QPSK Quadrature Phase Shift Keying (Basics, Modulator, Waveforms, Demodulator & Applications)

QPSK Quadrature Phase Shift Keying is explained by the following outlines:
0. QPSK Quadrature Phase Shift Keying
1. Basics of QPSK Quadrature Phase Shift Keying
2. QPSK Modulator
3. QPSK Demodulator
4. Waveform of QPSK Quadrature Phase Shift Keying
5. Significance of QPSK Quadrature Phase Shift Keying
6. Applications of QPSK Quadrature Phase Shift Keying
Chapter-wise detailed Syllabus of the Digital Communication Course is as follows:
Chapter-1 Basics of Digital Communication System: • Introduction to Digita...
Block Diagram of Digital communication system, Advantages, and disadvantages of digital communication system, Scrambling, Regenerative Repeater, Eye Diagram, Attention of signal, Bit rate and Baud rate.
Chapter-2 Digital Modulation Techniques: • Digital Modulation Tec...
Amplitude Shift Keying ASK, Frequency Shift Keying FSK, Phase Shift Keying PSK, Differential Phase Shift keying DPSK, Quadrature Phase Shift Keying QPSK, Binary Phase Shift Keying BPSK, M array Frequency Shift Keying MFSK, Quadrature Amplitude Modulation QAM, Comparison of QAM and PSK.
Chapter-3 Pulse Digital Modulation: • Pulse Digital Modulation
Sampling, Aliasing, Nyquist rate, Types of sampling, Performance comparison of sampling, PWM - Pulse width modulation, PPM - Pulse Position modulation, Performance comparison of PAM, PWM and PPM, Quantization and its parameters, SNR of Quantization, Uniform Quantization, Pulse Code Modulation PCM, Nonuniform Quantization, Companding basics, A law and Mu law for Nonuniform quantization, Differential Pulse Code Modulation DPCM, Delta Modulation DM, Adaptive Delta Modulation ADM.
Chapter-4 Multiple Access Techniques: • Multiple Access Techni...
Examples on TDM, Examples on T1 carrier system.
Chapter-5 Line Coding Techniques: • Line Coding Techniques
Basic of Line Coding Techniques, Pulse shaping techniques, NRZ, RZ & Manchester coding, PSD of NRZ unipolar line coding scheme, PSD of NRZ polar line coding scheme, PSD of NRZ bipolar line coding scheme, PSD of Manchester polar line coding scheme, Comparison of Unipolar, Polar, Bipolar and Manchester Line coding scheme.
Chapter-6 Information theory: • Information Theory
Basics of Information, Basics of Entropy, Shannon Fano Encoding, Huffman Coding, Lempel Ziv Coding, Shannon Hartley theorem, basics of probability, Random variables, Cumulative distribution function CDF, Probability Density function PDF.
Chapter-7 Error detection and error correction codes: • Error Detection and Er...
Block Codes, Hamming Codes, Linear Block Codes, Cyclic Codes, Convolutional Codes, Code Trellis, Viterbi Algorithm, Block Codes for single parity checks, Block Codes for product codes, Block Codes for Repetition codes, Cyclic codes for a systematic codeword, Cyclic codes for nonsystematic codeword.
Chapter-8 Spread Spectrum Modulation: • Spread Spectrum Modula...
Basics of Spread Spectrum Modulation, Frequency Hoping Spread Spectrum FHSS, Direct Sequence Spread Spectrum DSSS.
Engineering Funda channel is all about Engineering, Technology, and Science. This video is a part of Digital communication.
#QuadraturePhaseShiftKeying #QPSK #DigitalCommunication @EngineeringFunda

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[@chinmaymahindrakar7988]

00 is 0⁰ 01 is 90⁰ 10 is 180⁰ 11 is 270⁰

[@NaharNahar-emf]

Excellent sir. It will very much help to me. I always folllow yor class..

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[@pushpeshjoshi9439]

Very Clearly and from zero level explained

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[@sabinshrestha7196]

At 9:25, shouldn't the PSK-I be connected to the even bit and the PSK-Q to the odd bit? It's the opposite in the video.

[@istkhararman]

@@sabinshrestha7196 because in first we have to do modulation but here we are doing demodulation that is the opposite of modulation so here we connect opposite Got it ?

[@Onlinelearning-ir2dc]

Thanq sir. It's really helpful for us

[@EngineeringFunda]

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[@kaviyar-ece788]

Sema explained sir thank you

[@EngineeringFunda]

Thanks and welcome

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[@BunkerSquirrel]

Thanks Funda, very cool!

