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Do LTE physical layer need to use a SVD decomposition in case 4×4 antena structure.

+2 votes
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Do LTE physical layer need to use a SVD decomposition in case 4×4 antena structure.
posted Jun 17, 2014 by Mohammad

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1 Answer

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Singular Value Decomposition (SVD) is one of the possible approaches for MIMO decoding (aka deprecoding).

Deprecoding takes place in the receiver chain which is not standardized and it’s up to vendor implementation. SVD may be used in LTE, but it’s neither not mandatory nor pointed in the specifications as an option.

answer Jun 18, 2014 by Puneet Batra
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+1 vote

Since eNodeB can have information about channel quality with finer granularity through selected
subband CQI, wouldn’t it make sense to have MCSs defined on a per‐RB (or a group of RB) basis rather
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0 votes

At the high level I understand LTE nodes and signalling but want to learn in depth. I read one statement saying " MIB information is scrambled with antenna specific mask". Now I want to understand if an eNodeB supports multiple antennas (saying two antennas) , known as MIMO, then in that case, does an eNodeB sends MIB information into two different frequency spaces ? MIB is transmitted into subframe #0 of each radio frame.
Now I have doubt when we say MIB is scrambled with antenna specific mask before broadcasting and only middle 6 RBs are used to braodcast MIB, then in case of MIMO where multiple antennas are being used to send MIBs. Shall MIB from both the antennas overlap due to same 6 RBs or the same 6 RBs can be used to broadcast MIBs from both the antennas ?

+3 votes

I am looking for physical layer functions. Precisely would also be fine. Need to be more exact in answer.
Thanks in advance.

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