Exchange of information between devices. Communication can be wired or wireless.

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24 views

What does UE stand for in LTE network?

I have faced to several articles about LTE networks, which have used from the word UE, but they have not defined it. I have surfed the Internet, but there was not any clue for that (or I did not find ...
1
vote
0answers
47 views

Simple Two wire SPI communication between two PIC24s

I am trying to achieve a simple SPI communication of 16-bit data from a PIC24FJ64GA002 to another of the same microcontroller. By following the data sheet to the word, I wrote the transmitter and ...
0
votes
1answer
50 views

Cell phone detector circuit design [on hold]

This circuit I found on the internet detects mobile frequencies that transmit to the base station in the range of (0.9 to 3 GHZ). I want to understand how can I get or calculate the values of some ...
2
votes
3answers
243 views

How to read a push-pull output

I recently came across a sensor that had a "push-pull" output. I can't find anywhere how to read such an output: Is it some particular kind of analog output? I would want to read it with the ...
0
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1answer
32 views

Comparison of data transfer between different bandwidths

Which of the following can transfer more data [bps] 10Hz bandwidth over 2s 20Hz bandwidth over 1s It looks like its the same bps but I'm not sure.
0
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0answers
24 views

Passing sensor data from Arduino Uno R3 to android with USB Serial

I would like to know how would it look like to receive data on Android from DHT11 sensor which is connected to Arduino Uno R3 via USB Serial? I was trying some code examples for Arduino but i got a ...
1
vote
1answer
74 views

PIC to PIC serial communication

I need to send all port info from one pic to another using serial port.. currently using 9600bps baud rate. on pic18f4550 running at 20mhz clock. i have used this code to send and receive data of a ...
0
votes
0answers
14 views

GSM ZTE MG2639 module freezes after checking SIM

I'm communicating with my ZTE MG2639 module through UART. Few seconds after powering it and getting +CPIN and +STKPCI it just turns off (goes to stand by mode) It only happens with SIM card, and ...
1
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2answers
53 views

Differential Manchester Encoding

I am trying to understand Differential Manchester Encoding. The way I understand it is that the representation depends on the previous bit. If the previous bit was 0 there is a transition, but if it ...
0
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0answers
8 views

Serial communication between Android and Arduino - cannot recieve data correctly [migrated]

I'm attempting to send a single char command from my Android app to an Arduino Uno R3, and then receive data from a sensor based on which command is read. I've ...
0
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0answers
39 views

Amplitude modulation circuit explanation

I am currently doing an amplitude modulation experiment and I am using the following circuit: I need to know the effect of the various components regards to amplitude modulation. And also what is ...
0
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0answers
12 views

Will grid tie inverter and powerline communications affect each other

Since grid tie inverters "conform" their power to match the frequencies of a home, would powerline computer communications such as this router be affected by or affect a grid tie inverter?
0
votes
1answer
61 views

I wish to use ADSL protocol for my Project, can someone help me please? [closed]

I would like to use ADSL protocol for my application which involves Master-Slave communication between devices. I have done it with Ethernet(ENC28J60). I would like to now if it is possible to ...
1
vote
2answers
32 views

What is the exact difference between SGMII and 1000Base-X?

I was wondering what the exact difference between SGMII and 1000Base-X is, because both seem very similar. Is the "big" difference only the physical medium they are supposed to be transmitted on? Both ...
0
votes
2answers
83 views

Long Range Arduino Water Monitoring

I'm looking for advice on how I should setup a long range irrigation monitoring system using multiple Arduino boards. I would like advice/options available on what hardware I require to achieve my ...
1
vote
3answers
125 views

How does the automatic garage door opener know which button I've pushed on the wall control panel?

The wired wall control panel in my garage has only 2 wires connected to it. Yet somehow it acts different when I push the big "door" button than when I push the "light" button or the "lock" button. ...
3
votes
3answers
247 views

High Altitude Balloon Communication

Our team is planning to make a HAB (High Altitude Ballon) project for our university. We are planning to use XBee pro 868 RF modules (we are in Europe so we can not use 900 MHz band). We have to ...
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0answers
55 views

Difference between bitrate and data rate?

