2004, Digital Signal Processor (DSP) based 1/fα noise generator. in LB White, CN Georghiades, MH Hoffmann & L Pradell (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 5473, pp. 38-47, Noise in Communication, Maspalomas, 5/26/04. https://doi.org/10.1117/12.547110
Mingesz R, Bara P, Gingl Z, Makra P. Digital Signal Processor (DSP) based 1/fα noise generator. In White LB, Georghiades CN, Hoffmann MH, Pradell L, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 5473. 2004. p. 38-47 https://doi.org/10.1117/12.547110
Mingesz, R. ; Bara, P. ; Gingl, Z. ; Makra, P. / Digital Signal Processor (DSP) based 1/fα noise generator. Proceedings of SPIE - The International Society for Optical Engineering. editor / L.B. White ; C.N. Georghiades ; M.H. Hoffmann ; L. Pradell. Vol. 5473 2004. pp. 38-47
@inproceedings{80db78355cbc43a991b0814c69800809,
title = "Digital Signal Processor (DSP) based 1/fα noise generator",
abstract = "1/f noise is present in several natural and artificial systems, and even though it was discovered several years ago, it is still not completely understood. Due to the lack of an universal model, the main methods of investigating a system where 1/f noise is present are numerical simulations and real measurements. The second method can lead to more adequate results, since it is free from numerical artifacts. In the case of real measurements, we need reliable, wide-band noise generators. Many ways of generating noise are known; most of them have several limitations on the frequency bandwidth or on spectral properties. We wanted to create a device which is easy to use, which can generate any kind of 1/f α noise and whose bandwidth is wide enough to make our investigations. We used a DSP (ADSP2181) to numerically generate the desired noise, and a D/A converter to convert it to an analogue signal. The noise generation algorithm was based on the known method of filtering a Gaussian white noise with a series of first-order digital filters. We enhanced this method to get a better spectral shape and to compensate for the side effects of the digital-to-analogue conversion.",
keywords = "1/f noise, Digital filter, DSP, Noise generator",
author = "R. Mingesz and P. Bara and Z. Gingl and P. Makra",
year = "2004",
doi = "10.1117/12.547110",
language = "English",
volume = "5473",
pages = "38--47",
editor = "L.B. White and C.N. Georghiades and M.H. Hoffmann and L. Pradell",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

}

TY - GEN

T1 - Digital Signal Processor (DSP) based 1/fα noise generator

AU - Mingesz, R.

AU - Bara, P.

AU - Gingl, Z.

AU - Makra, P.

PY - 2004

Y1 - 2004

N2 - 1/f noise is present in several natural and artificial systems, and even though it was discovered several years ago, it is still not completely understood. Due to the lack of an universal model, the main methods of investigating a system where 1/f noise is present are numerical simulations and real measurements. The second method can lead to more adequate results, since it is free from numerical artifacts. In the case of real measurements, we need reliable, wide-band noise generators. Many ways of generating noise are known; most of them have several limitations on the frequency bandwidth or on spectral properties. We wanted to create a device which is easy to use, which can generate any kind of 1/f α noise and whose bandwidth is wide enough to make our investigations. We used a DSP (ADSP2181) to numerically generate the desired noise, and a D/A converter to convert it to an analogue signal. The noise generation algorithm was based on the known method of filtering a Gaussian white noise with a series of first-order digital filters. We enhanced this method to get a better spectral shape and to compensate for the side effects of the digital-to-analogue conversion.

AB - 1/f noise is present in several natural and artificial systems, and even though it was discovered several years ago, it is still not completely understood. Due to the lack of an universal model, the main methods of investigating a system where 1/f noise is present are numerical simulations and real measurements. The second method can lead to more adequate results, since it is free from numerical artifacts. In the case of real measurements, we need reliable, wide-band noise generators. Many ways of generating noise are known; most of them have several limitations on the frequency bandwidth or on spectral properties. We wanted to create a device which is easy to use, which can generate any kind of 1/f α noise and whose bandwidth is wide enough to make our investigations. We used a DSP (ADSP2181) to numerically generate the desired noise, and a D/A converter to convert it to an analogue signal. The noise generation algorithm was based on the known method of filtering a Gaussian white noise with a series of first-order digital filters. We enhanced this method to get a better spectral shape and to compensate for the side effects of the digital-to-analogue conversion.

KW - 1/f noise

KW - Digital filter

KW - DSP

KW - Noise generator

UR - http://www.scopus.com/inward/record.url?scp=4344658873&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4344658873&partnerID=8YFLogxK

U2 - 10.1117/12.547110

DO - 10.1117/12.547110

M3 - Conference contribution

AN - SCOPUS:4344658873

VL - 5473

SP - 38

EP - 47

BT - Proceedings of SPIE - The International Society for Optical Engineering

A2 - White, L.B.

A2 - Georghiades, C.N.

A2 - Hoffmann, M.H.

A2 - Pradell, L.

ER -