Questions tagged [wireless-communication]
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74 questions
0 votes
1 answer
42 views
Wireless relay remote control not outputting power (to linear actuator) when appropriate
I'm constructing a remote controlled linear actuator system for a pair of mechanical wings. I ordered a few parts, wired everything according to the schematic for the relay, and paired the remote to ...
- 1
0 votes
0 answers
28 views
How can I get correct output by implementing Viterbi trellis to find the MLSE solution?
I am doing a task which is related to equalization. Then I have to implement the Viterbi trellis search to find the MLSE solution. But I am not getting the correct output. It would be very helpful if ...
-4 votes
1 answer
60 views
CCTV systems implementation in Cable Cars / Gondolas [closed]
Is it feasible to implement CCTV systems in Cable Cars / Gondolas?
0 votes
0 answers
29 views
GMSK with convolutional coding
I have noticed that GMSK modulation is often used along with convolutional coding as FEC. More over, I have noticed that often, the output of the convolutional encoder is not directly fed to the GMSK ...
- 101
0 votes
1 answer
92 views
Could Ukrainian drones avoid jamming by using a higher frequency, like 4 GHz?
The Russians would probably never even know it.
- 103
0 votes
1 answer
63 views
Two-Ray Ground-Reflection Model: Understanding the Difference in Phase Offsets at the Receiver
Currently, I'm trying to understand the Two-Ray Ground-Reflection Model. During my research, I came across the following simplification expressing the received power as follows (taken from Wikipedia): ...
- 3
0 votes
2 answers
135 views
Can wireless charging become more energy efficient?
I've stumbled upon a few articles saying that wireless charging takes more energy to charge something compared to the cable. Like this one. Like in the test from the article, it takes 47.33 % more ...
0 votes
1 answer
287 views
Should we use Maximal ratio combining and an equalizer together?
I have confusion on MRC (Maximal Ratio Combining) method, which I would like to clarify. An example is where I have 1 transmit antenna and 4 receive antennas. The concept of MRC is to combine all the ...
- 3
2 votes
2 answers
2k views
Why do we always use 3.8 x 10^(-3) value as Forward Error Correction (FEC) threshold?
When we want to calculate the bit error rate (BER) for any communication system, why do we always select the 3.8 x 10-3 value as Forward Error Correction (FEC) threshold? Couldn't another value be ...
- 121
0 votes
1 answer
140 views
how would I identify when and who enter through a doorway, assuming they can have part of the technology on their person
I am working on setting up a system that senses when an object goes though a door. I've seen things using lasers or induction. I have a set of objects smaller than 1 square inch. I just want to know ...
- 3
0 votes
0 answers
203 views
Real-world CQI-to-MCS and SNR-to-CQI tables?
How can I get real-world CQI-to-MCS and SNR-to-CQI tables? I am particularly looking for 5G-NR or LTE-A related tables. Can someone share any references? Edit: I had found one table for CQI-MCS ...
- 101
1 vote
1 answer
78 views
Do they sell some sort of non-"consumery" GPS trackers?
I have seen these expensive things that you can put in a moving box while moving, to keep track of your stuff in case the moving people drive away with their truck and steal it. I also see expensive ...
1 vote
0 answers
33 views
Transforming a Wireless Computer Mouse into a Wireless Switch [closed]
With no computer involved whatsoever, I want to be able to read oscillator outputs from my wireless mouse and switch an LED on a left click AND off on a right click. I have taken my mouse apart to try ...
- 11
0 votes
0 answers
25 views
Building drone transceiver module with 2 recievers onboard to switch gates ON/OFF to turn motors On/Off
I'm looking for any resource that can help me build a radio (no infrared) controlled circuit with two receivers onboard a drone. The purpose of this circuit is for research and education. Whenever ...
- 1
0 votes
1 answer
104 views
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 ...
- 1