[SLS-OPT] O3K channel model

Wed Apr 22 07:28:21 UTC 2020

Dear Jon, 

Thanks for summarizing the channel model and the parameters' values.
In principle we are fine with them, but we would like to understand the 
motivation for having all the powers (i.e., the signal power and noise 
variances) normalized as dimensionless quantities, instead of having them 
in watts - which is probably more intuitive, at least from an engineering 
point of view. Could you please confirm that this is indeed the case and 
elaborate a bit on your choice?

Thanks a lot in advance!

Kind regards, 

Modis for ESA - European Space Agency 

Nicolò Mazzali, PhD 
Communication Systems & Technologies Engineer 

Telecommunications Section (TEC-ESC) 
Radio Frequency Systems Division (TEC-ES)
Directorate of Technology, Engineering & Quality (D/TEC)

ESTEC
Keplerlaan 1, PO Box 299
NL-2200 AG Noordwijk, The Netherlands
nicolo.mazzali at esa.int | www.esa.int
T +31 71 56 53215

From:   "Jon Hamkins via SLS-OPT" <sls-opt at mailman.ccsds.org>
To:     "SLS-OPT at mailman.ccsds.org" <SLS-OPT at mailman.ccsds.org>
Date:   15/04/2020 17:20
Subject:        [SLS-OPT] O3K channel model
Sent by:        "SLS-OPT" <sls-opt-bounces at mailman.ccsds.org>

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

JPL   |   jpl.nasa.gov [attachment "2020-04-15-O3K-channel-model.pptx" 
deleted by Nicolo Mazzali/estec/ESA] 
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