lteCellRS

Cell-specific reference signal

Syntax

sym = lteCellRS(enb)

sym = lteCellRS(enb,ports)

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.

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

Find Length of Cell-Specific Reference Signals

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

enb — eNodeB cell-wide settings

structure

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

Parameter Field	Required or Optional	Values	Description
NDLRB	Required	Scalar integer from 6 to 110	Number of downlink resource blocks ($$N_{\text{RB}}^{\text{DL}}$$)
NCellID	Required	Integer from 0 to 503	Physical layer cell identity
NSubframe	Required	0 (default), nonnegative scalar integer	Subframe number
CellRefP	Required	1, 2, 4	Number of cell-specific reference signal (CRS) antenna ports
CyclicPrefix	Optional	'Normal' (default), 'Extended'	Cyclic prefix length
DuplexMode	Optional	'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'.
TDDConfig	Optional	0, 1 (default), 2, 3, 4, 5, 6	Uplink–downlink configuration
SSC	Optional	0 (default), 1, 2, 3, 4, 5, 6, 7, 8, 9	Special subframe configuration (SSC)

ports — Antenna ports

0 (default) | 1 | 2 | 3 | numeric vector | optional

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

Output Arguments

sym — Cell-specific reference signal symbols

complex-valued numeric column vector

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