Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [bit-rate]

Questions relating to the rate at which bits are transmitted over a channel (wired or wireless). Usually specified in bits/s or a multiple of that unit. Related but not the same as baud rate or symbol rate.

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Why is the bitrate of infrared smaller than the bitrate of WiFi?

Infrared has a frequency of 300 GHz – 430 THz, while WiFi has a frequency of 2.4 GHz or 5 GHz. As the frequency of infrared is greater than the frequency of WiFi, the transfer rate (bitrate) of IR should be greater than WiFi. In reality, IR…
Muhammad Ikhwan Perwira
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SPI: effective payload throughput per clock tick?

Let's say I'm clocking a SPI bus at 30 MHz. What payload throughput can I actually expect? 30 Mbps, or less? (E.g. are high overheads imposed by pauses, control packets, packet headers, packet checksums, etc? SPI noob here.)
AlcubierreDrive
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How to calculate the data rate of LoRa?

Picture below is from this web, how to calculate the data rate ? For example, how much kbps is Bw125Cr48Sf4096 ?
Enhao Lan
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Wireless Audio Transmitter

I am working on a project that will digitize an audio signal from a standard RCA jack and transmit that signal using Bluetooth to a receiver and then convert it back to an analog signal which I will output to a speaker. I know that I will need 2…
EEstudent
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What is the meaning of "longer electrical length = more wavelengths"?

Reading a Keysight-note, not sure what is the following selected line means? I read and understood the meaning of electrical length, how it is related to bit in flight and wavelength is not clear.
student7
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Does the fundamental frequency affect the bit rate on a wire?

This is from the book Computer Networks by Tennenbaum: The bandwidth is still the width of the band of frequencies that are passed, and the information that can be carried depends only on this width and not on the starting and ending…
Koray Tugay
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Why is the frequency response of an LED important?

I'm working on visible light communication where I fabricate my own organic LEDs. One of the ways to characterize them is "small signal analysis." I understand we are applying this analysis to see the bandwidth of the OLED, but I do not understand…
LifeIsBeatiful
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Nyquist theorem, seems wrong to me

For Nyquist theorem, for channels without noise the bit rate is: \$N=2B\log_2(L)\$ N= bit rate, B= bandwidth, L= number of levels Intuitively I say that it should be: \$N=B\log_2(L)\$ Indeed if L=2, every signal carries a bit, so the bit rate is…
Ramy Al Zuhouri
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Why a high number of harmonics means a lower bitrate?

I am studying on a book (I'm still at basics) and I haven't understood why a signal with a lower number of harmonics implies a low bit rate. I have this figure: It clearly shows how a signal with a high number of harmonics means that the bits are…
Ramy Al Zuhouri
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Why is BER higher for binary modulation compared to quaternary?

I came across this image in my notes and I fail to understand why BER seems to decrease as the modulation order increases and I was hoping for an answer
dilinex
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ramp-up "guard" time (data receiver)

I have looked at multiple datasheets of multiple radio modules including one I'm using (HM-TRP) and none of them specify a ramp-up or a ramp-down time. According to research, this is known as the guard time. Through my own experimentation with data…
Mike -- No longer here
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8051 baud rate calculator using 16-bit timer for software UART timing

I'm making a project in which pulsed laser beam data is sensed through many optical sensors (one sensor per port pin), so essentially, I'm going to be making 4 UARTs to sense this. Currently I am using an AT89S52 microcontroller with a 22.1184Mhz…
Mike -- No longer here
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UART bit-rate vs frequency fundamentals

I am analysing some requirements regarding the sampling to be performed on a UART. There is information provided however I am slightly confused by it and would like some clarification: "The UART Receiver will sample at least 16 times faster than the…
user7427901
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Is there a fieldbus with more than 250 nodes per segment?

We plan to realize a sensor cable several 1000m long which has ideally every 1-2m a magnetic field sensor on a small 10x30mm platine with microprocessor/FPGA for DSP and I2C on chip communication. Later this will be integrated into an ASIC. The…
user48953094
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How can I be sure that a multi-bit-per-symbol encoding schema exists?

(I came up with this question when I try to understand bit rate and baud rate.) Suppose I have some data to transfer. And the data is binary encoded as a data amount of N bits. If I use 2 symbols to represent the binary data, which means one symbol…
smwikipedia
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