3GPPFDD_PCPCHSprd
Description: Uplink PCPCH spreading and scrambling
Library: 3GPPFDD, PhyCH Multiplexers & Coders
Class: SDF3GPPFDD_PCPCHSprd
Derived From: 3GPPFDD_ULPhyCHBase
Parameters
Name |
Description |
Default |
Unit |
Type |
Range |
|---|---|---|---|---|---|
SpecVersion |
version of specifications: Version_03_00, Version_12_00, Version_03_02 |
Version_12_00 |
|
enum |
|
ScrambleCode |
index of scramble code |
8192 |
|
int |
[0:512] for downlink; |
Scramble |
scramble code type: LONG, SHORT |
LONG |
|
enum |
|
Pin Inputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
1 |
CtrlIn |
DPCCH part |
int |
2 |
GainD |
gain factor of DPDCH |
real |
3 |
GainC |
gain factor of DPCCH |
real |
4 |
SltFin |
DPDCH slot format |
int |
5 |
Data |
data |
int |
Pin Outputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
6 |
out |
data out |
complex |
Notes/Equations
- This model is used to spread and scramble message part of PCPCH. The following figure illustrates the process.
Spreading and Scrambling of PCPCH Message Part
- For control and data parts:
- The control part is always spread by code cc=Cch,256,0.
- The data part is spread by code cd =Cch,SF,k where SF is the spreading factor of the data part and k=SF/4. The data part may use the code from spreading factor 4 to 256.
- Long or short scrambling codes can be used to scramble the CPCH message part. There are 64 uplink scrambling codes defined per cell and 32768 different PCPCH scrambling codes defined in the system. The nth PCPCH message part scrambling code, denoted Sc-msg,,n, where n = 8192,8193, ... , 40959 is based on the scrambling sequence as defined in [2].
References
- 3GPP Technical Specification TS 25.211 V3.10.0, Physical channels and mapping of transport channels onto physical channels (FDD), March 2003, Release 1999.
http://www.3gpp.org/ftp/Specs/2002-03/R1999/25_series/25211-3a0.zip
- 3GPP Technical Specification TS 25.213 V3.7.0, Spreading and modulation (FDD), March 2003, Release 1999.
http://www.3gpp.org/ftp/Specs/2002-03/R1999/25_series/25213-370.zip