วีดีโอ

good

Amazing! Thank you very much

Nice

Thanks Mam, very effective lectures in the whole playplist, I am following it to revise the whole course

Thanks Professor

thank you very much

merci beaucoup

merci madame pour ce contenu

omg, finally i get it, thanks!

Thank you so much Professor for uploading videos about CMA! Before this, I couldn't find any content on CMA on TH-cam. Your efforts are greatly appreciated. Could you please consider making a video explaining the mathematics behind CMA? That would be really helpful. Thanks again!

Hi, thank you for awesome video. At 10:27, the fractions inside of Q functions for P_e of BPSK and BFSK looks the same at the end. I think there is a typo for BPSK case.

Great Job! Congrat!

great video

I've been in the business for many years, your teaching methods are awesome.

the link was invalid in the end of the video . Could you please update the link?

Dear Professor, thank you for this detailed explanation. I have 3 questions and would be grateful to get responses from you or recommendations for what to read. 1. Is the modulation at the subcarrier level not actual modulation in the sense of varying some aspect of a wave (phase, amplitude, frequency, etc) to embed information? Is it simply a mapping between data bits and our choice of points on the constellation diagram? 2. From the IFFT module we get complex numbers e.g. a +bi. If we use 64 subcarriers, I understand that we would get 64 time samples i.e. 64 different complex numbers. Now how are these 64 complex numbers combined to form a single symbol to be sent? 3. For the actual transmission, does a (real part) modulate the cosine while b ('imaginary') part modulate the sine? in other words, what is the physical process for going from the complex time samples into physical voltage variations that results in RF emissions. The 5GHz oscillator you mention going to be split into one cosine and another sine (90 degrees out of phase), have these individually modulated and then the modulated sine is combined with the modulated cosine before finally being used to induce voltage changes at the antenna feedpoint..? Merci

I can never thank you enough for uploading your lectures on the public platform for free, they are truly a goldmine. I was failing to understand communication system since first year at varsity, but through watching your lectures im happy and grateful for the comm. systems intuition and understanding that i have gained.

merci madame

This is the explanation I’ve been looking🙌🏾

Best explanation, your lectures are top notch

it is very useful explanation, thank you very much

Thanks for the illustration! But seems that the last four minutes of the video is all black has no audio

Much Appreciated Professor.

I think it's backwards at 9:46. Ergodic is always stationary but not vice versa. Iaian Explains Signals has a nice video showing this.

This is an amazing video! Finally I understand this topic!

I need an English translation to Arabic please ❤

Thank you for these videos. You’re awesome!

Hmm nice try but things are quite complicated then what is presented...but this lays out a very good foundation

Perfect!

x(t)*delta(t-tau) = x(tau) Isn't it?

Mam, with your explanations anyone can master the book by Sklar. Is there a place where each page of the book is discussed via a video like it is done here !!

Hey I just wanted to say that, as a network engineer who is trying to learn more about RF without getting neck deep into math and physics, this video was amazing! You explained it in a very approachable way that sitll had a great depth of information.

Mam, you are so good that I am watching all video even when I am not enrolled 😇🤩 Many Many Many ... Thanks for sharing your knowledge.

you are no less than God .... many many thanks yr teachings . All your videos make an excellent resource for students.

Thank you so much

Thanks a lot Prof. Leslie; Please, I have very interesting question, I'll so appreciative to you if you have precise answer for it, the question is about how we can theoretically calculate the cut of frequency of the raised cosine filter for OFDM signal (pulse shaping) before driving the IQ modulator for frequency upconversion from baseband to RF carrier? Please, I'm so need your help about that from your experience and deep knowledge in this regard. thank a lot :)

Each s carr is 15khz So 20000/15 is about 1200 carriers in DTV

very good explanations, thanks!

2023.07.14 감사합니다.

2023.07.14 감사합니다.

2023.08.14 가사합니다.

2023.07.14 감사합니다.

2023.07.14 감사합니다.

2023.07.14 감사합니다.

This is done quite well! Glad to have stumbled upon this lecture.

Hi, thank you for your lecturing. However, I think that the code words from state b to state c should be 001 and 101. Please check it. Thanks.

I don't know why I learned OFDM from another person while there is a great explain like this, really thank you very much.

Thank u very well explained

Well actually what you are explaining here is CNR or carrier to noise ratio and the relation to eb to no. SNR or signal to noise ratio is something different. CNR and SNR are related but slightly different metrics used to assess the quality of a communication system. CNR is specifically focused on the ratio of the received carrier signal power to the noise power, while SNR considers the ratio of the desired signal power to the noise power. CNR emphasizes the carrier signal, while SNR encompasses the overall signal quality.

when you take (t+tau)=z, you have to change dtau accordingly too, right?