Questions tagged [communication]

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

Filter by
Sorted by
Tagged with
0
votes
1answer
53 views

How can I increase the range of a transmitter?

I am trying to increase the range of simple FM transmitter. Can I increase the range without changing the voltage of the transmitted signal? If this right what are some other ways?
0
votes
0answers
19 views

Probability and Stochastic Processes for Engineers Helstrom Solution Manual [closed]

Does anyone know if there was ever a solution manual published for Probability and Stochastic Processes for Engineers by Carl W. Helstrom ISBN 0-02-353560-1. thanks
0
votes
0answers
26 views

FUSB302 - Two devices, transmission between them

I have controller device with a FUSB302 Programmable USB Type-C Controller with PD for power detection for charge battery. I want to make a subdevice to emulate my own hardware. I know that FUSB302 ...
-1
votes
0answers
24 views

What's the difference between Ku band Satcom vs UHF Satcom bands?

Assuming that they are both used by the military. What are the basic difference of purposes?
0
votes
2answers
71 views

Is interleaving used in MIMO?

Correct me if I'm wrong, this is my understanding of MIMO: Is this how MIMO is able to increase data rate?
0
votes
1answer
77 views

How does MIMO increase data rate?

I understand how using multiple antennas helps improve reliability as it combats multipath propagation through redundancy. But how does using multiple antennas increase data rate?
-1
votes
2answers
80 views

AM Demodulation MC1496

I am trying to analyze the demodulator product detector circuit. This is done by the IC called MC1496, I find its datasheet, this circuit is in page 10 and the link is : https://www.onsemi.com/pub/...
1
vote
1answer
67 views

Colpitts Oscillator - Supply/Output Voltage

I try to simulate Colpitts oscillator but i got stacked about one thing. When I simulate this circuit, the output Vpp is 24 V in other words, it oscillates between 0 V and 24 V. The question is, we ...
0
votes
1answer
18 views

What is the difference between circuit switching vs virtual circuit switching data communication?

The circuit switching method of data transmission which was used traditionally is way too similar to the virtual circuit switching (packet switching) communication technique. What is the difference ...
1
vote
0answers
46 views

MSP430 UART Reading

I'm trying to transmit and receive data between Arduino Uno and CC430. There is no problem with sending data from CC430 to Arduino Uno. I can receive the data on Arduino side. Also I can transmit the ...
0
votes
6answers
113 views

Why are transmitting antennas generally larger than receiving antennas?

The reasons I can think of are transmitting antenna has to be more directive also larger length will imply larger power and thus will help compensating for losses. But on contrary if receiving antenna ...
0
votes
0answers
23 views

Push to talk (PTT) to Bluetooth intercom system

I want to build a push to talk button or a workaround for similar implementation to an existing Bluetooth intercom system. It is a Bluetooth headset from Schuberth (SC1M) at one end and a Pelstor ...
0
votes
1answer
53 views

How can I let 2 devices take turns accessing a SIM card?

I need to store data in a sim card using one device, then another device needs to access that data. They do not ever need to use it at the same time. A question was asked about this a few years ago ...
0
votes
0answers
16 views

Why use both packet detection and symbol time estimation in the receiver of WLAN(WIFI) in 802.11

n IEEE 802.11 Wlan, at the receiver side, we first use packets detection algorithm to detect the start of the packets, and then uses fine symbol timing estimation algorithm to find the start of the ...
0
votes
1answer
24 views

Data rates for each user in ADSL with discrete multitone technique

I read about MODEM technology from Forouzan's 'Data Communications and Networking'. Under ADSL technology it was said- The modulation technique that has become standard for ADSL is called the discrete ...
0
votes
1answer
55 views

CRC calculation

I have been attempting to understand the CRC calculation. I have found online CRC calulator and I have done an experiment. I have tried to calculate with this calculator the CRC16-CCITT (in the ...
0
votes
1answer
43 views

Using Bluetooth to rapidly connect and send data?

