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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.

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How can I construct a 4-ary symmetric communication channel in Matlab?

I need to construct a symmetric channel over the alphabet {0,1,2,3} similar to Matlab's Binary Symmetric Channel. I need the probability of transmission error to be p/3 and the probability of successful transmission to be (1-p) for 0 I have not…
Darren
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Is there any way to differentiate between wlan and lan packets? That means how to know whether the packet is over wifi or lan (wire)?

I am using wire-shark packet sniffer but I am unable to differentiate the packets over wifi and over LAN (wire)
PravinY
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MIMO channel with CSI in MATLAB

I am now doing a MATLAB for calculating the capacity of a MIMO channel with CSI. Therefore, I need to use water filling to have the power level....but I have some problem that the result graph is concave downward. can anyone give me some suggesting…
user3301157
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Mimic 3G network traffic of selected telco operator

Currently, I need to perform some network communication with a mobile gateway. The mobile gateway is expecting 3G network traffic of selected telco operator. I was wondering, is there any I can mimic such traffic from my laptop? Or, from my 3G…
Cheok Yan Cheng
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asterisk 11.6 "core show channels" output

In asterisk 11.6, if we execute the command "core show channels" we are getting the following output. DAHDI/i/callerid-sequence_number But I want the output like the below format ( older version ) DAHDI/- I am…
RoCkStUnNeRs
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frequency demodulation in matlab

how can i do frequency demodulation in matlab i have already done frequency modulation, but i can't do frequency demodulation this is matlab code clear all close all recorder = audiorecorder(44100,16,1); recordblocking(recorder,2); xtmessage =…
user3088987
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Predicting/calculating congestion in telecom network

I have an application installed at my phone which is providing below details every minute: - Bandwidth , -Packet loss ,-signal strength,- RTT for google.com every minute. I am trying to predict congestion based on these 4 attribute , but some how…
Jain Rach
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Matlab Integration in a loop

I am working in matlab the M-QAM modulation with Rayleigh fading, and i have a little problem with the integration part, i have made that code with an aproximation: function y = m_qam_ray( M ) %UNTITLED4 Summary of this function goes here % …
Merck
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To find FM signal's phase in Matlab

I want to find the phase of an FM signal. Matlab code of message signal is m= ones(1,Fs); m= [m(1:round(.4*Fs))*1, m(round(.4*Fs)+1:round(.7*Fs))*-2 ... m(round(.7*Fs)+1:Fs)*0]; How can I find phase of FM signal?
user2979746
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SMS via SMPP: How to determine number of parts in multipart sms

Im' sending sms messages via EasySmpp library (http://sourceforge.net/projects/easysmpp/). In case of messages over 160 characters long it internally uses data_sm command. The question is how can I determine number of parts of sms message that…
Marcin
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Mobile Value Added Service, MVAS protocols

I study the construction of mobile networks and began to study MVAS. But could not find a specific iinformation what protocols are used in the VAS or MVAS. I understood that main protocol using SMS - it SMPP.   It would be great if someone made ​​a…
user2598277
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converting a string to unicode in c on linux platform

I need to convert the string to utf-8. How this can be done on linux platfom. Suppose string is "c3aa" it should be encoded to "ê". As i need it to implement it for vcard My vcard string contains…
user2843171
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Not able to decode vcard which contains french characters?

I need to encode =C3=AA=74=65=64 string but not getting the correct characters as sent from…
user2843171
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How to find BLER for corresponding SNR in Matlab

I have 100 SNR (signal to noise ratio), …
user2663126
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how actually tcp protocol works?

So i started to learn tcp/ip protocol stack. But in all sources tcp protocol is described too blurry. The main think i want to know how actually tcp protocol programly implemented. how applyed protocols communicate with tcp protocol. what is…
Oleksandr Papchenko
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