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

Parameters

Name

Description

Default

Unit

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 Inputs

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

Notes/Equations
  1. 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.
  2. The schematic for this subnetwork is shown in the following figure.

  3. 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.
  4. CollectBits is used to specify whether or not to save the reference and decoded bits.
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