WCDMA3G UE FixedRateReceiver

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WCDMA3G_UE_FixedRateReceiver

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

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	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	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

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

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