Quadrature Amplitude Modlation (QAM): Explained

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  • Опубліковано 24 гру 2024

КОМЕНТАРІ • 60

  • @WhyDoesMyCodeNotCompile
    @WhyDoesMyCodeNotCompile 9 місяців тому +7

    I feel like one comment isn't enough to express how great this video is. If i could frame this explantation and hang it in my room i would do so in a heartbeat

  • @leebyw7473
    @leebyw7473 10 днів тому +1

    I wish I could see more videos like this. Well structured lecture. Thank you for your time putting this together.

  • @marioalday5966
    @marioalday5966 Рік тому +32

    David, this is the greatest explanation on the topic i have found in years (I am 60). BTW your graphics are amazing too.

  • @behnamheimer
    @behnamheimer 2 місяці тому +3

    This is one of the most informative and useful channels, immediate follow!

  • @vladimirilberg2545
    @vladimirilberg2545 7 днів тому

    What a great video. Super well explained. Many thanks for that!!!

  • @WhyDoesMyCodeNotCompile
    @WhyDoesMyCodeNotCompile 9 місяців тому +3

    I am immensely greatful for this amazing explanation and visualisation of QAM. I have been wrecking my brain for days to understand this topic, but only now i feel like i can finally grasp it

    • @shanks6208
      @shanks6208 9 місяців тому +1

      Hahh,Congratulations!

  • @dmitrytitarenko8281
    @dmitrytitarenko8281 Рік тому +2

    Thank you for presenting it in a such straight-forward manner

  • @karankishore7983
    @karankishore7983 2 місяці тому

    Man , this has to be the best explanation out there . thankyou

  • @lucinaldosantos
    @lucinaldosantos Місяць тому

    Amazing and clear explanation! Apreciate you for putting your effort on it, congrats!!

  • @justingilmore1225
    @justingilmore1225 Рік тому

    Fantastic! This makes QAM SOOO much easier to understand. Thank you!

  • @sebwk01
    @sebwk01 6 днів тому

    Splendid video, thank you so much ❤
    I would only suggest not showing all plots from the start, but rather fading them in as you talk about them, or alternatively highlighting them in some way. That way it is easier to follow what part of the image you are talking about.

  • @TheDjinh
    @TheDjinh 6 місяців тому

    Best. Explanation. Ever.
    You must have put so much time into this video. Thank you for that!

  • @3ndr3wmusic56
    @3ndr3wmusic56 Рік тому

    I really need to see things visually to understand. This video helped me a lot, thank you very much!

  • @dragonfire23141
    @dragonfire23141 Рік тому

    Thanks for the incredible video, it finally made QAM click for me.

  • @tomwest9605
    @tomwest9605 2 місяці тому

    Great and helpful visualization and explanation, keep up the good work!

  • @remybouche7483
    @remybouche7483 2 роки тому +1

    As always, a very instructive video with nice animations. Thank you for your work !

  • @geofish101
    @geofish101 Рік тому

    Incredible video, fantastic graphics!

  • @asimmohammed6978
    @asimmohammed6978 Рік тому

    You are Super genius! Best video ever. Thank you! 🙏🙏🙏

  • @dominiquelarchey-wendling5829
    @dominiquelarchey-wendling5829 7 місяців тому

    Very good explanations of QAM !!

  • @pieterboning
    @pieterboning Рік тому

    VERY good explanation!

  • @jaiisrani2550
    @jaiisrani2550 8 місяців тому

    really good visualization of the process!

  • @antoniopellegrini8704
    @antoniopellegrini8704 Рік тому

    Fantastic video

  • @Rahul-bq6xl
    @Rahul-bq6xl 2 місяці тому

    You are a fuckin legend Dave. What a great explanation.

  • @brandoneickert
    @brandoneickert Рік тому +6

    I'm pretty sure what you refer to as "Amplitude Modulation" in the beginning is actually Amplitude Shift Keying (ASK) in the context of the modulation signal being a digital signal (which it is here).

  • @ka4dqe606
    @ka4dqe606 5 місяців тому

    Very useful bits. Thank you. Subscribed.

  • @HICHEMZIMI
    @HICHEMZIMI 9 місяців тому

    amazing explanation! thank you for the video

  • @algorithminc.8850
    @algorithminc.8850 5 місяців тому

    Great stuff. I look forward to scoping your channel. Thanks. Subscribed. Cheers

  • @ozzy35410
    @ozzy35410 4 місяці тому

    amazing explanation

  • @nohaelgammal4782
    @nohaelgammal4782 7 місяців тому

    I can't thank you enough!

