L 10 | QPSK | Quadrature Phase Shift Key | Digital Communication | Vaishali Kikan

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Subjects- Analog and Digital Communication | EMFT | Antenna & Wave Propagation | Digital Circuits | VLSI Technology | Optical Communication | Electronics Engineering | Science & Technology | Microprocessor | By Ms. Vaishali Kikan
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Hi Students, We at Vaishali’s e-Learning aim to provide you the best experience of learning. We know your requirements: Lectures at your preferred time, Simplified Lecture Notes, Illustration with simple examples and animations, and most importantly, the value of your time. We know you don’t want to listen to boring lectures, so we try to cover the topics in minimum duration. Also, you know that each topic can’t be covered in your university/ coaching classes. So we try to cover all the subjects in detail to make your learning experience much better. For further doubts, you can reach out to us on our app as well.
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[@vishalpal1692]

Thnk u so much Ma'am for all these videos of analog communication and digital communication and optical communication ... I watched most of them and found them to be very useful These many videos with lot of intensity and the creation of such videos speaks volumes of hardwork that u have done .

[@chinmoymaji6345]

madam, I have question on receiver section on QPSK. My question is why " raised to power 4" and why not " raised to power 2" if we raised to power 2 and then pass it BPF with 2f and then frequency divide by 2. then also we get same result.

[@dankkk1293]

Crystal clear explanation 👍

[@sanketnawale3546]

Thank you very much !! Your lectures are really helping me in my masters !!

[@Cat-ir8cy]

These videos are way clearer than the lectures we get at uni

[@sukritsyal7057]

which university?

[@dankkk1293]

Fact

[@komal1468]

Kindly recommend the book for digital communication

[@backupemail3273]

Introduction to Analog and Digital Communications by Haykin and Moher, 2nd Ed

[@rahulpahuja7645]

mam in wavefrom of odd bit multiplied by cos,why u shifted phase by different amount and for multiplying even bit by sin u shifted by different amount how u shifted the phase and by what amount plz tell?

[@ahmednnaeem8369]

very well explained... really helpful. thanks

[@NatureLover-oq6uc]

Very good explanation mam🙏

[@pritambharti2474]

at 15:51, we are getting output kt*bo(t) but you are telling we are getting bo(t), you are skipping something, please explain so that I could understand completely, thank you

[@kowdivigneshwara4567]

Is this coherent detector or non coherent detector plz clear this doubt.

[@varadpawaskar8967]

When we raise S(t) by 4, is there a frequency increase or an amplitude increase in the overall received signal?

[@ankitpandey1588]

Maam phase change that you speak about (10 as pi/4, 00 as 3pi/4, 01 as 5pi/4 and 11 as 7pi/4 ) is there any specific reason behind this or this is standard? Any way to deduce this by basic info that pi/4 is the phase change between two bits?

[@VaishaliKikan]

Yes I have explained that too with the diagram when I took sin cos both positive or both negative or one of them positive.. Happy to help you.. Thank you so much for your motivating comment.. Stay connected for upcoming videos..

[@ankitpandey1588]

@@VaishaliKikan Thanks you maam. I got it.

[@snehabiswas7531]

Ma'am in receiver, why we are not taking √(PsTb) in the equation of s(t) ?

[@VaishaliKikan]

√PsTb represents the amplitude and in PSK, the output does not depend upon the amplitude, rather the information of the signal is contained in the phase so you can neglect √PsTb..

[@snehabiswas7531]

@@VaishaliKikan okay maam thank you

[@pritam6287]

Thank you madam. It is really helpful video for me

[@VaishaliKikan]

Thanks for your feedback and for connecting

[@prateek17388]

the step afte [ root2 Ps coswt+ root Pssinwt] is not clear. can you please tell me what is written

[@MalluStatusorld]

I love that energy 👌👌. Are you doctor

[@VaishaliKikan]

Thanks for your feedback and for connecting I am still not having PhD degree

[@mr_playboychenna3652]

Superr class

[@sebastian33458]

WoW!!!

[@VaishaliKikan]

Thanks for your feedback and for connecting

[@yadavgopal2854]

Mam where can i get notes for this all lec of digital communication

[@piyushchaudhary6893]

samjhh ni aaya pr hnn sun k achaa lgaa

[@GenwinReview5m]

Plz explain how iq signals combine with these modulation techniques in rf communication

[@VaishaliKikan]

I am working on analog communication.. There you will understand it.. Stay connected for upcoming videos..

[@itsmycutelittleworld69]

Nice explanation mam..😊 I understood very well

[@VaishaliKikan]

Happy to help.. Hope you will again visit the channel and get benefited.. Thanks for feedback 😊

[@abubakarsiddu3455]

Like u r teaching

[@meetsasam1]

beautifully explained ... respect and gratitude from Pakistan

[@VaishaliKikan]

Thank you so much.. Happy to help you.. Stay connected for upcoming videos..

[@gkbvines5148]

Mam you not uploaded video

[@lohitpanduri7990]

Mam bodd{t}KT is coming in receiver what does KT represent mam?

[@VaishaliKikan]

K represent the number of cycle T represent the particular instant Thank you so much for your feedback Stay connected for upcoming videos

[@Futureviewer]

i dont understand but i am stilll like her

[@abhishekbhujwa3030]

Thank you.. Great explanation..

[@VaishaliKikan]

Thanks for your feedback and for connecting

[@cuber9392]

Better video when you talk in Hindi

[@rahulpahuja7645]

mam plz tell as soon as possible

[@ankithreddy7827]

Nice

[@VaishaliKikan]

Thanks for your feedback and for connecting.. Stay connected for upcoming videos

[@MalluStatusorld]

I mean a PHD holder ?

[@VaishaliKikan]

Thanks for your feedback and for connecting

[@harmanpreet2413]

Good explanation but written text is not clear its very untidy!

[@VaishaliKikan]

Maybe you are watching the video in auto quality. From the upper right side 3 dots chose 1080 pixel quality, it will be clear then. Otherwise you can take screenshot in high quality and then watch the video.

[@funlearning5989]

ya topic aisa hai hi dopamine release hi naa hoo rha

[@simplyvlog5749]

Mam, u r so beutiful😍

[@kattasagar6323]

Akka kocham waveforms big ga rai akka

[@ballichib815]

Mam hindi me videos dala kijie sab aapke jitne qualify nhi hote

[@dragonbhai3196]

I don't know why I am watching this video 😂

[@bhawanisingh977]

Mm'm looking very beautiful

[@VaishaliKikan]

Thank you so much for your feedback.. Stay connected for upcoming videos..

[@maxspane1437]

You look cute❤️🔥

[@subhadeepkhan5470]

board se haat jaya karo dikhai nehi deta

[@gkbvines5148]

Mam you not uploaded video

[@gkbvines5148]

Mam you not uploaded video