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

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3
votes
2answers
103 views

A visible light communication question concerning a preamble sequence

I have a question about preamble and preamble breaker. I am implementing a simple visible light communication using arduino. I have used a Manchester encoding scheme. While I have understood that a ...
-1
votes
0answers
23 views

Arduino communication via 2.4GHz band [on hold]

I want to make my Arduino's communicate with my laptop,phone,and with each other.I want to use the 2.4GHz band because every device(PC,tablet,etc.)can connect to it,it's fast and it can travel a long ...
1
vote
0answers
81 views

How to network hundreds of sensors over a serial connection?

So I'm looking for a way to connect hundreds (300-400) sensors (like an accelerometer) together over a serial connection to a micro-controller. The sensors would transmit about 500kbps each. I've ...
1
vote
1answer
31 views

Channel-Loss and Channel-Insertion-Loss

Read many time about Channel-Loss and Channel-Insertion-Loss, but confused that, is that same thing or opposite? Which has +ve or -ve values in dB? In reference to equalization of USB3.1.
3
votes
2answers
191 views

Controller area network received message filtering mechanism

I am working on some CAN communication project which allows us to control some external device attached to one node from some other node. The CAN bus is a broadcast network and hence a message sent by ...
0
votes
0answers
10 views

Effect of bandwidth change on Figure-of-merit in DSB-SC

I want to ask about Figure-of-merit in DSB-SC. I know that Figure-of-merit on DSB-SC is SNR of input divided by SNR of output, which is for DSB-SC by default is 1. So, I got a problem from my class. ...
1
vote
2answers
43 views

Connection to ground for a Cat5e Shielded outdoor rated cable

My ISP installed the cable modem in my entertainment room. I am trying to have internet also in my STUDIO with an access point to broadcast a second WIFI from there to other parts of the house. (My ...
1
vote
2answers
107 views

LC circuit in radio receiver

Why is it required in radio receiver to tune the LC circuit to the the resonant frequency of the station in order to receive the station ? How this tuning filters the desired signal from the other ...
-3
votes
0answers
66 views

What type of laptop connector is this? [migrated]

Does anyone know what type of connector is this? This connector it`s on a old toshiba laptop, which have just HDD, DVD-ROM and 2 USB connectors.
0
votes
0answers
26 views

Sim900A Breakout board is not working

I'm using sim900A breakout board. It has UART interface with it.I'm trying to interface with PC. Module has 8 pins. Vcc,DTR,TX,RX,MIC+,MIC-,Speaker+,Speaker-,GND pins respectively. Here I have two ...
0
votes
1answer
49 views

Radio data transfer too slow [closed]

I need to send data from a camera recorder to a pc. The camera is about 1024/1000 pixels with 15 fps. Now the transmission distance should be at least 100 meters so I'm trying to use radio, but i ...
2
votes
3answers
89 views

How does the maximum transmission rate depend on the carrier frequency?

This question refers to the following excerpt from Computer Networks by Andrew Tanenbaum: The amount of information that an electromagnetic wave can carry is related to its bandwidth. With current ...
0
votes
1answer
26 views

Actual procedure used to establish a MW link budget in telecom?

If it possible can someone share with me the actual procedure used (Not the theoretical steps in book !) like in Huawei or others telecom vendor to establish a Microwave Link between to sites Like ...
-2
votes
3answers
85 views

What do I need to transfer data from device A to device B? [closed]

Disclaimer: I have no experience or knowledge at this topic. I ask this only from curiosity. I want to build two devices. Device A should send data to device B. Device B should display the received ...
0
votes
0answers
39 views

Interfacing a TM4C123 with a Basys3?

