Biosignals from a biophysics perspective/signal distortion during transmission

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Signal distortion during transmission[edit | edit source]

As we showed at the end of the paragraph on the calibration signal, in a real situation, during the passage of the signal through the system, changes usually occur such that the dependence of the output signal y(t) on the input signal x(t) is more complex than can be expressed by the simple linear relation (1), or by the relation

y(t) = A. x(t) + C (30)

which differs from relation (1) only by the additive constant C, representing the shift of the output signal from the zero position (shift).

In the case of more complex dependencies than relations (1) or (30), we speak of distortion of the signal during transmission.

A distorting amplifier or loudspeaker can cause us a lot of inconvenience, but there are also cases where such distortion can be beneficial. Since the output signal is somehow indicative of the path it must have taken, we will be interested in how we can get some information out of it, i.e. how to use the passing signal to diagnose a system such as the neural pathway in the human brain. Therefore, we will stop for a moment with the concept of system.


Reference[edit | edit source]

Source[edit | edit source]

  • HEŘMAN, Petr. Biosignály z pohledu biofyziky. 1. edition. Praha : Petr Heřman – DÚLOS, 2006. 64 pp. 

Recommended literature[edit | edit source]

  • AMLER, Evžen, et al. Praktické úlohy z biofyziky I. 1. edition. Praha : Praha: Ústav biofyziky 2. lékařské fakulty UK, 2006. 
  • HRAZDIRA, Ivo. Biofyzika :  učebnice pro lékařské fakulty. 2. edition. Praha : Avicenum, 1990. ISBN 80-201-0046-6.
  • KHAN, M. I. Gabriel. EKG a jeho hodnocení. 1. edition. Praha. 2005. ISBN 80-247-0910-4.
  • KOMÁREK, Vladimír, et al. Dětská neurologie. 1. edition. Praha : Galén, 2008. ISBN 80-7262-492-8.
  • ROSINA, Jozef, et al. Lékařská biofyzika. 1. edition. Praha : Manus, 2000. 0 pp. ISBN 80-902318-5-3.
  • NAVRÁTIL, Leoš – ROSINA, Jozef, et al. Biofyzika v medicíně. 1. edition. Praha : Manus, 2003. 398 pp. ISBN 8086571033.
  • NAVRÁTIL, Leoš – ROSINA, Jozef, et al. Medicínská biofyzika. 1. edition. Praha : Grada, 2005. ISBN 80-247-1152-2.


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