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WCDMA3G_UE_FixedRateReceiver


Description: Downlink receiver for measurement channels
Library: 3GPPFDD 10-99, User Equipment
Class: SDFWCDMA3G_UE_FixedRateReceiver

Parameters

Name

Description

Default

Type

Range

DataType

measurement channel type: DTCH_12_2_kbps, DTCH_64_kbps, DTCH_144_kbps, DTCH_384_kbps

DTCH_12_2_kbps

enum

 

ScramblingCodeIndex

scrambling code index

0

int

[0, 8191]

SampleRate

number of samples per chip

8

int

[1, 32]

PathNum

number of paths

1

int

[1, 16]

MaxDelay

maximum path delay in terms of chips

20

int

[0, 1280]

SearchDir

path searching direction based on current timing: Forward, Backward, Bidirection

Backward

enum

 

EstMethod

channel estimation method: Averaging, Interpolation, WMSA, NoEst

Interpolation

enum

 

SF1

spreading factor for user1: SF1_4, SF1_8, SF1_16, SF1_32, SF1_64, SF1_128, SF1_256, SF1_512

SF1_256

enum

 

SF2

spreading factor for user2: SF2_4, SF2_8, SF2_16, SF2_32, SF2_64, SF2_128, SF2_256, SF2_512

SF2_256

enum

 

SF3

spreading factor for user3: SF3_4, SF3_8, SF3_16, SF3_32, SF3_64, SF3_128, SF3_256, SF3_512

SF3_256

enum

 

SF4

spreading factor for user4: SF4_4, SF4_8, SF4_16, SF4_32, SF4_64, SF4_128, SF4_256, SF4_512

SF4_256

enum

 

Pin Inputs

Pin

Name

Description

Signal Type

1

In

input data

complex

2

TFMaxIn

Input TFMax

int

3

RefDataIn1

reference data bits from source1

int

4

RefDataIn2

reference data bits from source2

int

5

DPCHDataIn

input bits for DPCH data fields

int

Pin Outputs

Pin

Name

Description

Signal Type

6

DCCH_Out

output data for DCCH

int

7

DCCH_BER

output BER value for DCCH

real

8

DCCH_BLER

output BLER value for DCCH

real

9

DTCH_Out

output data for DTCH

int

10

DTCH_BER

output BER value for DTCH

real

11

DTCH_BLER

output BLER value for DTCH

real

12

PhyCHBER

output physical channel BER value

real

Notes/Equations
  1. This subnetwork is used to demodulate and decode the input complex symbol to calculate the physical channel BER (bit error rate), transport channel BER/BLER (block error rate) for DTCH (dedicated transport channel) and DCCH (dedicated control channel) for reference measurement channels 12.2/64/144/384 kbps [1] for the user equipment in a downlink.
    The schematic for this subnetwork is shown in the following figure. It includes the Rake receiver, spreading code and scrambling code generation, transport channel de-multiplexing, channel decoding, and BER measurements.
    This subnetwork takes the input symbol from In in chips, reference source data from RefDataSrc1/RefDataSrc2 in transport blocks, reference DPDCH data from DPDCHDataIn in radio frames, TFMax value from TFMaxIn in every 10msec. It outputs the physical channel BER once every radio frame (15 slots) and outputs DCCH_BER/DCCH_BLER and DTCH_BER/DTCH_BLER once every transport block according to the TTI (transmit time interval) of each transport channel.

    WCDMA3G_UE_FixedRateReceiver Schematic

References
  1. 3GPP Technical Specification TS 25.101 V3.2.0 "UE: Radio transmission and Reception (FDD)," March 2000.
  2. 3GPP Technical Specification TS 34.121 V3.0.1 "Radio transmission and reception (FDD)," March 2000.
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