007 Basics of Wireless Communication Part 2

[@bnjyable]

Thank you so much for these videos, I'm working on my first wireless project right now and these have been a huge help so far. Can't wait for the rest!

[@HB9BLA]

You're very welcome!

[@4LM3R]

You are a very interesting person with even more interesting content. Me as a beginner in RF am learning a lot from you. Thank you for all of your videos about everything on both of your channels! Greetings from the Netherlands!

[@HB9BLA]

I am glad you can learn something. This channel was founded for interested people who want to get more involved with wireless and RF...

[@chuxxsss]

Morning Andreas, keep it up.

[@HB9BLA]

Now it is morning here. Good evening ;-)

[@chuxxsss]

@@HB9BLA Check you Messager mate.

[@marksterling8286]

Exactly video thank you.

[@HB9BLA]

You are welcome!

[@billyjoe3309]

This is extremely helpful !!

[@HB9BLA]

Glad you think so!

[@olipito]

really appreciate your content, please keep it up. The explanations were clear. I understood the basic concepts of carrier, modulation and bandwidth and the tradeoffs that come with them. Cool

[@HB9BLA]

Cool! Glad you were able to name the most important topics.

[@sunhillman63]

Andreas, many thanks. Good explanation! I remember my lectures @university keep contnuing,

[@HB9BLA]

You are welcome! Indeed, 30 years ago these things were taught at universities more than today :-(

[@David_11111]

yay i need to watch this again :)

[@HB9BLA]

A lot of topics in a short time, I know…

[@mcconkeyb]

Excellent introduction to communication theory! Looking forward to the more detailed presentation of this material. It reminds me of the engineering university courses that I took, 30 years ago. :-)

[@HB9BLA]

Unfortunately, at universities, we learned more about this topic 30 years ago than now. That is one reason for this channel.

[@mcconkeyb]

@@HB9BLA I agree! In the last 10 years, you can get an electrical engineering degree without taking a course in thermodynamics! Just because an EE doesn't use TD daily, doesn't mean that they don't need to understand it. Keep up the good work.

[@donbeckham]

Thanks for the videos... You sound tired or sick. If so, I hope you feel better soon.

[@HB9BLA]

No problem here. This video Is cross-posted from my main channel

[@jmr]

This made me think about number stations and the secret messages on BBC.

[@HB9BLA]

I do not know anything about these stations.

[@jmr]

@@HB9BLA 🤣 I think your teasing.

[@PhG1961]

Great content !

[@HB9BLA]

Thank you!

[@markusmeier761]

As always an excellent video. One question: after 4:00 you you mention that "the signal has no distinct peaks" (FM modulation). I believe that periodic signals always have a discrete spectrum, and suspect that the discrete lines are not visible due to the bandwidth of the FFT analysis (windowing) (see the broad peaks in the AM modulation example). Maybe you can see the discrete spectrum better if you set the modulation frequency higher. - In addition, with the FM spectrum you probably see another artefact: the spectrum does not always have the same shape, sometimes it is 'flat top', sometimes it is skewed to the right or left. Does the sampling length play a role here? Thank you for your vontinued effort!

[@HB9BLA]

You are right. If you modulate it with one frequency it also has peaks and my RBW was probably too wide.

[@ihabsglei]

At the beginning of the video you refer to bandwidth as a quantity with the physical dimension of hertz. Later you talk about bits per second. How does that fit together?

[@HB9BLA]

Shannon's law (C = B log2< (1 + S/N)) shows the relation between bandwidth B and the highest attainable error-free data speed in bps C.

[@cx3268]

OK for RF transmission, are you going to do a video on IR transmission?

[@HB9BLA]

Not on this channel. Maybe on my main channel

[@mbr8981]

Gibt es eigentlich gerichtete Antennen für LoRa und ergibt sich ein Vorteil?

[@HB9BLA]

Man kann Richtantennen für alle Frequenzen bauen. Bei LoRa nützen sie nicht so viel. Ich habe auf meinem Hauptkanal zwei Videos über die Ausbreitung von LoRa gemacht.

[@mbr8981]

@@HB9BLA kzbin.info/www/bejne/bJS5iqZ-eLF-p5o das hab ich gesehen was wäre das Andere?

[@mbr8981]

kzbin.info/www/bejne/pGqUYq2Kg66hbqc

[@HB9BLA]

Such nach „world record“ und nach „wardriving „

[@mbr8981]

@@HB9BLA Ach stimmt da war mal was