3GPPFDD RF Downlink BER

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3GPPFDD_RF_Downlink_BER

Description: 3GPP downlink BER measurements
Library: 3GPPFDD, Measurement
Class: SDF3GPPFDD_RF_Downlink_BER

Name	Description	Default	Type	Range
FrameNum	frame number	4	int	[0, ∞)
RefCh	reference measurment channel: DL_REF_12_2, DL_REF_64, DL_REF_144, DL_REF_384	DL_REF_12_2	enum
CollectBits	collect bits?: NO, YES	YES	enum

Pin	Name	Description	Signal Type
1	DTCH	DTCH data	int
2	RefDTCH	synchronized reference DTCH	int
3	DTCH_CRC	DTCH CRC	int
4	DCCH	DCCH data	int
5	RefDCCH	synchronized reference DCCH	int
6	DCCH_CRC	DCCH CRC	int
7	DPCH	DPCH data	int
8	RefDPCH	synchronized reference DPCH	int

This subnetwork model measures 3GPP FDD downlink reference measurement channel bit error rate (BER) for DPCH, DTCH and DCCH, as well as block error rates (BLER) for DTCH and DCCH. BER is measured by comparing the decoded bits with the reference bits. BLER is measured based on the CRC results.
The schematic for this subnetwork is shown in the following figure.

3GPPFDD_RF_Downlink_BER Schematic
FrameNum specifies the number of 10 msec frames to be measured. The DPCH channel is measured based on a 10 msec frame; DTCH and DCCH are measured based on the transport block set size per each TTI. The frame number that is based on a 10 msec-frame is converted to the TTI number using the ceil function. For example, if the frame number is 11 and the TTI is 20 msec, the TTIs to be measured will be ceil(11 × 10 / 20) = 6.
Transport block set size for each reference measurement channel is pre-defined using equations.
CollectBits is used to specify whether or not to save the reference and decoded bits.