I have an idea for a distributed communication platform that I want to build. For my project, I would have many phones, and I would like to send ~20kb of data between each phone at a minimum range of ...
1
vote
1answer
67 views

How to configure the I2C of the MSP430

I have an MSP430FR6989 development board (MSP-EXP430FR6989). I would like to program it to communicate with a MAX30102 Pulse Oximeter and Heart Rate IC, the interface is done through I2C protocol. I ...
0
votes
1answer
45 views

What is the best way to get a receiver in sync with clock? Manchester encoding

This is my first post here, first off let me know how I go. I am going to be taking on a new project soon, to design a protocol for communication between two microcontrollers (I understand there is ...
2
votes
1answer
69 views

CAN-BUS line goes bus off state at high temperature(70C°)

I have a CAN-BUS line communicating at 50kb/s speed. There are only 2 products communicating with each other on the CAN-BUS line. One of these products has the STM32L496RGT MCU (the clock speed of the ...
1
vote
0answers
65 views

SIM7600SA 4g module to ESP32

I am in a middle of getting the required components for my project. I will be using ESP32 microcontroller and SIM7600SA module for 4g/lte.. Since, I am a beginner in this field, can someone suggest if ...
5
votes
7answers
262 views

Frame grounding, data & power - EMI

I'm looking into building some large robotics with (ofcourse) a frame, (shielded) data/communication cables - EtherCAT, and power lines. Now different 'experts', websites and people say all different ...
1
vote
1answer
64 views

Using RS485 over CAT5e Foiled Twisted Pair (FTP)

I'm planning a system that has two sub systems that need to communicate with the PLC via RS485. The baud rates are 9600 and 19200 bps. The cables are static (i.e. not moving) and placed inside of a ...
1
vote
1answer
59 views

RS485 communication issue

I have used PIC18F45k40 device for RS485 communication. I have 2 ckts one is isolated and another non isolated RS485 design. I have schematic & placement for reference. I have connected multiple ...
1
vote
1answer
36 views

RS485 Communication- board Hangs

I am using isolated RS485 for communication. MCU & RS485 IC communication is through UART. IC supports 500kbps datarate Configuration a) Baud rate- 460800 b) Every 0.1s I am sending 288bits data ...
0
votes
0answers
22 views

W5500 network configuration issues

I have used W5500 hardware for my gateway device. It has been implemented in 80-100 locations. But in 4-5 locations I'm getting an unusual issue related to the network connection. The ethernet mode is ...
6
votes
9answers
2k views

Why doesn't wireless transmission and reception require a common reference voltage

so I have been struggling with this for a while now. I have tried to search for the answer but haven't succeeded yet. Here is how it goes: If we take USART as an example for wired communication ...
0
votes
0answers
50 views

UDS vs XCP (Diagnostic)

When performing a calibration or a diagnosis acquisition from an ECU using a CAN-bus is there a protocol preferred? I've come across UDS and XCP but I can't quite get why one might be preferred over ...
0
votes
2answers
38 views

What is the highest possible optical output power of an SLED?

I am inquiring about this because I'm looking for a suitably high-power, large bandwidth light source for a fibre optic communication system I am designing. The distance the data will be required to ...
0
votes
3answers
84 views

RS-485: what happens when bus contention occurs

I'm refering to an half-duplex RS485 application which consists of a master and multiple slaves like in the circuit below (I'm using an ST3485). simulate this circuit – Schematic created using ...
1
vote
1answer
119 views

Is Lora maximum transmission 1 km in real?

I'm new to wireless communication and Lora. I'm using Lora Ra-02 and Arduino UNO and small 800 Mhz antenna. I'm using Arduino website library. How can I increase that range? What do I need to do to ...
1
vote
1answer
43 views

i2C connection setup

Following the diagram below, is it wrong to use the MCU 5V to supplying both SDA and SCL lines? I applied this into my circuit and my device are not communicating when connected to this circuit.
0
votes
2answers
47 views

Why is there a low pass filter in a DSBSC demodulator?

In analog communication, DSBSC (double side band suppressed carrier) is way of modulating signal. In this the carrier is simply multiplied with the message signal. At the demodulator, the carrier is ...
3
votes
2answers
63 views

How to ensure all nodes on CAN bus have received the message

I know that that the ACK bit will be driven by the receiver of the CAN message. I'm wondering what would the situation be if you have multiple nodes listening to the same message. How would you ...
0
votes
1answer
42 views

Blocking test for receivers

In a receiver blocking test, I always see the description that "the test is peformed at a signal level 3dB above the required sensitivity". So what is meant by testing the receiver at "...
0
votes
0answers
49 views

What technology should I use for tracking small boats venturing upto 50km in the sea?