What is the difference between bitrate and data rate? Are both related to sending speed (not considering whether they are received correctly or not)?
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votes
1answer
68 views

What is data rate? [closed]

What is the definition of data rate? What is the unit of it? Is it related to successful bits?
1
vote
1answer
64 views

40% Channel Utilization on 1Mb Satellite

Using the Slide Window technique, consider a satellite channel with: 500 byte frames sends 270 ms delay on send and receive 1 Mbps rate communication protocol is Sliding-windows Ignore the length ...
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vote
2answers
59 views

How does a teleprinter work?

How in detail does a teleprinter system work? I am aware that many teleprinter used the Baudot code to relate alpha-numeric symbols to a sequence of 5 bits. What is the mechanical means by which a ...
0
votes
1answer
42 views

How can the Nyquist theorem for the maximum bit-rate of a noiseless channel be derived?

I've been given the formula: $$ I = 2* H * log_2(L)$$ where: \$ I \$ = Maximum data rate in bits per second for a noiseless channel \$H\$ = Bandwidth that the channel will carry (that is, the range ...
0
votes
0answers
18 views

A closed form for calculating shaping gain

As we know, in a communication system, we can divide the overall gain into coding gain and shaping gain, but I have not seen any closed form formula for calculating shaping gain, but the definition ...
0
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0answers
4 views

How to connect Arduino Pro Mini with PC? [migrated]

I'm about to buy Arduino Pro Mini (http://arduino.cc/en/Main/ArduinoBoardProMini). As far as I can see it requires FTDI or similar circuit to program it. Should FTDI be present for communication with ...
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1answer
56 views

Communication between 3 Atmega controllers

I am studying a bio chemistry analyzer, in which there are Main controller, printer board controller and detector board. To establish communication between these three, RxD pin of one controller is ...
2
votes
1answer
64 views

AVR USART wait for AVR's reponse to continue text stream

AVR USART wait for AVR's reponse to continue protocol I am doing a senior project, and I need to send a large text file line by line to an AVR (atmega32) which will control a piano using ~36 ...
1
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2answers
48 views

Making a program that sends data to USB port [closed]

I want to create a program that is able to communicate to the USB port on my laptop. From this program I want to send data to the USB port constantly. Basically something like a hyperterminal, but ...
0
votes
0answers
85 views

Transferring data from FPGA to PC (new to FPGAs)

FPGA beginner here. I have a Basys2 FPGA board(i code in verilog) and i wish to make it communicate with my PC. Currently it receives data from a slave device and stores it in an 64 bit register. ...
2
votes
0answers
44 views

Home made passive tablet pen

I have an old wacom tablet at home, its really big and I'd like to use it but I've lost the pen for it. It uses pens with passive LC circuitry. The board creats an EM-field (I can see it on my ...
0
votes
1answer
47 views

Low-Voltage DC Power Line Communication IC

I am wondering whether someone can recommend/suggest an integrated solution for Power Line Communication over low-voltage (4.5V-18V DC), short distance (<20m) wires. Discrete solutions involve a ...
1
vote
1answer
62 views

EM MWD Gap Sub Telemetry Theory Explanation in Drilling Applications

I have been doing an extensive amount of reading on EM (Electromagnetic) Telemetry in MWD (Measurement While Drilling) applications. From my reading, there are a few considerable gaps in my ...
3
votes
2answers
82 views

TTL Long Distance Transmission Alternatives

I am working on a system that gets data from a sensor via a TTL connection. Currently, the data that is gathered from the sensor is sent to another part of the system via a set of modems. The ...
0
votes
0answers
17 views

Variance of background thermal noise wireless communications?

