Questions tagged [communication]

Use this tag for non-technical questions about interpersonal communication in the engineering profession.

8 questions with no upvoted or accepted answers
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How do mobile phones switch 4G/3G/2G?

I would like to know the algorithm of switching between 4g/3g/2g. When will the phone switch from 4G to 3G or from 3G to 2G, when we select for corresponding option in the mobile phone. Is it based on ...
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0answers
19 views

Calculate the temperature stability of wavelength demultiplexer

Hi ive been given this question: A wavelength demultiplexer (DMUX) used in a DWDM communication system has a channel spacing of 100 GHz. The operating pass band of each channel is 50 GHz. The ...
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9 views

how to implement an encoder in matlab

How can I encode a quantized vector in matlab ? This is a part of a problem where I am asked to implement a communication block using matlab.
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0answers
11 views

Can channel bandwidth can transmit any VALUES of frequencies as long as they are within range

I know that channel bandwidth is the range of frequencies it can transmit . Let's say channel bandwidth is 100 Hz . Does that mean it can transmit any signal whose bandwidth is 100Hz regardless of ...
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0answers
35 views

What's the best way to get an ultrasonic sensor that can vary its operating frequency

Long story short I'm looking to build an ultrasonic sensor that can also be used to communicate with a seperate sensor. (So it must be able to send out a pitch around ~42kHz, but also alter the pitch ...
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0answers
2k views

Matlab code for a visible light communication system

I simulated a VLC system for an AWGN channel and plotted the BER against Ebno. I used the LED impulse response and convolved it with the signal produced to transmitting. But the results are not OK. It ...
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0answers
154 views

AT Commands for FTP Server Connection on SIM Modem

I am trying to connect to a FTP server on a raspberry pi and transfer a file onto the server. I am using the SIM5320A chip on a breakout module and I am having trouble getting the module to connect to ...
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1answer
33 views

Problem with railway crossing, need help!

I am looking for a solution to my real-life problem that not only affects me but also many other people. I am simplifying the problem to make it easier to understand. My daily commute to work includes ...