Energy and Power of Discrete-Time Signals

[@MateusHufnagel]

Thank you so much. This is just what i was looking for.

[@varunsingh9432]

sir i request you that please post some more videos including complex problems otherwise major problem example will remain unbound

[@preetijha9581]

thank u sir.. pls upload the lectures of Fourier transform , laplace. and dft as soon as possible.

[@pknayak93]

The 1st pat of suumation will be -ve infinity to -1 instead of 0. because x(0) is not equal to zero.

[@snigdhakhanna3248]

Sir we know that P = E / T and putting in the limiting values we get the formula as P = lim T->inf [(1/T) * |{x(t)}^2| , then why do we write 1/T as 1/(2N + 1) here in this video? Also, Thank you so much for this series Sir! :)

[@dipesh1401]

-n to n denotes total time intervals... So summation of -n to n will be 2n+1 which denotes total time... And power=e/t: where t=2n+1

[@jazminmosqueda8263]

How do you write so well on the screen??? :o beautiful !

[@charliewalsh6890]

with a pen on a tablet

[@rovibb2128]

@@charliewalsh6890 lol

[@srialekhya7248]

lol:)

[@srwwww99]

Lol 😂😂😂😂

[@jimjohnson357]

In the second example, why did you have to calculate the energy to be infinite to determine that it was a power signal? You already found that the average power was finite. Does this not automatically mean that the energy must be infinite and that it is therefore a power signal? (without needing to explicitly do the calculation for energy?)

[@prakashchandrajat9752]

plzz take some more complex example so that our concept will be crystal clear like you have done in digital

[@ajithuddavolu2683]

is it power or average power

[@prakashchandrajat9752]

nice sir

[@asimelfadil7823]

i didnt understand anything . how did you get the n(n+1)(2n+1)

[@raghunandan2470]

These are some standard summations from pu.. Please refer internet for solutions

[@saujanyatiwari]

go and study AP in mathematics.

[@thiagomarchesan9412]

Here it's explained: www.khanacademy.org/math/algebra-home/alg-series-and-induction/alg-sum-of-n-squares/v/properties-to-find-sum

[@himanshukumarshekhar2711]

Sir, Average power or power , both are same ? Sir

[@girishbp6349]

When we have use limit (N=>infinity) And summation of N to -N

[@basheerbasha2752]

Sir.in the above examples both the signals are defined from - infinity to + infinity at every value.i.e ramp signal from - infinity to zero is zero and zero to infinity is n. And dc value is A from - infinity to + infinity. Then how they can be discrete signals and why you used discrete signals formula to solve them. Please explain sir.previous I have asked another question in even and odd signal you are not answering.

[@abdelrahmansamy9112]

Its sampled signal from continous time ramp signal so its discrete It doesn't defined in between the sample interval

[@toivoxiong4541]

are you playing bike race? 🤣

[@ayusharipirala3121]

What is the reason for taking 1/2n+1?

[@devendramalviya5527]

i dont understand it clearly how x(n) neither power signal nor energy signal......can u give another practical exmple and by the way ur video are very good compare to other boring videos

[@abhayawasthi163]

when signal is unbounded signal than it is neither power nor energy signal and power and energy both are infinite always

[@vaishnavimunj3054]

Summation of 1 does not consist of n term then where did you put -infinity and +infinity terms? And concluded its equal to infinity? Plz explain

[@ASMRKing1997]

how about exponential signal signal sir. thank you for the lecture by the way.

[@guddankaur9511]

6:06 What is T here? I mean whose time period? x1(t) or x2(t)

[@zainulabidin7013]

please solve those examples in which trignometric identities are used

[@mrpotatohead1227]

I know this is late, but for future people seeing this: In discrete time, the energy of periodic signals is infinity. sin and cos being periodic signals (T = 2 pi), the power is infinity. At least that's what my professor told me.

[@alien77333]

@@mrpotatohead1227 please elaborate

[@TravelAndTastes]

How to calculate power/energy of DTS 6u(n)-3u(n-1)? Plss reply

[@roshankumar2555]

Consider the above signal separately for instances x1(n)-x2(n).

[@yogaanand1348]

can current through an inductor and voltage through a capacitor considered as a energy signal.?

[@abhayawasthi163]

yes because anything which is finite is energy signal none of the power supply will give you infinite energy so it is correct and as by concept an inductor and capacitor can never exist as a single element in circuit

[@saadahmad9883]

Well i am having a hard time understand that how 1 is equal to 2N+1

[@apostolosmavropoulos177]

1 is not equal to 2n+1 .THE SUMMATION OF ones(1) from -n to +n is equal to 2n+1. for example* the summation of ones(1) from -2 to 2 is 5. 2n+1 for n=2 (upper limit of Σ) equals 5.

[@shubhamide]

i can't understand it. in summation of 1 there is no term that is including N so how can he write 2N+1

[@thiagomarchesan9412]

www.khanacademy.org/math/algebra-home/alg-series-and-induction/alg-sum-of-n-squares/v/properties-to-find-sum

[@chownatalie2234]

what does N mean actually

[@dipesh1401]

It is time in discrete signal

[@estebanulloa7620]