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

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0
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3answers
69 views

Electromagnetic Radiation and Communication! [on hold]

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 ...
0
votes
0answers
16 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
0answers
21 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. ...
-5
votes
0answers
34 views

Radio Tuning and Filters [closed]

Whats meant by tuning a radio ? Does it mean that when we move a tuner it selects one radio channel from many radio channels? Does it mean that channels are different because they have different ...
1
vote
0answers
43 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 ...
0
votes
0answers
29 views

Communication between IC and microcontroller (Teensy 3.2) [migrated]

I am trying to use a rotary encoder with an integrated circuit to measure the position of a rotating shaft. I am then taking this data and writing to an SD card. The IC seems to be working correctly ...
-1
votes
1answer
32 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
83 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
52 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
48 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 ...
0
votes
0answers
9 views

master slave control of 2wd robots using xbee [migrated]

Hi there I just need to ask you how I can send command from master robot to slave to follow using Xbee. I have configured both the xbee in AT mode, but I totally dont have the clue how the program. I ...
2
votes
0answers
46 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 ...
0
votes
0answers
27 views

the needs of CRC on communication using 3DRadio

I've been designing a system to communicate between an UAV to GCS by using 3DRadio module, and on its page it seems that it already features CRC The ECC parameter makes a big difference to the ...
-4
votes
1answer
109 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
0answers
82 views

ESP8266 sends garbage data always on reset

I am assigned to do a project on IOT using the ESP8266 wi-fi module. For refashing the firmware I also bought a USB-TTL converter and installed the necessary drivers on my PC I connected the RX and ...
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
328 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
58 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
27 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
33 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
541 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
131 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 ...
0
votes
1answer
50 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
59 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
45 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
28 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
92 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
82 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
25 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
71 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
70 views

STM8S I2C Master Missing ACK

I use I2C communication with two stm8s boards. My master code: ...
2
votes
1answer
52 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
77 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
51 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. ...
-1
votes
1answer
40 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 ...
0
votes
3answers
86 views

Is it possible to directly interface a MEMS ADMP541 microphone over I2S with any Microcontroller?

I have bought a MEMS ADMP541 Evalution kit to record voice samples with arduino controller MEMS microphone will produce digital o/p , I2S communication protocal My question is should I directly ...
2
votes
1answer
394 views

RX/TX LED for MAX232

I want to use two LEDs to show send and receive on my max232 RS232 to TTL (5v) converter. I have seen this method as the most conventional way to power an LED for max232: I tested it and the LED ...
-3
votes
1answer
66 views

Convert USB3 to WIFI [closed]

What methods could be used to convert USB3 communication to WiFi, when there is no access to the device's OS?
0
votes
1answer
116 views

Generating Sync Signals [closed]

Normally any sort of video signal received by means of RF,contains a Hsync and Vsync component for instructing the electron beam.My question is ,how does the television do this using external sync ...
-1
votes
1answer
92 views

Clock and data vs rx and tx communication

I'm working on a project in which I have to make two pic10f200 microcontrollers communicate via serial communication lines. I know that with Arduino you interconnect the two board's rx and tx lines, ...
0
votes
5answers
105 views

Will the data throughput decrease if the transmitter and receiver are in motion?

What I'm thinking of is a 2 way communication (voice communication) between two systems which are in motion. (like 100 km/h difference) Will the data transmission and reception be disturbed, by how ...
1
vote
0answers
28 views

Compressed single-sideband modulation?

I've had an idea for a new form of SSB modulation, using half-angle formulas as a basis for compressing the sideband of a SSB voice transmission. However, this idea seems so simple that I feel it must ...
1
vote
1answer
49 views

Bessel Differential Equation and Angle Modulation

I'm trying to undestand the role of the Bessel differential equation in calculating the side bands of a phase modulated signal. I started out with the textbook example $$u_{PM} = cos(w_C \cdot t + ...
-1
votes
1answer
51 views

Why TMSI is required when we have IMSI?

In several 3gpp documentation pages, it is mentioned that we use TMSI in every sim cards to identify the user in a local network. But my questions is that if we have IMSI, then why they need TMSI for ...
1
vote
3answers
74 views

Lightweight point to point communication protocols

I'm working on designing a point to point communications link for a cubesat. I just want to confirm some of my understanding. In my opinion it is only necessary to have physical layer and data link ...
0
votes
2answers
71 views

Convert TTL levels to RS232 of FTDI USB<->Serial

Have this small interface FTDI FT232RL to connect a Serial device to the computer via USB. It has been working well for most of my Serial applications, except today when I tried to use it for a ...
1
vote
0answers
56 views

Computing the received signal

My question may seem a little bit easy but I'm new to these concepts and was hoping if you could help me clarify them by answering my questions. The received signal at the detector writes: $$ y = h x ...
0
votes
3answers
135 views

Wireless Communication between microcontroller and PC

I have a FRDM K64f board that is using the nRF24L01+ as it's wireless transceiver. I want to communicate between the K64f board and my PC locally. I am struggling to find the hardware needed on my ...