Questions tagged [telecommunication]
Telecommunication domain relates to wireless standards like GSM, GPRS, UMTS, LTE, WiMAX, IEEE 802.11. Programming questions related to 1G,2G,3G,4G,5G Cellular Communication can be asked here.
telecommunication
328
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Does SM-DP+ has access to MNO specific keys in the eSIM realm?
As you know in the eSIM realm, for the customer model, SM-DP+ is responsible for loading the MNO provided profile into the eSIM chip; and, after loading such profile, the final end-user, can ...
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I want to connect to my SIM card virtually so I can dial USSD code
I have a SIM that I want to connect to my server so that I can be sending some USSD to the SIM from my application without relying on third party services. All information would be highly appreciated.
...
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Connection to The Things Network whit LR-FHSS
Context
I'm currently trying to connect to TTN whit LR-FHSS modulation, this is suppose to be supported by the Things Stack (Check that here), I'm using a LR1110 (this DevKit), using the LoRaWAN 1.0.4,...
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How can we determine whether a SIM-Swap has occurred within a specific timeframe (hours/days/etc.) for a mobile user (MSISDN)?
In the context of SIM-Swap functionality, I'm seeking a method to extract the following details from DIAMETER messages interfacing with the HSS, or any network interface that offers such information:
...
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46
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MIMO channel Shannon Capacity
How do i add the capacity of a MIMO link with NR=2 and NT=4
clear all
clc
%Shannon capacity
snr=0;
for i = 1:10
snr = snr +2;
c=(log(1+10^(snr/10)))/log(2);
x(i)=snr;
y(i)=c;
...
0
votes
0
answers
24
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Understanding Required Parameters for Implementing a Root Raised Cosine (RRC) Filter in MATLAB
I'm currently working on implementing a Root Raised Cosine (RRC) filter in MATLAB for decoding Tetra signals recorded with a PN9 sequence. As part of this process, I'm trying to understand how to ...
0
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0
answers
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BladeRF Setup: Srsenb Tx and Rx always 0
After building srsLTE from source referring from this article(https://hernan.de/blog/creating-a-cellular-testbed-with-yatebts-and-srslte/).When we run srsepc and srsenb the Tx and Rx values are always ...
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0
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How to find the SNRb for the given error propabillity?
I am trying to solve this problem: 16-QAM system and want to find the SNRb in order the error propabillity to be Pb=10^-3, given the following(showed in the picture below) useful functions
I am trying ...
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Understanding Digit Repetition in Phone Numbers
I am currently working on a project that requires validation of phone numbers, and I'm curious about the potential repetition of a single digit within a phone number. In a typical phone number, how ...
0
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1
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Matlab 256-Qam Inphase values remains at -15 whiles the Quadrature values change
I have a vector of integers I am parsing a qam modulator in matlab using the qammod command, however I noticed when i plot the graph the quadrature part changes but the in-phase part remains at -15. ...
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Is there a way to send A2P SMS messages from a NodeJS app to users without a third party SMS gateway like Twilio?
Telecom n00b here, veteran software engineer. If there is another stackexchange that is more appropriate for this question, lmk.
I've built an interactive SMS based app in Nodejs that functions ...
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218
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MATLAB Code for a shadowed rician fading channel
Hello I'm having some trouble understanding how to make a shadowed rayleigh fading channel
like the above picture.
What I'm trying to do is making a channel model where
Q = Q_los +Q_nlos where Q_los ...
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0
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Why is the phase negative in the APSK trigonometric notation, but positive in the constellation diagram?
Let's write a trigonometric record of QAM:
If I=1 and Q=1, then the phase in the cosine will be equal to -pi/4, since the arctangent will be equal to pi/4. At the same time, this point is located in ...
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0
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CGrateS - passing account's balance to GrantedUnit (4g)
I am using the latest version of CGrateS for my billing system and using open5gs for core system.
When updating sessions we reply with a GrantedUnit which is some constant.
For example, imagine an ...
0
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0
answers
95
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Android 11 - setting RNCallkeep.setCurrentCallActive(uuid) causes the native call state to update in self Managed mode, but it should not
Android 11 - setting RNCallkeep.setCurrentCallActive(uuid) causes the native call state to update in self Managed mode, but it should not
I am using react-native-callkeep
library to handle my VOIP ...
