lteNPSS

Generate NPSS symbols for subframe

Syntax

sym = lteNPSS(enb)

Description

sym = lteNPSS(enb) generates sym, the narrowband primary synchronization signal (NPSS) symbols in a subframe for cell-wide settings enb.

Examples

Generate NPSS Symbols

Initialize cell-wide settings by specifying a narrowband operation mode and subframe number.

enb.OperationMode = 'Standalone';    % Narrowband operation mode
enb.NSubframe = 5;                   % Subframe number

Generate the NPSS symbols.

sym = lteNPSS(enb);

Input Arguments

enb — Cell-wide settings

structure

Cell-wide settings, specified as a structure containing these fields.

Name	Required or Optional	Values	Description	Data Types
OperationMode	Optional	'Standalone' (default), 'Inband-SamePCI', 'Inband-DifferentPCI', 'Guardband'	NB-IoT operation mode, specified as one of these values: 'Standalone' – NB-IoT standalone operation within any 180-kHz band outside any LTE carrier bandwidth 'Inband-SamePCI' – NB-IoT in-band operation with the same physical layer cell identity (PCI) as an LTE carrier 'Inband-DifferentPCI' – NB-IoT in-band operation with a different PCI to an LTE carrier 'Guardband' – NB-IoT guard-band operation utilizing unused resource blocks within the guard-band of an LTE carrier	char, string
NSubframe	Optional	5 (default), integer	Subframe number. Because the NPSS is defined only for subframe 5, the function returns an empty array for any value of this field other than 5. This behavior enables resource grid indexing for any subframe number.	double
NCellID	Required when you specify OperationMode as 'Inband-SamePCI' or 'Inband-DifferentPCI'	Integer in the interval [0, 503]	PCI	double
CellRefP	Required when you specify OperationMode as 'Inband-SamePCI' or 'Inband-DifferentPCI'	1, 2, 4	Number of cell-specific antenna ports	double

Note

To exclude cell reference signal (RS) locations, specify the NCellID and CellRefP fields. If you do not specify the NCellID and CellRefP fields, the function assumes that the cell RS is absent and generates NPSS values for all cell RS locations.

Data Types: struct

Output Arguments

sym — NPSS symbols for a subframe

complex-valued column vector | empty array

NPSS symbols for a subframe, returned as a complex-valued column vector. If you specify the NSubframe field of the enb input as any value other than 5, then the function returns this output as an empty array.

Data Types: double

Version History

Introduced in R2019a