# Flexible Numerology scenario **URL:** \ **Category:** Vienna 5G Link Level Simulator\ **Created:** [April 24, 2023, 3:30pm UTC](https://vccsforum.nt.tuwien.ac.at/t/flexible-numerology-scenario/238 "2023-04-24T15:30:30Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Mohamed](https://vccsforum.nt.tuwien.ac.at/letter_avatar_proxy/v4/letter/m/d78d45/32.png) [@Mohamed](https://vccsforum.nt.tuwien.ac.at/u/Mohamed)\ **Post date:** [April 24, 2023, 3:30pm UTC](https://vccsforum.nt.tuwien.ac.at/t/flexible-numerology-scenario/238/1 "2023-04-24T15:30:30Z")
Dear Sir, \*\*When I tried to run flexibleNumerology scenario using main.m script, I got an error in the case of using 15kHz subcarrier spacing. \*\* **I changed the parameter in the scenario like that:** % numerology setup: to obtain the three different numerologies, change the following parameters as shown in the inline comments scStr.modulation.numberOfSubcarriers = [384]; % 384, 96, 48 scStr.modulation.subcarrierSpacing = [15e3]; % 15e3, 60e3, 120e3 scStr.modulation.nSymbolsTotal = [14]; % 14, 56, 112 scStr.modulation.nGuardSymbols = [1]; % 1, 4, 8 scStr.schedule.fixedScheduleDL{1} = [‘UE1:384’]; % [‘UE1:384’], [‘UE1:96’] or [‘UE1:48’] **I got the following error message** : Warning: For fully digital precoding the number of port is set equal to the number of antennas > In Parameters/SimulationParameters/checkParameters (line 317) > In Parameters.SimulationParameters (line 30) > In main (line 25) > The sampling rate was set to 11.700000 MHz. > Sampling rate does not match the predefined delays of the channel model! > Delay taps are changed according to (top = desired value; bottom = chosen value): > 1.0e-06 \* Columns 1 through 9 ``` 0 0.0172 0.0181 0.0264 0.0207 0.0242 0.0302 0.0259 0.0343 0 0 0 0 0 0 0 0 0 ``` Columns 10 through 18 ``` 0.0692 0.0854 0.1001 0.0977 0.1122 0.1130 0.1376 0.1836 0.2006 0.0855 0.0855 0.0855 0.0855 0.0855 0.0855 0.1709 0.1709 0.1709 ``` Columns 19 through 23 ``` 0.2056 0.2158 0.2253 0.2387 0.4346 0.1709 0.2564 0.2564 0.2564 0.4274 ``` Warning: For fully digital precoding the number of port is set equal to the number of antennas > In Parameters/SimulationParameters/checkParameters (line 317) > In Parameters/SimulationParameters/UpdateSweepValue (line 1196) > In main (line 26) > Sampling rate does not match the predefined delays of the channel model! > Delay taps are changed according to (top = desired value; bottom = chosen value): > 1.0e-06 \* Columns 1 through 9 ``` 0 0.0172 0.0181 0.0264 0.0207 0.0242 0.0302 0.0259 0.0343 0 0 0 0 0 0 0 0 0 ``` Columns 10 through 18 ``` 0.0692 0.0854 0.1001 0.0977 0.1122 0.1130 0.1376 0.1836 0.2006 0.0855 0.0855 0.0855 0.0855 0.0855 0.0855 0.1709 0.1709 0.1709 ``` Columns 19 through 23 ``` 0.2056 0.2158 0.2253 0.2387 0.4346 0.1709 0.2564 0.2564 0.2564 0.4274 ``` ------- Started ------- Warning: The temporary variable ‘signalLength’ will be cleared at the beginning of each iteration of the parfor-loop. If ‘signalLength’ is used before it is set, a runtime error will occur. For more information, see Parallel for Loops in MATLAB, “Uninitialized Temporaries”. > In main (line 52) > Warning: The temporary variable ‘primaryLink’ will be cleared at the beginning of each > iteration of the parfor-loop. If ‘primaryLink’ is used before it is set, a runtime error will > occur. For more information, see Parallel for Loops in MATLAB, “Uninitialized Temporaries”. > In main (line 52) > Warning: For fully digital precoding the number of port is set equal to the number of antennas > Warning: For fully digital precoding the number of port is set equal to the number of antennas > Warning: For fully digital precoding the number of port is set equal to the number of antennas > Warning: For fully digital precoding the number of port is set equal to the number of antennas > Warning: For fully digital precoding the number of port is set equal to the number of antennas > Warning: For fully digital precoding the number of port is