Can You Double the Data Rate by Doubling Transmit Power?

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Iain Explains Signals, Systems, and Digital Comms

4 ай бұрын

Explains that if you double the transmit power, and also double the number of bits sent per unit time, then the modulated transmit symbols will be more prone to errors from noise, since they are closer together in the constellation diagram.
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Пікірлер: 18

@lasertv3598 4 ай бұрын

Another great video. I get to learn and it keeps my knowledge from fading away.

@iain_explains 4 ай бұрын

Glad to hear it!

@Oshea321 25 күн бұрын

can you do a video on communication codes like turbo codes bcjr ldpc decoding visualized thanks

@egearslan8127 4 ай бұрын

Thanks for the video. I understood it for QAM. I wanted to ask why this also true for multi dimensional modulation schemes. Thanks in advance

@iain_explains 4 ай бұрын

I assume you mean orthogonal modulation schemes (eg. FSK)? In those cases, to increase the data rate you need to add new dimensions (eg. new frequencies). That means you're increasing the bandwidth. Increasing the power just reduces the BER. (Of course, there are things that can be done to adjust the end-to-end data rate using coding, but I'm trying to emphasise the physical layer here.)

@payman_azari 4 ай бұрын

Great explanation, I was new to the concept. Thanks, professor!

@iain_explains 4 ай бұрын

You are welcome!

@scienteer3562 4 ай бұрын

You can, so long as Data Rate

@ahmedbendary6917 3 ай бұрын

This is clear at low SNR where the log function is almost linear.

@shantharma5510 3 ай бұрын

Hi Professor , can you do a topic on Spectral Correction and FFT Limitations , which involves WINDOWING functions? would be much appreciated . Thank you ;}

@iain_explains 3 ай бұрын

Thanks for the topic suggestion. I've put it on my "to do" list.

@lucidasser7153 4 ай бұрын

Thanks, in the IQ plane, there is no real unit (U or E or H) - is that right?

@iain_explains 4 ай бұрын

What do you mean "real unit"? The axes are the signal voltage levels (scaled to a unit resistor - ie. Power=V^2/R where R=1ohm).

@lucidasser7153 4 ай бұрын

@@iain_explains yes this is the answer - it was not mentioned in the video...thanks