All Questions
Tagged with electrical-engineering telecommunication
43
questions
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S-Parameters and Received Power for Implant Antenna
I am simulating an implant antenna using the Ansys HFSS EM simulation tool - the simulation setup looks something like this, with a transmitting (TX) antenna of transmit power $P_{TX}$ and transmit ...
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1
answer
48
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What is the best way to enhance an existing LTE signal on a mountain hut?
I'm traveling to a mountain hut in Austria every year which is in the middle of nowhere. If you're lucky you can sometimes get one bar and a weak Long-Term Evolution (LTE) or Edge connection for a few ...
- 3
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1
answer
79
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Faraday's law applied to a coil in an electromagnetic field
According to Faraday's law,
we have the law:
where "e" is the electromotive force which is equal to the derivative of the phase of the vector "b" through the surface s of the loop ...
0
votes
3
answers
335
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Rotary Phones vs Pushbutton -- why did we ever have rotary?
I remember when we first got pushbutton phones -- I would say user experience is literally ten times better -- if you used a rotary phone extensively as part of your job, you would rapidly develop a ...
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2
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72
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Demodulation of AM signals in radio broadcast systems
I have a question regarding the demodulation of AM signals in radio systems (like car radio).
I know that in order to send the audio signal from the broadcasting station to users we need first to AM ...
- 11
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47
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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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1
answer
70
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How to make a wireless modem using a normal Wi-Fi router and a 4g usb modem
I have a normal TP link (Model: TL-WR841N) router and an USB 4g modem. But the WIFI router does not have any USB port. I want to connect the USB modem with the router, want to share internet ...
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1
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46
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Ethernet extender kit claims to send data through power cables - Is this correct?
I own an ethernet extender kit which has two devices connected to mains. Its data sheet claims that the device "your homes electrical wiring to extend your broadband network anywhere in the house&...
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12
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Monitoring Connectivity on ZigBee
I am trying to figure out some ways in which a ZigBee network can be monitored. As is the case in any network, here we have a central coordinator and several slaves joined, however, there seems to be ...
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2
votes
3
answers
927
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Bandwidth vs Capacity
Two questions on wireless transmission, packed into one.
First: I am confused about the meaning of the term 'Bandwidth' in a wireless transmission environment. The two most common definitions I could ...
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1
vote
1
answer
39
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Fourier serie signal approximation
I have to approximate the red function with Fourier harmonics.
I am calculating complex Ck the following way.
I am not sure what to put for period - T (6 or 2pi or what?). What integral limits to ...
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1
answer
105
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Electronic symboles in datasheets
I found these symbols in a electronic datasheet.. Are these all logic gates? or another?
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0
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32
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Mobile Frequency and Carrier Frequency not Matching
I am using a Google Nexus 6 Mobile in India with Airtel as Network Provider. Recently Airtel has upgraded their Network to 2300 Mhz 4G. Whereas Google Nexus 6 Operates on Band 3 (1800Mhz) LTE.
When ...
2
votes
0
answers
182
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Negative transmit power in dBm
I am calculating the transmit power for $K$ single antenna IoT devices in an Indoor scenario. The receiver has 64 antennas. I am trying to minimize the transmit sum-power, i.e., $\sum_k p_k$, where $...
2
votes
1
answer
232
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What is tonal masking?
I have checked the definition of tonal masking on Wikipedia and google but I saw the definition of sound masking and auditory masking.
Auditory masking
Sound masking
But I want to know what ...
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