Note: This page has been translated by MathWorks. Click here to see

To view all translated materials including this page, select Country from the country navigator on the bottom of this page.

To view all translated materials including this page, select Country from the country navigator on the bottom of this page.

PDCCH search space candidates

`ind = ltePDCCHSpace(enb,ue)`

`ind = ltePDCCHSpace(enb,ue,opts)`

returns
the (0,2,4,6)-by-2 matrix `ind`

= ltePDCCHSpace(`enb`

,`ue`

)`ind`

of search space
PDCCH candidate indices given the structures `enb`

and `ue`

.
Depending on input parameters, each search space contains (0,2,4,
or 6) PDCCH candidate locations defined by the rows of `ind`

.
Each two-element row contains the inclusive `[begin,end]`

indices
of a single PDCCH candidate location. By default, the one-based indices
define the PDCCH locations in the block of all multiplexed PDCCH data
bits to be transmitted in that subframe.

The control region of a downlink subframe comprises the multiplexing of all PDCCHs bits into a single block of data which is then processed and interleaved before PDCCH resource mapping. A UE has to blindly decode individual PDCCH directed at it. This task is simplified by subdividing the whole region into common and UE-specific search spaces which the UE should monitor. Each space comprises 2, 4, or 6 PDCCH candidates whose data length depends on its PDCCH format. Each PDCCH must be transmitted on 1, 2, 4, or 8 control channel elements (CCE) (1 CCE = 72 bits).

The returned search space is of the UE-specific type unless
the `RNTI`

field is missing from the structure `ue`

when
a common search space is returned. The search space always contains
2, 4, or 6 candidates; therefore, `ind`

has 2,
4, or 6 rows, unless the parameter combinations are not valid, in
which case the `ind`

output returned is empty.
For more information, see TS 36.213 [1], Section 9.1.1. The candidates in a space do not
need to be unique, especially for smaller bandwidths.

[1] 3GPP TS 36.213. “Physical layer procedures.”
*3rd Generation Partnership Project; Technical Specification Group Radio
Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA)*.
URL: http://www.3gpp.org.

`ltePDCCH`

| `ltePDCCHDecode`

| `ltePDCCHDeinterleave`

| `ltePDCCHIndices`

| `ltePDCCHInfo`

| `ltePDCCHInterleave`

| `ltePDCCHPRBS`

| `ltePDCCHSearch`