Відео

The video doesn't explain how errors are actually corrected. The Wikipedia article for Reed Solomon includes descriptions and example of 3 decoders that can correct errors, under the section "BCH vew decoders".

Thanks for the video! Why is the modulo of X^4 with P(x) is {X^2+X} and not -{X^2+X}? Thanks!

17:08 c(x) = (x²+1)(x³+x+1) = x⁵ +x ² + x + 1?? It's CORRECTLY?

Unfortunately, I was unable to reproduce this solution. When using W_est = ((H'*H) + sigma2 * eye(N_rx)) \ (H'), it works perfectly. However, when trying to compute it from x and y (i.e., W_est = (R_yy + sigma2 * eye(N_rx)) \ R_xy;), it doesn't work as expected. After some manipulation, I found the following working solution: W_est = ((R_yy + sigma2 * eye(N_rx)) \ R_xy')';. Could you confirm if this is correct? (Note: these equations are written in MATLAB syntax.)

Who is Si DSP corp? A virtual mom and pop operation?

Thank you!

Excellent!

woww thank you so much ❤ 20:00 is exactly what I found for many days T.T like, I understand the IFFT freq/time domain, sum of the signals (I mean the X_k * exp(..) signals)... concept, but I kept wondering how to map these before-IFFT signals map to frequencies of the subcarriers (like 0, 30, 60,... kHz), because the frequency of IFFT and (0,30,60,... kHz) are totally different ^^ now you saved my days ❤❤ Thanks a lot

So training sequence will be for how much time? Shall there be N elements in training sequence since there is N taps?

This series is excellent. You did a great job. Thank you.

how many states must be taken for 6 shift registers with 3 outputs ??

Why is CP length of 800ns not sufficient to combat delay spread of 200ns(leaving a residual in the next symbol in example shown)? What is the relationship between relation between minimum CP length required given a doppler spread?

Wonderful nice explaining 👍

Thank you for the excellent presentation. Maybe I missed that part, but how do we lock to the incoming data packet frequency, so that sampling begins more or less at the start of the packet?

One of the best explanation ever on this topic!

Can be embedded any spyer sub carrier? #geohotz

Why do we need to copy. Why can't we just generate the 80 samples directly from the IDFT? That should yield the exact same result. No? What did I miss?

This is so valuable! Thank you. I was doing some frequency offsets of IFFT length 3072 OFDM literally today and noticed an exponential decay instead of a frequency and phase shift. Had forgotten the “j” in the exponent. Most of your slides here mis this as well. We’ll be fine though

This video is very good! BUT WHY THERE IS NO EXAMPLE FOR ERROR LOCATING AND CURRECTING ?! There was an example for generating codes with rs in GF(2^3) and it was very useful but in decoding stage we had just formulas!

at10:00，Dynamic Range should be 52dB, rather than 62dB.

In wireless communication, I wonder about what people are referring to when they use the term 'channel tap.',or 'delay taps' or 'doppler taps.' Can someone explain the term or provide me a definition? Any help will be appreciated!

Great video on a practical topic not covered by others!

i do not understand how to calculate the 0.835dB that pop up at the minute 19:44. Please can you explain it?

Thank you for explaining what is adjacent channel rejection!

Great overview of benefit of MIMO

Thought it was 567MHz in the figure, not 5GHz 14:56

S(f) lacks a minus sign in the exponential 2:16

Excellent presentation, many thanks!

very nice material!

Excellent tutorial, with sufficient explanation for each slide rather than rushing through excessive slides, very understandable THANKS!!!

Great tutorial! if it can include under what condition there will be CPE impact and what condition will be ICI dominant, that will be best

what is the meaning of (long runs of low reliability LSP) in the second step permutation

any book study about performance analysis of MIMO-OFDM?

hello sir if the locations of the pilots are fixed without any changing, we will have spectral lines in the spectrum. why? what is the meaning of lines in the spectrum? thank you

You have explained the detection and difference because of correlation and autocorrelation with so much clarity, and also the effect of Delay spread for both cases. Really appreciated.

Just an amazing series. Thank you, sir. I really appreciate the work and time you have put in to make this series Dr. Sasan Ardalan.

In 46:40, i think $X_l = \gamma_j^{l}$ should be corrected as $X_l =\gamma_j^{j_l}$. Am I right?

Hi 1- @7:36 how can the AGC come after the ADC blk ? isn't supposed to be before ? 2-@9:49 top of slide it is mentioned transmitted samples after DFT of carriers , do we take the DFT of the subcarriers to get signal in time domain ? 3-@9:49 if the phase offset is function of time then why at sample n in time you did not account for the phase shift due to the time spent in the guard period Ng ? you are only accounting for phase offset due to signal starting from sample 0 to sample n

What is the order of the video? Can you add index to be able to follow correctly

At 18:42, why the FFT length is equal to the total number of subcarriers?

Thank you a lot for this series. Really comprehensive explanations!

Pure Gold, thank you

Thank you very much for this lecture. The only lecture I found easy to follow after thorough research.

0:30.. I think it is more appropriate to say the codes were invented. You discover something when it was existing already but invent something which did not exist before.

What is the relationship between modulation scheme and fft length?

16:40 I think it's interesting that a transmitter can send a known pattern that helps each receiver develop its own multipath fading graph. I wonder if anything interesting would come of aggregating all those multipath fading graphs from many receiving locations, and over time. Could some sort of map be built of scattering/reflections in the transmitter's environs, a sort of passive radar?

I am here to understand some of the theory behind digital broadcasting standards, like ATSC, Digital Radio Mondiale, and HD Radio (MA1 and MA3). Thanks to Silicon DSP Corp for this series!

can you share this presentation ?? a link in description may be...?

Perfect explanation

Perfect explanation