[@arunpandi22356]

Good lectures sir thank u

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[@reddyred5220]

Gd explanation brother

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[@markhofmeister702]

Hello sir very nice video sir thank you sir

[@EngineeringFunda]

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[@armanghasura9410]

Wonderful 👌 Sir Thank you Sir 😊

[@EngineeringFunda]

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[@armanghasura9410]

@@EngineeringFunda Sir, on 28 December I Had a GTU Exam of 5th Semester of VLSI Subject and this QPSK Modulator is for 7 Marks and this Videos help me lot of.... Thank you Sir 😊

[@amiger1412]

Thank you, its very clear

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[@_swaroopmv_4058]

Good explanation sir

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[@doosaribharathgoud2358]

Thank you very much sir

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Your Appreciations, care and share matters a lot to me. #EnginneringLove. All the subjects playlist of Engineering Funda is available in comment section. Share it with your friends to support us. Your positive comments motivates me and person like me get boosted by my students feedback. Thanks and welcome 🙏

[@vivekchavan4853]

Very very nice 👍

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Your Appreciations, care and share matters a lot to me. #EnginneringLove. All the subjects playlist of Engineering Funda is available in comment section. Share it with your friends to support us. Your positive comments motivates me and person like me get boosted by my students feedback. Thanks and welcome 🙏

[@aniketrajapure8251]

very clearly explained, thank you

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[@Yukithakumar]

Thanks a lot sir

[@EngineeringFunda]

All the subjects playlist of Engineering Funda is available in comment section. Share it with your friends to support us. Your positive comments motivates me and person like me get boosted by my students feedback. Thanks and welcome 🙏

[@eepassion9720]

Thank you so much. That help me alot.

[@Paperid_osamabinladen]

❤❤❤❤❤❤

[@EngineeringFunda]

Your Appreciations, care and share matters a lot to me. #EnginneringLove. All the subjects playlist of Engineering Funda is available in comment section. Share it with your friends to support us. Your positive comments motivates me and person like me get boosted by my students feedback. Thanks and welcome 🙏

[@dangvunam]

the phases for QPSK are 45, 135, 225 and 315 instead of 0/90/180/270 as in the video? Plus, I expect to see the photodiodes in the Receiver block..

[@madhumathis-ul8wp]

The phases need not be fixed values such as 45 or 0, there just should be 90 degreee difference between each phase

[@viveksingh7388]

How you decided that phase shift to each dibit(2 bits)?? like for 01 180 degree

[@abhijitkumarmanna2031]

QPSK works on phase shift,the symbol / msg is in the phase of the carrier. Go through the generation of qpsk u wil know

[@VishalYadav-dl9mr]

Sir please explain What is the full form of BPSK-I and BPSK-Q???

[@madhumathis-ul8wp]

The “in-phase” or reference signal is referred to as “I,” and the signal that is shifted by 90 degrees is called Q

[@mdafrath2824]

I need expression for qpsk

[@srini6030]

Kindly put a videon on offset QPSK and pi/4 QPSK

[@lavanyaleelakrishnan400]

Sir, for 01 it is 90° phase shift and 10 it is 180° phase shift na sir??

[@Manish-ly7iw]

Yes bro

[@vananidharmik5306]

Very Good Explanation

[@rudieadinfinitum8508]

Very clearly explained, thank you. One question: why do you draw 2 cycles to indicate a phase shift, and not just one cycle?

[@EngineeringFunda]

By two cycles it can be observe clearly

[@rudieadinfinitum8508]

@@EngineeringFunda Thank you. So two cycles are not actually needed in reality. One cycle normally is sufficient. Thank you, and have a nice day.

[@darkbeatz9783]

Sir add constellation diagram video

[@abhiramanne9649]

wonderful

[@EngineeringFunda]

Your positive comments motivates me. Teachers like me just wants positive comment from student. Love from you guys means a lot to me. My goal is to create largest community of engineers in entire globe. Please help me by sharing this playlist with your friends.

[@abhiramanne9649]

@@EngineeringFunda great

[@ahmedjamil880]

Thank you so much doctor for your valuable efforts. I have two questions I hope you reply it. Q1) Is QPSK the same PSK that has L= 4 ? Q2) DPSK is convert the signal from digital to analog or not?

