Comparison of the noise immunity of a LED-based multiband optoelectronic sensor when using FDMA and CDMA to code the excitation source

Author

Boukadoum, Mounir ; Tabari, Karima ; Bensaoula, Abdelhak ; Starikov, David

Author_Institution

Dept. of d´´Inf., Quebec Univ., Montreal, Que., Canada

Volume

2

fYear

2004

fDate

6-9 Dec. 2004

Firstpage

1089

Abstract

We compare the noise immunity of the LED-based optoelectronic front end of a multiband spectral detection and analysis device when using FDMA and CDMA coding for the excitation source. Our results are that the two coding schemes offer comparable performance at low signal-over-noise levels, but that the CDMA approach offers a much better noise immunity in noisy environments. It is thus a much better alternative to drive the excitation source than the more common synchronous modulation approach that underlines FDMA.

Keywords

analogue-digital conversion; code division multiple access; field programmable gate arrays; fluorescence; frequency division multiple access; light emitting diodes; modulation coding; spectral analysis; CDMA coding; FDMA coding; LED based multiband optoelectronic sensor; analogue-digital conversion; excitation source; field programmable gate arrays; fluorescence; multiband spectral analysis device; multiband spectral detection device; noise immunity; noisy environment; synchronous modulation method; Bandwidth; Colored noise; Detectors; Fluorescence; Frequency division multiaccess; Immune system; Light emitting diodes; Multiaccess communication; Noise level; Optoelectronic and photonic sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on

Print_ISBN

0-7803-8660-4

Type

conf

DOI

10.1109/APCCAS.2004.1413073

Filename

1413073