[SLS-OPT] O3K channel model

Dirk.Giggenbach at dlr.de Dirk.Giggenbach at dlr.de
Fri Apr 17 14:25:08 UTC 2020

Hi Jon,

we do not have data APD-RFEs for that low rate which we could test/measure.
I checked some datasheets, the one coming closest to 1.22Mbps is the LaserComponents IAG350H1D –APD Receiver with 1MHz Bandwidth and 350µm APD.  They don’t show dark current in the DS.

These values seem close to best compared to other receivers:
Responsivity=94MV/W  ,  I guess that includes Amplification of M=10, so TIA would be ~9MOhm
NEP=32fW/sqrt(Hz)   -   referred noise density of 0.3E-12 A/sqrt(Hz)  or  3µV/sqrt(Hz)

Hope that helps,


Von: SLS-OPT [mailto:sls-opt-bounces at mailman.ccsds.org] Im Auftrag von Jon Hamkins via SLS-OPT
Gesendet: Mittwoch, 15. April 2020 17:20
An: SLS-OPT at mailman.ccsds.org
Betreff: [SLS-OPT] O3K channel model

Attached is the O3K channel model we discussed yesterday.  It also contains a suggestion for how to state the O3K coding performance.  I welcome your comments.  If we can agree to the model in the next week or so, each agency may be able to begin simulating with it and discuss some initial results at the May teleconferences.

A few notes:

  *   I am suggesting we study 10 Gsps, 78.125 Msps, and 1.22 Mbps, since those include the highest and lowest data rates and one in the middle.
  *   I don't have a good suggestion for the TIA noise density at 1.22 Msps.  Dirk, would you be able to supply a number?
  *   I have algebraically simplified the expressions for the means and variances.  You can compare the model to the expressions Dariush presented on yesterday (p. 5), and check my algebra.
  *   I have included the fading parameter as well.  Just set rho=1 if you want no fading.

Jon Hamkins
Lead Technologist
33   |   Communications, Tracking, and Radar Division
O 818-354-4764   |   M 626-658-6220

JPL   |   jpl.nasa.gov
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