[@EngineeringFunda]

1. Yes it is same.

[@EngineeringFunda]

2. This digital modulation scheme, where we represent digital data (0 , 1) into analog form.

[@ahmedjamil880]

@@EngineeringFunda thank you so much for your replying with my best regards

[@amalkrishnan8823]

What are you mean by bsk i channel and bsk q channel. Should it mean in-phase or quadrature phase component

[@jaakjensen]

This video is overall an OK explanation of QPSK but it is missing an important piece of information, which is that the bit splitter is also an NRZ encoder. This confused me and I thought that the BPSK Q and I signals were multiplied by 0 and 1, rather than +1 and -1.

[@vibetime7930]

what is nrz encoder

[@jaakjensen]

@@vibetime7930 an NRZ converter takes an input signal with an amplitude of 0 to 1 and converts it to a signal with an amplitude of -1 to 1.

[@anti-tankartur677]

you mean a bipolar NRZ?

[@rahulmishra800]

​@@anti-tankartur677Yup Mr Tank Buster

[@FFGAMING-dr4dh]

Is band pass filter necessary after BPSK i channel and BPSK q channel and even after linear summer circuit ??

[@csmukund860]

thank you saaarrrrrrrrr

[@EngineeringFunda]

Your positive comments motivates me. Teachers like me just wants positive comment from student. Love from you guys means a lot to me. My goal is to create largest community of engineers in entire globe. Please help me by sharing this playlist with your friends.

[@aadityasadangi]

in demodulation, wont the 90 degree phase shifted (PSK q) go to the odd bit

[@ecerahuljain]

Nice video sir

[@amitbarnwal4609]

Sir why q channel 90° phase shift where as I channel o° phase shift????

[@LucienVT]

Could you do in multisim modulation and demodulation QPSK i would like to learn how to make it with all the math that i need fb... B... Etc because i know the theory but idk how to make in practice

[@ibrahim-zm9bc]

Thanks

[@EngineeringFunda]

Your Appreciations, care and share matters a lot to me. #EnginneringLove. All the subjects playlist of Engineering Funda is available in comment section. Share it with your friends to support us. Your positive comments motivates me and person like me get boosted by my students feedback. Thanks and welcome 🙏

[@soumyokantichakraborty5512]

please make video on offset qpsk and alsp pi/4qpsk

[@sajinip5616]

Sir in modulation we give even to 'I' and odd to 'Q'. Then why do we give exact opposite in demodulation?

[@HarroldWesterling]

I think sir has made a mistake there, It must be same.

[@muditpareek1581]

Why 01 is 180 degree and 10 is 90 degree and 11 is 270 degree???

[@OmPatel2110-f8m]

Its mistake

[@viewstar2902]

in this video plz check at the point of "1, 0" should be for 180-degree phase shift/ 01 for 90 degree

[@viewstar2902]

time point 5:10

[@jaya2814]

Thank u sir

[@TEENACHOUDHARY-r5f]

if even bits go in even block then how to get know it is 00 or 11

[@aryanaryamusic]

00 should be opposite to 11, as in their phase difference is 180deg. Same applies for 01 and 10

[@christina_a17]

I have a multiple choice question: A signal 2-ASK with data [1001] and with an initial phase of 0 degrees added with a signal 2-ASK with data and with an initial phase of 180 degrees, the result of the summing would be: A)Signal FSK B)Signal BPSK C)Signal QPSK D)Signal 4-ASK Can you help me please because a have a test

[@EngineeringFunda]

BPSK

[@christina_a17]

@@EngineeringFunda thank you

[@EngineeringFunda]

Sorry it was mistaken

[@christina_a17]

@@EngineeringFunda are you sure ?😝

[@EngineeringFunda]

Yeah

[@MrRakhange]

Can u please show modulating signal which is in 00 01 format in wave forms

[@remanithin2383]

😍😍😍

[@EngineeringFunda]

Your Appreciations, care and share matters a lot to me. #EnginneringLove. Let me give the details of few exciting features of Engineering Funda: 1. A link to more than 30 Courses is given in the Comment Section. 2. Detailed Syllabus of the subject along with chapters is given in the description of videos.

[@wcperez]

with the BIT splitter, how can you send the '11'?

[@NazibahMaimun]

how can i do "generate qpsk analog signal for the digital data 11011000"???

[@rajkamaldey6168]

QPSK, at the time of modulation odd bit go through 90 phase shift channel, in demodulation time even bit go through 90° phase shift channel why?

