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DM-RS vs SRS in 5G 

Uttama Shikshana
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[ Interview QnA ] DM-RS vs SRS | Why do we need SRS when DMRS is already present?
DM-RS - Demodulation Reference Signals
SRS - Sounding Reference Signals
Telecom Industry Interview questions
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Опубликовано:

 

10 сен 2024

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Комментарии : 16   
@request_scudling
@request_scudling 6 месяцев назад
DMRS Digital Modulation Reference Signal !!! i think Demodulated Reference Signal
@Uttama_Shikshana
@Uttama_Shikshana 6 месяцев назад
Yes. Thanks for feedback. While explaining in fast, I told like that. It is mentioned rightly in the description box and also at later stage of the video, it is told correctly.
@awais1553
@awais1553 10 месяцев назад
Good explanation, Can you pls briefly explain how SRS wideband and SRS narrow band works and what was the benefit / reason of switching between above 2
@nitsr6053
@nitsr6053 Год назад
Sir how is Fujitsu company for 5g physical layer
@Uttama_Shikshana
@Uttama_Shikshana Год назад
Sorry, I am not aware. Anybody knows ? Please comment. Thanks
@VipinKumar-dv7hy
@VipinKumar-dv7hy Год назад
Fujitsu is big giant in Japan telecom....very big company in telecom
@venkateshthalluri1026
@venkateshthalluri1026 Год назад
Hi Sir Can you tell why SRS is scheduled only on last 6 symbols is there any reason behind it ?? As you mentioned SRS will be used for MIMO i.e., SRS will be sent over 2ports and check channel for LI --> like these CSIRS also be transmitted over 2ports to check MIMO in DL ??
@Uttama_Shikshana
@Uttama_Shikshana Год назад
1st question is left for others to comment. 2nd question - Yes. You are right.
@VipinKumar-dv7hy
@VipinKumar-dv7hy Год назад
@@Uttama_Shikshana one question here if we have mumimo then can't we do 1T 4R anttena switching srs..as per above description it's shows that mumimo required 2 port srs that means 2 TX correct???
@awais1553
@awais1553 10 месяцев назад
SRS usually transmitted in Gap symbols
@pankajagrawal3925
@pankajagrawal3925 Год назад
Hey, Can you tell the reason why SRS send on last symbol and also why we need csi rs
@Uttama_Shikshana
@Uttama_Shikshana Год назад
If nobody answers in the near future then I will try to bring the answers. Thanks
@gummadiramyasree2683
@gummadiramyasree2683 10 месяцев назад
​@@Uttama_Shikshanaplease provide answer for this
@sandeepsunny8894
@sandeepsunny8894 5 месяцев назад
@@Uttama_Shikshana Because SRS is used for estimating channel in UL, and channel reciprocity is then used to apply those coefficients in DL. And in case of high mobility channel will change quickly. Sending SRS in last will make sure that there is minimal gap between time of channel estimation and applying it in DL.
@VipinKumar-dv7hy
@VipinKumar-dv7hy Год назад
It's not digital it's demodulation
@Uttama_Shikshana
@Uttama_Shikshana Год назад
Yes. Thanks 😊