WCDMA3G_BS_FixedRateDemod
Description: Uplink demodulation for measurement channels
Library: 3GPPFDD 10-99, Base Station
Class: SDFWCDMA3G_BS_FixedRateDemod
Parameters
Name |
Description |
Default |
Symbol |
Unit |
Type |
Range |
|---|---|---|---|---|---|---|
DataType |
measurement channel type: DTCH_12_2_kbps, DTCH_64_kbps, DTCH_144_kbps, DTCH_384_kbps |
DTCH_12_2_kbps |
|
|
enum |
|
UL_DPCCHType |
uplink dedicated physical control channel type: DPCCH_15kbps_P6_TF2_F0_T2, DPCCH_15kbps_P8_TF0_F0_T2, DPCCH_15kbps_P5_TF2_F1_T2, DPCCH_15kbps_P7_TF0_F1_T2, DPCCH_15kbps_P6_TF0_F2_T2, DPCCH_15kbps_P5_TF2_F2_T1 |
DPCCH_15kbps_P6_TF2_F0_T2 |
|
|
enum |
† |
ScramblingCodeType |
type of scrambling code: Long_Scrambling_Code, Short_Scrambling_Code |
Long_Scrambling_Code |
|
|
enum |
|
ScramblingCodeIndex |
scrambling code index |
0 |
|
|
int |
[0:16777215] |
SampleRate |
number of samples per chip |
8 |
S |
|
int |
[1:32] |
PathNum |
number of paths |
1 |
L |
|
int |
[1:16] |
MaxDelay |
maximum path delay in terms of chips |
20 |
D |
|
int |
[1:1280] |
SearchDir |
search path direction based on current timing: Forward, Backward, Bidirection |
Backward |
|
|
enum |
|
EstMethod |
channel estimation method: Averaging, Interpolation, WMSA, NoEst |
Interpolation |
|
|
enum |
|
† where
TFn= number of transmit format indicator bits
Tn= number of transmit power control bits
Pn= number of pilot bits
Fn= number of feedback indicator bits
Pin Inputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
1 |
In |
input data |
complex |
2 |
DPDCHDataIn |
input bits for DPDCH data fields |
int |
Pin Outputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
3 |
Out |
output data |
real |
4 |
PhyCHBER |
output physical channel BER value |
real |
Notes/Equations
- This subnetwork model is used to demodulate the input complex symbol to calculate the physical channel BER (bit error rate) for the reference measurement channels 12.2/64/144/384 kbps[1] of the base station in uplink.
The schematic for this subnetwork is shown in the following figure. It includes the Rake receiver, spreading code and scrambling code generation, and BER measurement. This subnetwork model takes the input symbol from pin In in chips and reference DPDCH data from pin DPDCHDataIn in radio frame (15 slots), outputs the demodulation data in radio frames and the physical channel BER once every radio frame (15 slots).
WCDMA3G_BS_FixedRateDemod Schematic
References
- 3GPP Technical Specification TS 25.104 V3.2.0 "UTRA(BS) FDD: Radio transmission and Reception," March 2000.
- 3GPP Technical Specification TS 25.141 V3.0.0 "Base station conformance testing (FDD)," December 1999.