I'm trying to build a shell-based real-time OS on a TM4C123 LAUNCHPAD. I already have the kernel and file system done, and I was hoping to add interactivity to this implementation. I was hoping to ...
0
votes
1answer
48 views

XY graph modulating/demodulated signals in FM

I am using Labview to simulate a communication channel using FM modulation/demodulation (with MT Modulate FM VI and MT Demodulate FM VI to be more precise). I made a XY-plot (see below) showing the ...
0
votes
3answers
82 views

Electromagnetic Radiation and Communication! [closed]

I read that the accelerated charges create electromagnetic field/spectrum which consists of following different waves: gamma X-rays ultraviolet visible light infrared microwaves radio waves gamma,...
0
votes
1answer
55 views

On the Channel capacity

If we are told that the instantaneous SNR at a specific frequency \$f\$ is \$\gamma\$ (We do NOT assume that the channel is AWGN but we are only interested in the capacity in bit/s/Hz at this ...
0
votes
1answer
60 views

Connection between MDB Peripheral and Arduino

I'm working on making a custom vending machine controller using an Arduino as the master. The bill acceptor I'm using implements the MDB communication protocal, which is (I think) a variant of RS-485. ...
1
vote
0answers
76 views

Wired MBus Design - Circuit and Communication

Been working putting a wired Mbus circuit for a while now for both the master and the slave. For the slave, I am using the ON Semi NCN5150 Slave Chip and built the circuit just as the development ...
-1
votes
1answer
34 views

Converted from ms per int to Hertz [closed]

I am trying to convert from ms per int to Hertz. I have found that my system takes 0.2313ms to transfer one 32 bit interger. Based on this answer Difference between Hz and bps I have divided my ...
-3
votes
2answers
95 views

Is it possible to transmitting video signal on 433MHz? [closed]

A video of 2MP or lesser at a distance of 2-3Km. Is it possible to transmit it on 433MHz ISM band?
1
vote
1answer
61 views

Problems reading GPIO states set between STM32F Discovery and Nucleo64 boards

I am currently having an issue setting up a communication protocol between an STM32F discovery board (using the latest HAL drivers) and a Nucleo64 board (using the same drivers). Essentially each ...
1
vote
1answer
51 views

Large range input single level shifter

I have an application where I will be taking serial signals will need to level shift the signal to 3.3V. The input signal will be from 15 to 5V for a high input and I need them all shifted down to 3....
2
votes
0answers
52 views

Understanding Phone Service from Cable Companies [closed]

Since communication technology is considered part of EE, I thought I would pose this question here - hopefully it is on-topic. Cable companies like Comcast have been offering home phone service for ...
-4
votes
1answer
113 views

Cheap fiber communication [closed]

Is there a cheap fiber optic communication solution? I mean, whithbtarget price around $1 for one side. I don't care about bandwidth, just want it optical.
0
votes
1answer
17 views

Controlling initial phase of carrier during modulation?

During the process of modulation, any of the three parameters, viz \$\ A_c\$ , \$ω_c\$ and φ, of the carrier wave can be controlled by the message signal where φ is the initial phase. How is it ...
3
votes
1answer
337 views

RS-232 for approx 1600ft

I am using a cable of approx 1600ft to enable communication between two computers using RS-232(pins 2,3 and 5). On checking the transmitted signal on the oscilloscope, i get the output as below (hex ...
0
votes
1answer
68 views

10Mbs USB to serial communication

I want to transfer data from a full duplex serial device (TTL) to the PC. The data rate is 10Mbs , i am investigating potential solution. I can add a level converter like max232. I have 2 questions: ...
1
vote
2answers
29 views

Scheduling: Is is a Physical layer functionality or a Data(MAC) layer functionality or is it both?