2017 south India was struck by a cyclone Okhi which took many small fishermen's life. I'm an electrical engineering student and want to do a project regarding tracking these boats and implement an ...
0
votes
0answers
35 views

Calculate bandwidth of wide-band FM from spectrum graph

I want to calculate the bandwidth of my signal output from the graph it results from application of the FFT. I can apply the Carlson formula knowing that I have all the parameters :$$B = 2(\beta +1 ...
0
votes
2answers
91 views

Why do simple optical fibers usually support only half-duplex communication?

I'm a newbie to the subject, so a thorough answer would be very helpful. I was curious as to why simple (single) optical fibers usually don't allow full-duplex communication. To my understanding, all ...
3
votes
2answers
190 views

Does the bandwidth of an NBFM modulation change depending with the modulation index?

Hello electrical community ! I'm learning about FM Modulation ,especially with narrow Band FM.And I was wondering if the index of modulation BETA affect the bandwidth of the modulated signal. In fact ...
1
vote
0answers
43 views

Leaky Bucket Example

I have an image below of a leaky bucket image that I am trying to understand for my telecommunications class, and I was hoping for some guidance/verification if my train of thought is on the right ...
1
vote
0answers
30 views

How can one compare resonant and non resonant antenna based on parameters like Directivity, Radiation resistance, Cross polarisation, Efficiency?

Basically I want to make a choice between two antennas when ample space is given objectively based on parameters 1.Directivity 2.Radiation Resistance 3.Cross Polarization ratio 4.Loss resistance I'll ...
2
votes
1answer
411 views

What is difference between resonant and non resonant antennas?

I don't know if it's right place to ask it, but I searched google and books the answer I get seems to be like resonant antenna have small bandwidth and have standing wave instead non resonant antennas ...
0
votes
0answers
40 views

Find the 4 pins for i2c on printer consumables' chip - konica minolta

I just saw this video https://www.youtube.com/watch?v=Wwd5UCi9Huw about forcing an OEM (= original) printer consumable chip to reset its lifespan counter. However the chip on that vid has 4 ...
0
votes
0answers
39 views

Is there any applications for short data transmission?

In some applications like IoT, the transmitter turns off for power saving when the transmission is not needed. I'm not sure but I heard that: when the transmitter is on, the data length - in time - ...
2
votes
1answer
70 views

Address-free communications between microcontrollers in any topology

Suppose I have 9 microcontrollers each on their own PCB, connected in a square grid. Is there a way I can get a single node to communicate to all the other nodes, be able to address them individually, ...
3
votes
1answer
82 views

What is the difference between capacity and throughput in context of wireless/cellular communication?

From what I understand: Throughput tells you how much data was actually transferred from a source at any given time Bandwidth tells you how much data could theoretically be transferred from a source ...
0
votes
0answers
27 views

Serial Communication Arduino to NodeMcu

I'm looking to take inputs via keyboard by Arduino mega through USB cable (Serial monitor Inputs), and send them to nodemcu through serial communication (TX - RX ) so I can send it to a server (from ...
1
vote
2answers
62 views

Are “switching circuit” and “circuit switching” related?

"Switching circuit" is a concept opposed to logic circuits. Both are used for implementing digital circuits. The first link says From 1934 to 1936, NEC engineer Akira Nakashima published a ...
1
vote
0answers
47 views

MDB Protocol - Communication between a PC and a payment terminal

I'm working on a project where I need to create a communication channel between a standard PC (running Windows) and a payment terminal (a NFC credit card reader, an Ingenico iUC 180B). I'm a junior ...
1
vote
1answer
65 views

How to communicate over long distances (60 m) using serial communication from multiple serial devices connected to my PC

Previous post As per my previous post which involved determining which type of serial connection is appropriate i.e. RS232, or USB. This was clearly RS232. As a follow on post to that question. I have ...

1
2 3 4 5
23