[@mohithpg2396]

Point

[@santhoshreddymula9744]

please upload probability of error in digital communication

[@goham2558]

Bit error rate? can be found on slide 3 of web.eecs.utk.edu/~hli31/ECE441_2013_files/lecture4.pdf

[@susheelapatgar3640]

Sir u should have shown even bits waveform and odd bits waveform before drawing QPSK o/p waveform because i had referred your notes only. And today in exam i did the same what u have told in this video but i didn't take even&odd bits waveform.I thought that we should take pair of bits in a given sequence.🤦 i m gonna loss my marks😔😥

[@sohamroy7668]

This guy doesn't have the concept clear to himself. And he goes on to make a video on this topic

[@Moments_of_Mounika]

Tq.. so much sir

[@rajeshsattineni4878]

How did u take phase shifts??

[@vaibhavchandnani8699]

Please make the video on minimum key shifting

[@mst.jesminakhtar3043]

the full form of MPEG is Motion Picture Expert Group

[@deekshaparab7146]

Sir plz make video on BIT synchronization and its type plz I have my exam on 27 November

[@vishalsingh-ym7ff]

exam kaisa gaya?

[@shubhamgokhale505]

Sir plz make video on non coherent BFSK

[@AhamedKabeer-wn1jb]

Thanks sir...

[@sidda.vahini9906]

Pls explain constellation diagram and phasor diagram of qpsk

[@zaurzeynalov7849]

Wyfog

[@Prince_YO1]

Explain waveform with different bits

[@kanchigupta30]

please explain how serial and parallel data is making QPSK

[@lifemax_]

Sir is there verilog code for qpsk and bpsk

[@upl753]

Apki video mai advantages and disadvantages nhi batye hoye Next video bta dena

[@sameerbilla515]

how can we get 00 and other 3 terms... ODD and EVEN?

[@shahnaps3442]

Bhai iska Conceletion diagram bhi samja do

[@AjayKumar-ul2dg]

nice explanation but lots of error in the video.

[@ashokask2623]

Is there Any problems on qpsk

[@navinsada1101]

💋💋💋

[@sushantsharma-f5p]

even split odd split?

[@venkatarohith419]

Mathematical equations for qpsk do

[@acoolofficiel589]

please can you show the Program for its in Matlab mit awgl kanal?

[@DannyFraser-y7h]

Walker Curve

[@tunasahin4349]

I have a homework question. Can you support this topic?

[@zaurzeynalov7849]

Zaur 🌒 tykf Dağ Dff Dfjdgrksg

[@LauriePage-p1e]

Godfrey Walks

[@ClassicFlush-c8u]

Miller Spur

[@rehanmaner2097]

Can you please snd me these notes or upload it somewhere so we can access it

[@joserusefni-e2t]

Cameron Throughway

[@mst.jesminakhtar3043]

satellite communication of MPEG 2. not mpact 2, please correct it.

[@aishwaryasrivastava3998]

I dnt know why but sir ke lecture aadhe lagte hai .... aisa lagta hai he is trying to explain the stuff but at the same time missing something .... complete clarity ni ho pati topic ki.... plzz sir ispe work kariye ... Har ek part ko achche se bataiye .... Samjhne me dikat hoti hai.... itz a humble request ..... koi bhi topic pe according to syllabus complete vedios banaiye plzzz

[@RB-kj3qe]

90 degree for 01 and 180 degree for 10

[@arkadiptadas4148]

Why?

[@tharunprathapan5883]

@@arkadiptadas4148 for every single bit change in the signal there is 90 degree phase shift

[@prakhyatkhatiwada3128]

if you could post signal space diagram of dpsk

[@armygirl-iv1gs]

Advantages and disadvantages?

[@CalandraMcgrew-t5g]

Breitenberg Haven

[@HumeKristin-v1e]

Lyric Alley

[@ChristopherJoy-j5d]

Stacy Prairie

[@ToddOquendo-x2l]

Daugherty Manors

[@OliverConstance-h4d]

Deja Lake

[@CecilliaChapman]

440 Allen Lake

[@purvipatel5678]

why there is 180 phase shift for 01 it should be 90

[@vananidharmik5306]

In modulator : even bit give to bpsk i channel and In demodulator : even bit given to psk Q channel Why this happened?

[@DanielForrest-m2z]

Arlo Curve

[@WalterSherrill-w2z]

Emelie Mill

[@ZaneWassenberg-d2i]

Hessel Turnpike

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Jakubowski Lights

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Feeney Field