Fellas, When we use the term SCHEDULING in wired/wireless communication, does it relate to a physical layer functionality or a Data (MAC) layer functionality or to both?
0
votes
0answers
45 views

RS232 Termination Resistor for MAX202IPW Application

Should I terminate the Rx and Tx lines for RS232 Transmiter MAX202IPW or there is already a built-in termination? What termination resistor should I pick, and how it should be connected. In the ...
4
votes
2answers
555 views

UART synchronization [duplicate]

I am trying to understand UART synchronization. In a UART, the default state is high, and it starts the reception process when it receives a start bit (high-to-low transition) In some scenarios any ...
0
votes
3answers
176 views

Operation of LC circuit in Frequency Modulation with simulation and linking it to the basic principle of frequency modulation [duplicate]

Can somebody help how message signal (words spoken near microphone) is modulated using LC circuit and how lc circuit oscillates at particular frequency by applying dc voltage. In the below circuit l1 ...
0
votes
1answer
51 views

Whats happenning with my logic levels?

I'm using a 3.3 MCU and a 5v logic RS-485 IC. I'm trying to send out some data to another controller. I don't have a logic level shifter as of now. So I decided to use resistor divider, to get it to a ...
-1
votes
1answer
62 views

Finding the repetition rate of output pulse [closed]

I have finals coming up next week and I failed to solve this following problem, any help will be appreciated. An automatic translator, with a capacity of \$10^3 \frac{bits}{sec}\$ converts ...
1
vote
2answers
51 views

I2C bus multiplexing issue

I am seeing an unexpected side effect, and could use some pointers. I am working on a project which uses five TCS34725 color sensors. These sensors are being interfaced via I2C on a TI F28069M DSP ...
1
vote
0answers
29 views

Sources of online broadband RF energy data stream?

I am interested in finding recordings of broadband FM radio emissions, ideally in the marine VHF frequencies (156.0 and 162.025), in order to understand carrier artifacts and distortions that could ...
0
votes
1answer
96 views

Communication over DC Bus at low data rate

I am looking for a solution to modulate a data signal into a DC powerline that has 12-60V. I found for example the DC-Bus solution from Yamar. But they are the only ones offering this and their chips ...
-2
votes
2answers
87 views

Since it is possible to get high quality streaming video via a regular TV antenna, why can't we also get broadband internet that way? [closed]

I just bought an over-the-air antenna for my TV, and I am getting very clear and high quality video for at least 20 channels. It occurred me that if the over-the-air communication mechanism is capable ...
1
vote
2answers
92 views

UART communication issue

I am trying to send something from an atmega to my pc. The setup is: Ubuntu 14.04, atmega644P-20PU, USBASP v2, TTL-to-USB pl2303 Firstly I tried to write the code in C and used this code and then ...
2
votes
1answer
65 views

Transmitting data in a house which strongly attenuates RF signals

Is there a way to transmit data throughout my house without RF? My application: I want to spread sensors and actuators in my home. Due to the nature of these things I do not need high data rates, a ...
1
vote
1answer
32 views

SNR definition in SIMO system

Consider a SIMO (1 transmitter - several receivers) system in which The receiver antennas are used to obtain space diversity and we have a multipath fading channel between transmitter and each ...
0
votes
1answer
72 views

fm data transmission

I need to send serial data ( approx. 60kbs continuous ) over a non contact interface (basically a rotating pulley). I can transmit power to the device with a coil rotating inside another coil (inside ...
1
vote
1answer
114 views

STM8S I2C Master Missing ACK

I use I2C communication with two stm8s boards. My master code: ...
2
votes
1answer
54 views

When to process beam forming algorithms?

I am building a system that uses beam forming to locate noises at different spots. All of the spots will be in front of the microphones (180 degree range of spots). My first question is if the beam ...
0
votes
1answer
83 views

What does “capacity achieving code” mean?

I am an electrical engineer passed several courses in information theory and coding theory, however as I think now, I see that I have not understand the basic ideas in these concepts till now. We ...
0
votes
3answers
59 views

How does async data transmission actually work?

I think I understand synchronised data transmission between A and B. They share a synchronised clock signal that indicates when the transmitter is sending a bit and the receiver should read the value. ...
-2
votes
1answer
45 views

How is data transmitted on different media? [closed]

Thinking about computers primarily, I'm trying to get my head around how data is transmitted along various transmission media. In particular, I'm getting confused between the use of electromagnetic ...