  • @Z28videogates
    @Z28videogates Рік тому +4

    Another question - what is the minimum difference in power that the RX side would detect as a "different state" for power level? It would seem at more complex states like 1024QAM, if there were 10 different states, the percentage would not be linear like 10%, 20%, ... to 100% but rather in a way that puts it consistent with dBm out (and on the RX side, equal spacing of actual received levels). Would love to hear your thoughts on this. Thanks!

  • @CristianBeretta-k7k
    @CristianBeretta-k7k 7 місяців тому

    David, your video helped me a lot to understand more QAM.
    What software do you use to make these dynamic graphs?
    Thank you very much!

  • @Tuk_tuk_22
    @Tuk_tuk_22 8 місяців тому

    ❤this is amazing

  • @bn2davetube
    @bn2davetube 5 місяців тому

    Brilliant 👍

  • @Peaches.Gonsalez
    @Peaches.Gonsalez 16 днів тому

    I'm quite confused why OATV does not use the internet to Transfer 4k video and Dolby Soround Sound. Perhaps a big buffer to synchronize the signal, I have no idea. 🤷🏻‍♂️

  • @o2blom
    @o2blom 6 місяців тому

    Very good!

  • @subbox1
    @subbox1 Рік тому

    How am I only just finding this channel??

  • @chuywillis
    @chuywillis Рік тому +2

    Where can i find this simulator??

  • @Z28videogates
    @Z28videogates Рік тому

    @7:11 Can you please help - I can't find this info anywhere. What differences are they in WiFi in the actual real world? For example, if 1.00 = 10dBm, does .75 = 8.75dBm, .5 (half power) = 7dBm, 0.25 = 4dBm and 0.00 = ? Also, for more complex forms like 1024QAM, would it be 10 difference power level states? Thanks!!

  • @mdesm2005
    @mdesm2005 8 місяців тому +1

    what's a negative amplitude? (10:00)

  • @jrthhfdff
    @jrthhfdff Рік тому

    Phenomenal

  • @ahmadzaklouta
    @ahmadzaklouta Рік тому

    thank you

  • @dominiquelarchey-wendling5829
    @dominiquelarchey-wendling5829 7 місяців тому

    Could you explain how to get the filtering signal phase sync'd with the carrier signal ? Is frequency sync also an issue, because maybe there could be slight differences in the freq of the emitter and the receiver.

  • @webx135
    @webx135 2 місяці тому

    I'm mostly curious how it can distinguish between positive and negative phase. It seems like the starting point would matter, because if you are off by half a cycle, you would interpret all of your amplitudes as inverted.
    And then the same goes for determining amplitude. I can see how to do amplitude relative to each other, but not how to do absolute amplitude without a 3rd signal for reference.

  • @jeremy31678
    @jeremy31678 11 місяців тому

    Should not the top graphs be labelled A_I(t)cos(2pi*ft) & A_Q(t)sin(2pi*ft) beginning from 11:34?

  • @anlpereira
    @anlpereira 6 місяців тому

    Hi, I liked very much this video. In real world, how this could be implemented? I guess it is using op-amps. Is there some real world example you could show us? Thank you very much

  • @SABBIRIMON
    @SABBIRIMON Рік тому

    How dose ss7 works and ss7 encryption decryption explain

  • @xXThePr0Xx
    @xXThePr0Xx Рік тому +1

    In 8:10 you say, we have 2 possible amplitudes but I think this is wrong. The amplitude in a constellation is the distance from the origin to a point. The plot you showed visualizes QPSK/4-QAM, where the amplitudes should always be the same.

  • @ptsmonvideo
    @ptsmonvideo Рік тому

  • @marcioaugustotamashiro5940
    @marcioaugustotamashiro5940 Рік тому

    Very nice explanation, thanks a lot! Could you share your source code?

  • @PhuLeVan-no5qy
    @PhuLeVan-no5qy 7 місяців тому

    in 2.15: Why A(1- cos) ~ A

  • @tumblevveed3586
    @tumblevveed3586 11 місяців тому

    🤯

  • @PaulGarcia-h8e
    @PaulGarcia-h8e 3 місяці тому

    Desmond Well

  • @WonYYang
    @WonYYang 3 місяці тому

    ua-cam.com/video/4cQChi4n1UY/v-deo.html for simulation of QAM passband signaling with MATLAB

  • @Manus-hh1hd
    @Manus-hh1hd 7 місяців тому

    Modulation ka spelling galat hai

  • @WalkerLouise-j4u
    @WalkerLouise-j4u 3 місяці тому

    Garcia Mark Hernandez Gary Gonzalez Karen

  • @WonYYang
    @WonYYang 3 місяці тому

    ua-cam.com/video/KdLoMi-fIU4/v-deo.html for simulation of QAM passband signaling with Simulink