Hello Sir, Very much informative and simple session of a complex topic. Now my antenna and massive MIMO concepts are very clear with no more confusions. Thank you
Sir I have a doubt , you mentioned at time:27:23 ,if you have two set of frequencies one array can use one frequency and other can use the next frequency ,But 4x4 MIMO with respect to UE is on the same frequency right ?One carrier is configured with 4 layers right ? little confused here..
Hello Sir, Normally, I have a common beam that is associated with the physical control and reference channels, that is, it will serve the user's data. Then I have a figure with multiple beams, are these multiple beams simultaneous? Is their idea to cover the area around the cell? Because apparently, they're not targeted in a way for that to happen. We'd have to think of a 3D cell because eventually I'll have buildings around me, and I'll have to point beams up. For each such beam, for example, one beam is pointed downwards, so it will cover a closer area, and so on? Also, when directing the beams upwards to cover buildings around me. When designing the coverage cell for link budgeting purposes, who is my cell, and what is my station covering? Do I need to consider these multiple beams? If I take a beam by beam and let's assume that the beam is the cell, would I have to do a link budget calculation for each of these beams to assess the actual coverage? For each beam, I have a different gain, so I have a different analysis? Based on calculations found by materials available on the internet, I verified that only a fixed gain value is considered in the link budget calculation. Even in the multibeam situation, there is a physical limitation of the antenna array in the sense of maximum gain capability in a certain desired direction. I must modify phases and eventually amplitude at the input of each antenna element to obtain the desired pointing. By imagining that I am feeding all the antenna elements with the same phase and amplitude, I will have a beam pointed, probably, in the central direction. It is in this central direction that I will have the greatest possible gain if I consider all the elements. If I try to take all the elements and point in another direction, other than this central one, I'll be able to point, but I understand that I won't have that maximum gain. From the figure below, I can see that if I look at it beam by beam, the gain will vary. I will work with maximum gain, but that is not the same for each antenna element for this link budget analysis. Correct? When using a maximum gain value in the link budget calculation, such as 23.2 dBi, does it refer to the maximum of the maximums? Best Regards!
Really your way of KT is very simple and easy to grasp...love going through your recorded session.. I like to interact in some live session of yours.... Please tell me how can i do so
Hi sir. It was a nice session. Thank u. One doubt in a 64T64R antenna with 64 antenna elements, as u say it is possible to configure sub arrays dynamically, this means each of these elements have its own RF Chain. Won't this be challenging? Basically with dual polarization would this mean 128 ports?
Hello Sir,
Very much informative and simple session of a complex topic. Now my antenna and massive MIMO concepts are very clear with no more confusions. Thank you
Thanks
Very nicely explained, especially the massive mimo Part and null steering.
Thanks
Seached a lot about this topic and found multiple video and lot of confusion..but now concept is clear with this video..thanks to you !!
Very nice and simple explanation sir. It is easy to understand by everyone. Thank you so much!
Thanks Santosh
Appreciate your effort to deliver conceptual sessions in a simple manner.
Thanks
Thanks for your interessting video. Perhaps you can add the sources from the beginning to the description box.
Yes thanks. Will do
Very good explanation
Keep watching
Thanks Sir.Kindly upload a session about details of 5G physical channel like DMRS,CSI-RS,TRS & CORRSET
if possible
Sure Saurav
Thank you sir,..I have one doubt...if MU-MIMO uses different frequencies or same frequency? & 2nd if massive MIMO is a kind of MU MIMO ?
Sir I have a doubt , you mentioned at time:27:23 ,if you have two set of frequencies one array can use one frequency and other can use the next frequency ,But 4x4 MIMO with respect to UE is on the same frequency right ?One carrier is configured with 4 layers right ? little confused here..
Yes. You are right. We will use spatial multiplexing in case of MIMO and Carrier Aggregation or dual connectivity in case we have multiple carriers.
Hello Sir,
Normally, I have a common beam that is associated with the physical control and reference channels, that is, it will serve the user's data. Then I have a figure with multiple beams, are these multiple beams simultaneous? Is their idea to cover the area around the cell? Because apparently, they're not targeted in a way for that to happen. We'd have to think of a 3D cell because eventually I'll have buildings around me, and I'll have to point beams up. For each such beam, for example, one beam is pointed downwards, so it will cover a closer area, and so on? Also, when directing the beams upwards to cover buildings around me. When designing the coverage cell for link budgeting purposes, who is my cell, and what is my station covering? Do I need to consider these multiple beams? If I take a beam by beam and let's assume that the beam is the cell, would I have to do a link budget calculation for each of these beams to assess the actual coverage?
For each beam, I have a different gain, so I have a different analysis? Based on calculations found by materials available on the internet, I verified that only a fixed gain value is considered in the link budget calculation. Even in the multibeam situation, there is a physical limitation of the antenna array in the sense of maximum gain capability in a certain desired direction. I must modify phases and eventually amplitude at the input of each antenna element to obtain the desired pointing.
By imagining that I am feeding all the antenna elements with the same phase and amplitude, I will have a beam pointed, probably, in the central direction. It is in this central direction that I will have the greatest possible gain if I consider all the elements. If I try to take all the elements and point in another direction, other than this central one, I'll be able to point, but I understand that I won't have that maximum gain.
From the figure below, I can see that if I look at it beam by beam, the gain will vary. I will work with maximum gain, but that is not the same for each antenna element for this link budget analysis. Correct?
When using a maximum gain value in the link budget calculation, such as 23.2 dBi, does it refer to the maximum of the maximums?
Best Regards!
Really your way of KT is very simple and easy to grasp...love going through your recorded session.. I like to interact in some live session of yours.... Please tell me how can i do so
Thanks. Will announce my open Session in future
Hi sir. It was a nice session. Thank u. One doubt in a 64T64R antenna with 64 antenna elements, as u say it is possible to configure sub arrays dynamically, this means each of these elements have its own RF Chain. Won't this be challenging? Basically with dual polarization would this mean 128 ports?
I think yes.
Can you explain in practical information in about massive MIMO, thanks
May like to be specific.
How many Types of beams are there in 32t32r
May pl elaborate your question