set equal to the number of antennas > In Parameters/SimulationParameters/checkParameters (line 317) > In Parameters/SimulationParameters/UpdateSweepValue (line 1196) > In parallel\_function\>make\_general\_channel/channel\_general (line 837) > In remoteParallelFunction (line 67) > Sampling rate does not match the predefined delays of the channel model! > Delay taps are changed according to (top = desired value; bottom = chosen value): > 1.0e-06 \* Columns 1 through 17 ``` 0 0.0172 0.0181 0.0264 0.0207 0.0242 0.0302 0.0259 0.0343 0.0692 0.0854 0.1001 0.0977 0.1122 0.1130 0.1376 0.1836 0 0 0 0 0 0 0 0 0 0.0855 0.0855 0.0855 0.0855 0.0855 0.0855 0.1709 0.1709 ``` Columns 18 through 23 ``` 0.2006 0.2056 0.2158 0.2253 0.2387 0.4346 0.1709 0.1709 0.2564 0.2564 0.2564 0.4274 ``` Warning: Pilot pattern is LTE Downlink like, but not standard compliant for a number of 13 symbols per slot! > In ChannelEstimation.PilotSymbolAidedChannelEstimation (line 134) > In Parameters/SimulationParameters/initializeLinks (line 1948) > In parallel\_function\>make\_general\_channel/channel\_general (line 837) > In remoteParallelFunction (line 67) > Warning: For fully digital precoding the number of port is set equal to the number of antennas > Error using ChannelEstimation.PilotSymbolAidedChannelEstimation > Size inputs must be integers. Error in Parameters.SimulationParameters/initializeLinks (line 1948) ChannelEstimator = ChannelEstimation.PilotSymbolAidedChannelEstimation( … Error in main (line 52) parfor iSweep = 1:length(simParams.simulation.sweepValue) % this may be ‘for’ or ‘parfor’ **Please tell me how to run this case without an error.** \*\*Note : \*\* **I use MATLAB 2022b and The Vienna 5G Link Level Simulator v1.3** ---
**Author:** ![Mariam](https://vccsforum.nt.tuwien.ac.at/letter_avatar_proxy/v4/letter/m/b9e5f3/32.png) [@Mariam](https://vccsforum.nt.tuwien.ac.at/u/Mariam)\ **Post date:** [April 25, 2023, 11:46am UTC](https://vccsforum.nt.tuwien.ac.at/t/flexible-numerology-scenario/238/2 "2023-04-25T11:46:30Z")
Dear Mohamed, The pilot pattern causes this issue. You have two options: - Change the pilot pattern for the DL to Diamond - Change nSymbolsTotal to 15 Best, Mariam ---
**Author:** ![Mohamed](https://vccsforum.nt.tuwien.ac.at/letter_avatar_proxy/v4/letter/m/d78d45/32.png) [@Mohamed](https://vccsforum.nt.tuwien.ac.at/u/Mohamed)\ **Post date:** [April 26, 2023, 7:32am UTC](https://vccsforum.nt.tuwien.ac.at/t/flexible-numerology-scenario/238/4 "2023-04-26T07:32:09Z")
Dear Mariam, Thank you very much for your reply. The two options are already working. I tried to run the flexible Numerology scenario for different subcarrier spacing, it worked very well when I simulate for one subcarrier spacing each time. When I tried to use flexible Numerology scenario to simulate two different subcarriers using two base stations and two user equipment. unfortunately, I did not get curves as expected for the two users. Please, tell me where is the problem. I changed the parameter in the scenario like that: scStr.topology.nodes = [‘BS1,BS2,UE1,UE2’]; scStr.topology.primaryLinks = [‘BS1:UE1,’ … ‘BS2:UE2,’ ]; scStr.simulation.pilotPatternDownlink = ‘Diamond’; scStr.modulation.numberOfSubcarriers = [384,96]; scStr.modulation.subcarrierSpacing = [15e3,60e3]; scStr.modulation.nSymbolsTotal = [15,60]; scStr.modulation.nGuardSymbols = [1,4]; scStr.schedule.fixedScheduleDL{1} = [‘UE1:384’]; scStr.schedule.fixedScheduleDL{2} = [‘UE2:96’]; Best Regards, Mohamed ---
**Author:** ![Mariam](https://vccsforum.nt.tuwien.ac.at/letter_avatar_proxy/v4/letter/m/b9e5f3/32.png) [@Mariam](https://vccsforum.nt.tuwien.ac.at/u/Mariam)\ **Post date:** [April 27, 2023, 9:03am UTC](https://vccsforum.nt.tuwien.ac.at/t/flexible-numerology-scenario/238/5 "2023-04-27T09:03:57Z")
Dear Mohamed, You get a throughput of zero because the interference is too high. You have to reduce the interference by increasing the interferer attenuation ‘topology.interferer.attenuation’. Best, Mariam