Inside Wireless: QAM modulation (Quadrature Amplitude Modulation)

[@Rfelements]

What is the limit of QAM modulation depth at the frequency band you use? 1024 QAM, 4096 QAM?

[@zazkegirotron]

For anyone that is not very familiar with the topic, 'I' stands for (In-phase) and 'Q' stands for (Quadrature = + 90degrees = 360/4) in the constellation diagrams (which map amplitude and phase into polar coordinates). This video is awesome and quick for someone that is at least a little bit familiar with the topic.

[@Rfelements]

Thanks for sharing!

[@ira9186]

This is explained better in this video than several professors have explained to me.

[@kasiviswanathan9505]

awesome explanation .. this channel should be trending in youtube ..

[@miketoreno4969]

Yeah right.

[@risingedgemusic]

Really Good Explanation and Great Production as Well ! Thumbs up!

[@Rfelements]

Thanks a lot!

[@emilianotca]

Awesome explanation: simple and direct, but also very complete.

[@Rfelements]

Thank you, glad you liked it!

[@JeremyCook]

Nicely explained... Seems the rabbit hole never ends!

[@Rfelements]

indeed, it goes deeper all the time :)

[@shameelashaik6423]

Super explanation in just 3 minutes. I can understand more and more.

[@Dan1loBC]

Simple, straight to the point and illustrative. Awesome!

[@Rfelements]

Glad it's useful!

[@kabandajamir9844]

The world's best teacher thanks sir

[@georgepalafox5967]

The modulator produces the symbols. Bits are fed into the modulator and the output are the symbols.

[@DavidBedia-zw6su]

Nice video! Well explained. Straight to the point.

[@leanvo3880]

very clear and intuitive explanation

[@Rfelements]

Glad you liked it

[@aldoruiz9165]

Ahora todo me queda claro, gracias por subir esta información

[@Rfelements]

Muy bueno!

[@sohanjoshi-co]

great production!

[@Heioshi]

This would have saved me a tonne of hours back in school

[@Rfelements]

Thank you :)

[@QuantumBraced]

Sorry if it's a dumb question, but if it uses amplitude and phase modulation, then why is only amplitude modulation in the name?

[@Rfelements]

The phase part of the name is hidden in the 'quadrature' ;)

[@QuantumBraced]

@@Rfelements Ah I see. But I thought quadrature was referring to the fact that there are 2 carrier waves offset by 90 degrees. They both get amplitude and phase modulated if I'm not mistaken.

[@Rfelements]

@@QuantumBraced Yes, they do, and the different phase shifts are between the bits the I and Q branches, but don't think about it too much. If everything should have been literal in this world, it'd be a boring place to live in don't you think? :)

[@markm1514]

I wish someone would have explained this to me this simply and clearly two years ago

[@tounsi7orr14]

The best explanation!

[@dvrblacktech]

Do we even have Differential QAM, i.e change in phase only if the transmission from 0 to 1 occurs? in DPSK, we don't need a coherent detector. Similarly in QAM too is it possible to have D-QAM?

[@Rfelements]

You can find bunch of papers which discuss DQAM, such as these: ieeexplore.ieee.org/iel5/5492959/5493597/05493801.pdf dl.acm.org/doi/10.1007/s11277-013-1085-0 link.springer.com/article/10.1007/s11277-013-1085-0

[@dvrblacktech]

@@Rfelements thank you sir..

[@tariqqazzaz8101]

thank you so much man, so helpful.

[@Rfelements]

Glad it helped!

[@حميدرمضان-ح2د]

what is the difference between the 128QAM and 64QAM with 28Mhz channel spacing , and is the modulation affecting the Transceivers price ? please your explanation highly appreciated

[@Rfelements]

higher data throughput speeds and higher SNR requirement. Yes, generally the faster the data rate is, the pricier the device.

[@aminurrahmanashik2786]

Amazing explanation. Thanks a lot.

[@oneinabillion654]

Hi, symbols are sent in Sinc pulses. And each pulse represents a symbol. How do we modulate the sinc pulses using QAM?

[@hscsciencestudy6177]

Which animator or software have you used to make this video ?

[@Rfelements]

Adobe suite

[@aarockiyaraj7230]

Thankyou so much for your efforts..

[@Veritasygm94]

Sir, QAM modulator transmitter capable of transmitting PAM signals ?

[@Rfelements]

QAM modulator only does QAM modulation in general.

[@jemelsantiago]

very good explanation.

[@renvill]

Why are they not called 2QAM and 4QAM and instead termed as BPSK and QPSK?

[@Rfelements]

you can call it that, but historically BPSK was developed first so that name stuck, including QPSK..

[@supadupahilton6848]

Presumably?? MCS stands for Modulation Coding Scheme??

[@yasirali3474]

Hello, I am follwing your channel. Can you please make a video on QAM demodulation? I will be waiting for you video on this topic.

[@Rfelements]

Its already in the channel for two years - kzbin.info/www/bejne/f5O4l5-Xmq-Wi5o - Cheers!

[@theoryandapplication7197]

thank you very much

[@perlazj9099]

Gracias por los subtítulos en español💜

[@Rfelements]

de nada

[@abhishankarbm]

U are the best

[@amafa1377]

JUST PERFECT

[@ManuelPinner]

The Differents between QAM Modulation and DBT-S Modulation,

[@Rfelements]

Hello. Are you referring to DVB-S?

[@ManuelPinner]

@@Rfelements Yes,

[@vspatmx7458]

Pls comment on ac 5 vs ax 6

[@Rfelements]

what exactly do you mean? Beyond the specs of these standards, is there any question you have?

[@vspatmx7458]

@@Rfelements I am interested in knowing About the difference in spks and difference in real life performance Between wifi 5 ac and WiFi 6 ax

[@Rfelements]

@@vspatmx7458 the real life performance is a big question mark so far, since the ax radios for WISP networks are just hitting the market..

[@miketoreno4969]

Thank you.

[@vinayak186f3]

Exam in 3 hours 🙂 , Thank you

[@Rfelements]

:D you're welcome, hope it's an A!

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Jos buttler started teaching 😂😂

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great!!

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Bad ass!

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ECE 485, UofA.

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Quadrature amplitude modulation modulation

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The explanation was too fast at times

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[@akmalkamalju6287]

Too fast

[@Rfelements]

Inside Wireless videos are meant to be fast - short snippets of knowledge to give people an overview and idea how things work.. but maybe in the future we will do longer ones. Maybe check our Webinar playlist for longer, more detailed explanations.

[@smartway6992]

Students love fast and direct information 🙂 because they have to consume lots of data at one's (that data that they are learning first time)

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[@theoryandapplication7197]

thank you very much