Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [data-rate]

26 questions
40
votes
9 answers

Why is wired Ethernet losing its speed advantage over wireless?

This has been bugging me for a while now. I did a couple wireless transmission courses back in my university days and it's a known fact that wireless transmission is hard. Partly because it's a shared channel, physical objects can be in the way, air…
Francois
  • 567
  • 1
  • 4
  • 6
15
votes
9 answers

Why doesn't higher frequency mean higher data rate?

My question is very primitive :) I've read multiple articles today and answers here, on Stack Exchange, but still don't understand one thing. Why doesn't frequency itself affect data rate in mobile networks? 3G/4G networks use QAM modulation, that…
Raiker
  • 167
  • 1
  • 4
5
votes
2 answers

Does Nyquist rate depend on the sampling rate?

The book Computer Networks by Andrew S Tanenbaum mentions the following (paraphrased): For a noiseless channel, Nyquist theorem states: Maximum data rate = \$2H \space log_{2} V \$ bits/sec \$H\$ : channel bandwidth, \$V\$: no. of…
Masked Man
  • 1
  • 1
  • 6
4
votes
1 answer

Observing ethernet auto-negotiation packets using oscilloscope

In an answer to one of my previous posts seen here: Verifying 802.3 auto negotiation, @Zac67 mentions that by using an oscilloscope I could observe normal and fast link pulses that are sent in order to determine ethernet data rates of newly…
Niko_Jako
  • 67
  • 8
3
votes
1 answer

ADXL345 Accelerometer data rate vs bandwidth

I recently started working with the ADXL345 Accelerometer and got a bit confused on what's the difference between the data rate and bandwidth. From the ADXL345 datasheet p14, we can see the different available data rates and bandwidth : What…
B.Adlane
  • 45
  • 3
3
votes
1 answer

TX Antenna dBi relevant for transmit and receive rate?

If for example I have a USB WiFi adapter with -70dBm sensitivity and 20dBm tx output power and a 5 dBi omnidirectional antenna. If I change the antenna to 9 dBi, in the coverage zone with same range, I know I can reach higher transmit rate. But how…
biyduher
  • 31
  • 2
2
votes
0 answers

AD9361: how to compute datarate and configure filters

I will use AD9361 as a transmitter of a modulated baseband signal. The modulated baseband signal is implemented in FPGA/SDK. AD9361 has real-time bandwidth of 56MHz but we have maximum 61.44 MSPS data rate even if 1RX1TX is used. This is obviously…
AD23
  • 31
  • 3
2
votes
2 answers

Maximum Ethernet bandwidth through a slip ring

I'm trying to understand what would prevent a 1 GbE non-optical slip-ring from transmitting 10GbE, 40GbE or even 100/200/400GbE. They all have 'metallic'/copper variants (backplane or short cable) and I can only find up to 1GbE industrial slip-rings…
Touisteur EmporteUneVache
  • 23
  • 3
2
votes
2 answers

Maximum rate between ADC-FPGA link for Igloo 2 vs Max 10

An ADC has a source synchronous output interface and is to be interfaced with an FPGA. The ADC can communicate using single ended CMOS, DDR CMOS and DDR LVDS. How do I know what is the fastest rate that I can run this at with the FPGA I have,…
gyuunyuu
  • 1,933
  • 7
  • 31
2
votes
2 answers

sampling rate, data rate and bandwidth

I'm new to digital communication. How are the terms data rate and sampling rate related to the term "bandwidth" . Am I missing something here?.Can someone explain me in detail? thanks in advance, phani tej
phanitej
  • 205
  • 1
  • 2
  • 8
1
vote
1 answer

How to compute data rate I can reach with my design?

I implemented a modulator for a transmitter, which sends baseband modulated signal. The transmitter has the following parameters: datarate : 520 Ksps (min), 64,44 Msps (max) Bandwidth: BW = 56 MHz (max) 47 MHz to 6 GHz Of course, with my design…
AD23
  • 31
  • 3
1
vote
1 answer

what is the meaning of BLE data rate 1Mbps?

I am using BLE HM10 module which is BLE 4.0 1Mbps assume I have 1000000 data bits to send within a second, so I need 1Mbps bandwidth, Is 1Mbps only for Data bits? or 1Mbps means complete Bluetooth packet bits + data bits?
oppo
  • 537
  • 1
  • 7
  • 22
1
vote
2 answers

What is the meaning of Angular Velocity Vector 100Hz of BNO055?

I am using an Arduino Nano with BNO055 Adafruit library. The I2C speed is 400 kHz. The Adafruit BNO055 Absolute Orientation Sensor mentions Angular Velocity Vector (100 Hz). What does this 100 Hz mean? Is it outputting angular velocity 16bit…
vassidefuk
  • 89
  • 1
  • 8
1
vote
2 answers

How to calculate the maximum data rate or frequency of a bus driver

I'm searching a suitable bus driver for a project. I found the Nexperia 74VHC244D. On the website they say the maximum frequency is 60MHz (here). But how do I calculate the 60MHz? Because it's not mentioned in the datasheet. Is it just the inverse…
Momchilo
  • 194
  • 8
1
vote
2 answers

Bandwidth and Data Rate FSK Demodulations

I have a question about the data-rate limitations imposed from bandwidth for FSK signals. Suppose I transmit an FSK signal with frequencies as: $$f_1 = 2400 MHz,$$ and $$f_2 = 2401 MHz$$ that is detected by a receiver. Assuming that the DC output…
user367640
  • 159
  • 1
  • 9
1
2