@@5glearning772 Thank you very much for your reply! I guess other people will realize this small typo when they watch it, or they might see our conversations here. Thanks anyway for your quick response!
@@5glearning772 Your video was really helpful for my understanding of beamforming technology. I've watched all of them and thanks for your efforts on publishing these great videos.
Beam-forming for transmission is certainly possible and used in many applications (mobile communications, radar, radioastronomy, to name a few). The reason why only reception beam-forming is discussed in the videos is lack of time to fully develop this interesting subject.
Hi, first of all thank you for your excellent lecture. My doubt is how do we suppress the secondary lobes? Do we even need to suppress these secondary lobes at all? Do we use the antenna weights q1,q2 to suppress the side lobes too?
Thanks for your comment. Unfortunately, we cannot suppress the secondary lobes completely with current technology. It is possible to reduce its influence by proper separation between antenna-array elements and parasitic elements, but they still be present. In practical antennas at centimeter wavelengths (as used currently in 5G), secondary lobe gains are usually 10 dB or more below the main lobe. Therefore, even if they may produce some interference on adjacent cells (for example) their influence is small. In millimeter waves, it is feasible to design antenna arrays with e.g. 16 elements (or more). In that case, secondary lobes have very low gain compared to the main lobe and their impact may be considered negligible. Proper selection of antenna weights is mainly used to steer the beam to the target. I hope that these comments may help.
Thanks very much for your feedback! The array may support more than one SSB while using analog beamforming, because the array may point to a certain direction, transmit the SSB burst, then point to an alternative direction and set another SSB burst, and so on in order to sweep the entire sector or cell. The analog beamforming limitations are mainly in connected mode.
@@5glearning772 Thank you so much :) !!in case of two BWPs with 2 different SSBs are the two SSBs transmitted at the same time or there's one Main SSB that is transmitted? and can we have different UEs connected to different BWPs at the same time?
Beamforming very detailed explained. Especially now I understand the gain graphs, I believe the first half of video is relevant for me.
There's a typo at around 4:00. The wavelength of 1 GHz is 30 cm, not 10 cm.
Sorry for the mistake, I will correct it. Thanks for your comment.
Unfortunately, UA-cam no longer allows to add annotations to existing videos, so I cannot add a correction :-(
@@5glearning772 Thank you very much for your reply! I guess other people will realize this small typo when they watch it, or they might see our conversations here. Thanks anyway for your quick response!
@@5glearning772 Your video was really helpful for my understanding of beamforming technology. I've watched all of them and thanks for your efforts on publishing these great videos.
@@guoyixu5793 thank you very much! Glad to know that the videos were interesting.
Very well explained. Thank you!
Now I have better understanding
Stop changing my utude g I want my. Old you tub back
Thank you. Through your video, I understood beamforming for reception signal. How about beamforming for tranmission signal?
Beam-forming for transmission is certainly possible and used in many applications (mobile communications, radar, radioastronomy, to name a few).
The reason why only reception beam-forming is discussed in the videos is lack of time to fully develop this interesting subject.
Hi, first of all thank you for your excellent lecture.
My doubt is how do we suppress the secondary lobes? Do we even need to suppress these secondary lobes at all?
Do we use the antenna weights q1,q2 to suppress the side lobes too?
Thanks for your comment.
Unfortunately, we cannot suppress the secondary lobes completely with current technology. It is possible to reduce its influence by proper separation between antenna-array elements and parasitic elements, but they still be present.
In practical antennas at centimeter wavelengths (as used currently in 5G), secondary lobe gains are usually 10 dB or more below the main lobe. Therefore, even if they may produce some interference on adjacent cells (for example) their influence is small.
In millimeter waves, it is feasible to design antenna arrays with e.g. 16 elements (or more). In that case, secondary lobes have very low gain compared to the main lobe and their impact may be considered negligible.
Proper selection of antenna weights is mainly used to steer the beam to the target.
I hope that these comments may help.
@@5glearning772 thank you for the reply, I get your point now.
Thank you so much for the video!! In case of analog BF does this mean there is only one SSB where lmax=1 since analog can have only one bf at a time
Thanks very much for your feedback!
The array may support more than one SSB while using analog beamforming, because the array may point to a certain direction, transmit the SSB burst, then point to an alternative direction and set another SSB burst, and so on in order to sweep the entire sector or cell.
The analog beamforming limitations are mainly in connected mode.
@@5glearning772 Thank you so much :) !!in case of two BWPs with 2 different SSBs are the two SSBs transmitted at the same time or there's one Main SSB that is transmitted? and can we have different UEs connected to different BWPs at the same time?
So nice, keep going
Thank you
Great
Thank you.
thank you
Welcome
tks very much :))
Welcome!
can you share ppt ?
Sorry, only the videos are available in this moment.
I think u need to learn more on speaking Proficiency than telling us beamforming. Please learn more about 5G cogitative beamforming.