3GPPFDD RF EVM

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3GPPFDD_RF_EVM

Description: 3GPP EVM measurements
Library: 3GPPFDD, Measurement
Class: TSDF3GPPFDD_RF_EVM

Name	Description	Default	Unit	Type	Range
SpecVersion	version of specifications: Version_03_00, Version_12_00, Version_03_02	Version_12_00		enum
RLoad	input resistance	DefaultROut	Ohm	real	(0, ∞)
RTemp	temperature of resistor, in celsius	DefaultRTemp		real	[-273.15, ∞)
ExcessBW	excess bandwidth of raised cosine filters	0.22		real	(0.0:1.0)
FilterLength	length of raised cosine filters in number of symbols	16		int	[1:inf]
SamplesPerChip	samples per chip	8		int	[1:256]
LinkDir	link direction: Downlink, Uplink	Uplink		enum
ScrambleCode	index of scramble code	0		int	[0:511] for downlink; [0:16777215] for uplink
ULScrambleType	uplink scramble code type: LONG, SHORT	LONG		enum
ScrambleOffset	scramble offset in downlink channels	0		int	[0:15]
DLScrambleType	downlink scramble code type: Normal, RightAlternate, LeftAlternate	Normal		enum
SpreadCode	index of spread code	0		int	[0:255] for uplink DPCCH; [0:SF-1] for downlink; SF is set by SlotFormat
SlotFormat	slot format	0		int	[0:5] for uplink DPCCH; [0:16 ] for downlink DPCH
StartSlot	number of slot to be ignored	0		int	[0, ∞)
SlotNum	number of slots measured	1		int	[1:15]
SCH	switch for SCH: OFF, ON	ON		enum
CPICH	switch for CPICH: OFF, ON	OFF		enum
DUT_DelayBound	Search length	.00001 sec	sec	real	(0:(400.0/3840000))
EVMValue	EVM value expression options: EVM_Ratio, EVM_Percent	EVM_Percent		enum
Correct_IQ_Offset	switch for IQ offset correction: NO, YES	YES		enum

Pin	Name	Description	Signal Type
1	RFin	input RF signal	timed
2	RefIn	reference signal for EVM	complex

This subnetwork model is used to measure EVM for 3GPP FDD transmitter.
EVM is measured by comparing the reference signals with the signals to be tested. Root-raised cosine filtering is performed before each test and reference signal.
The schematic for this subnetwork is shown in the following figure.

Schematic of 3GPPFDD_RF_EVM
Refer to 3GPPFDD_EVM_NonSyn for more information.
Use of this model is demonstrated in base station and user equipment transmitter examples: File > Example Project > WCDMA3G > WCDMA3G_BS_Tx_prj > BS_Tx_EVM.dsn and WCDMA3G_UE_Tx_prj > UE_Tx_EVM.dsn. Simulation results are provided in Data Display windows for these designs.