top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

After how many 10ms frames the channel can be estimated? What would be the approach ?

+2 votes
357 views

Estimate only part of channel matrix or whole channel matrix?

posted Jun 17, 2014 by Balwinder

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

The channel estimation algorithms are running at the receiver part, which is not standardized. This means, it is up to implementation and it’s vendor specific.

However the typical approach is that channel estimation is done based on subframe / TTI basis (which is 1ms). This is because a single allocation for a UE is done in this timeframe.

Speaking of the estimation itself, there are different approaches as well. You may e.g. do a joint 2D estimation or separated Time and Frequency estimations for a UE allocated PRBs only. Another approach is that the estimation is done on larger portion of PRBs than the actual allocation, because it provides the UE with more points (based on pilots / RSs) for the interpolation, which may be in that case with better resolution.

answer Jun 18, 2014 by Manish Tiwari
Similar Questions
+1 vote

RACH procedure can be done by any number of UEs in a cell. But I want to know how many maximum RACH preambles can be decoded successfully at eNodeB and what factors derive this ?

0 votes

Many values for the MCS index have been defined in the specification. Value ranges from 0 to 31.
Each MCS index values corresponds to different combination of "number of spatial streams + modulation type + Coding rate" .
In case of PDSCH resource allocation, eNodeB considers feedback from the UE but in case of PMCH where data is transmitted only at downlink. How a particular MCS index would be chosen for multimedia multicast broadcast data transmission ?
If I am correct, selection of MCS index is done at MCE and sends to eNodeBs/cells belong to the same MBSFN area ?
In this case when MCS index is selected by MCE, how MCE take decision on this factor ?
I am also looking for set of MCS index values which can be used for MBMS transmission ?

...