I am new to this forum and hope I can get some help. I have been reading a paper on wireless communications, in this paper a base station with power P=25 is serving a certain user. The user is ...
0
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0answers
33 views

2 wire (Ground/Power/Data) for low power systems

I'm looking for suggestions on a low power system that provides power, data and ground over 2 wires. It also needs to support multi-drop and star network topologies. I've found HART, which is close, ...
1
vote
1answer
57 views

RS232 Splitter Capable of Transmitting/Receiving data to one device and only Transmitting to another

I was wondering if it is possible to have a RS232 splitter that is able to split the data into two RS232 connections, and allow for one of the connects to still be able to transmit data back through ...
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2answers
89 views

square wave carrier signal

I am having some trouble to put things together into one picture. Can a modulated carrier wave be a square wave? If yes then How? Because at resonant frequency at the transmitter, the current ...
0
votes
3answers
131 views

How to increase range of zigbee?

I have a Zigbee Pro with Arduino whose range is 2 miles as per specifications. But practically its maximum range is only 200 meters. I am using XCTU software. Is there any setting/configuration in ...
2
votes
1answer
79 views

Receiver understanding FSK bandwidth

I have a small doubt in a one way wireless communication. If I am using a receiver chip to demodulate an FSK signal. How does the receiver understands, which frequency to listen to? For example, I ...
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1answer
116 views

Noise level, SNR and BER relationship in BPSK modulation

I would like to know what is the relationship between SNR, noise level and BER in BPSK modulation scheme? Can you please tell me the formula?
0
votes
1answer
42 views

What is link Utilization factor?

I am trying to learn link utilization factor in data communication but can't find the actual definition of it.Can anyone give me an accurate definition of link utilization factor with the formula??
0
votes
1answer
50 views

Background functionality of a mobile phone

I'm asking this question out of curiosity. In general, we have around 6 to 7 radios in a smartphone. the modulation schemes, estimation procedures, synchronization methods are different for each ...
0
votes
0answers
50 views

AND gate mysteriously and ludicrously slow

I've made a 3 input AND gate from 4 NANDs in order to daisy-chain 3 motor drivers jrk 21v3 and get the current value out of them. The problem is, the command is sent OK, the driver responds OK with ...
1
vote
1answer
94 views

When is impedance matching necessary? Isn't it much less efficient on all other aspects?

I understand that discontinuities of the physical properties of conductors create reflections much like dioptres reflect a bit of light, but : in which cases does impedance matching become ...
1
vote
1answer
21 views

Cell Voltage Relaying in a Battery Management System

Question: If I have 48 lithium cells connected in series as a pack, how would I best go about physically implementing a system to measure, isolate, and relay cell voltages to a centrally managed ...
1
vote
3answers
57 views

Physical significance of group delay

What is the physical significance of the group delay of a system/filter?. Why is the slope of the phase response critical in a communication system.
0
votes
0answers
27 views

What sampling rates will give uncorrelated samples of x(t).considering the mean of the Random Variable 'x' to be zero?

What sampling rates will give uncorrelated samples of x(t) ? Considering the mean of the Random Variable 'x' to be zero. My Thinking: Since the mean of the random variable 'x'is zero,then it will ...
0
votes
1answer
64 views

Data transmission in ocean

What is the greatest depth where we can communicate with the submarine over the sonar system in ocean? Also, how can we calculate how much data can be transmitted using this method?
2
votes
1answer
60 views

when to use auto correlation and when to use fourier transform

In communication, if we don't know any prior information about the signal, we perform an auto correlation say Rx(T) and take the Fourier transform of Rx(T) to analyze the power spectrum. Supposing ...
0
votes
0answers
73 views

Microwave communication systems / data transfer rate vs data transfer speed

I'm researching about microwave communication systems, and I have to distinguish the difference between data transfer rate vs data transfer speed. I comment it will be something like you have a ...
2
votes
2answers
111 views

Very long transmission-line design tips

I'm designing a very long transmission line between a master node a some slaves far away connected by a bus where only 3 wires are used: - A DC power supply (24vdc) - B Digital comm - C Ground As ...