# lteCellRS

Cell-specific reference signal

## Description

sym = lteCellRS(enb) returns cell-specific reference signal symbols for cell-wide settings in the enb structure. sym is a complex-valued column vector containing cell-specific reference signal symbols. Unlike other physical channels and signals, the symbols for multiple antennas are concatenated into a single column rather than returned in a matrix with a column for each antenna. The reason for this behavior is that the number of symbols varies across the antenna ports.

example

sym = lteCellRS(enb,ports) returns cell-specific reference signal symbols for antenna ports specified in the vector, ports (0,1,2,3), and cell-wide settings structure, enb. In this case, CellRefP is ignored if present in enb and ports is used instead.

## Examples

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This example shows different numbers of cell-specific reference signal symbols transmitted at antenna port 0 and 2.

Initialize cell wide parameter structure, enb, to RMC R.6

enb = lteRMCDL('R.6');

Observe the number of cell-specific reference symbols on port 0

cellRefPort0 = length(lteCellRS(enb,0))
cellRefPort0 = 200

Observe the number of cell-specific reference symbols on port 2

cellRefPort2 = length(lteCellRS(enb,2))
cellRefPort2 = 100

## Input Arguments

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eNodeB cell-wide settings, specified as a structure containing these parameter fields.

Parameter FieldRequired or OptionalValuesDescription
NDLRBRequired

Scalar integer from 6 to 110

Number of downlink resource blocks (${N}_{\text{RB}}^{\text{DL}}$)

NCellIDRequired

Integer from 0 to 503

Physical layer cell identity

NSubframeRequired

0 (default), nonnegative scalar integer

Subframe number

CellRefPRequired

1, 2, 4

Number of cell-specific reference signal (CRS) antenna ports

CyclicPrefixOptional

'Normal' (default), 'Extended'

Cyclic prefix length

DuplexModeOptional

'FDD' (default), 'TDD'

Duplexing mode, specified as either:

• 'FDD' for Frequency Division Duplex

• 'TDD' for Time Division Duplex

The following parameters are dependent upon the condition that DuplexMode is set to 'TDD'.

TDDConfigOptional

0, 1 (default), 2, 3, 4, 5, 6

SSCOptional

0 (default), 1, 2, 3, 4, 5, 6, 7, 8, 9

Special subframe configuration (SSC)

Antenna ports, specified as a numeric vector whose elements must be (0, 1, 2, 3).

## Output Arguments

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Cell-specific reference signal symbols, returned as a complex-valued numeric column vector. This argument contains cell-specific reference signal symbols for the specified cell-wide settings, enb, and optional number of antenna ports, ports.

Data Types: double
Complex Number Support: Yes

## Version History

Introduced in R2014a