3GPPFDD_UL_RACH
Description: 3GPP uplink RACH
Library: 3GPPFDD, User Equipment
Class: SDF3GPPFDD_UL_RACH
Derived From: 3GPPFDD_ULRefCHBase
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 |
0 |
|
int |
[0:512] for downlink; |
RACHDataPattern |
RACH source data pattern: RACH_random, RACH_PN9, RACH_PN15, RACH_bits_repeat, RACH_user_file |
RACH_random |
|
enum |
|
RACHRepBitValue |
RACH repeating data value |
0xff |
|
int |
[0:255] |
RACHUserFileName |
RACH user-defined data file name |
datafile.txt |
|
filename |
|
RACHBlockSize |
RACH transport block size: RACH_168, RACH_360 |
RACH_168 |
|
enum |
|
PrmblSgntr |
Preamble Signature |
0 |
|
int |
[0:15] |
DPDCHGain |
DPDCH gain |
1.0 |
|
real |
(∞, ∞) |
DPCCHGain |
DPCCH gain |
1.0 |
|
real |
(∞, ∞) |
Pin Outputs
Pin |
Name |
Description |
Signal Type |
---|---|---|---|
1 |
out |
signal in chips |
complex |
2 |
RACH |
RACH data out |
int |
Notes/Equations
- This subnetwork model provides the RACH signal source. The actual values of transport channel characteristics are obtained from [2]. The schematic for this subnetwork is shown in the following figure.
3GPPFDD_UL_RACH Schematic
- The transport channel parameters are:
Transport block size: NRACH =168 or 360 bits
CRC: 16 bits
Coding: CC, coding rate = 1/2
TTI: 20 ms
Minimum spreading factor: 32 - The transport channel coding is illustrated in the following figure.
- The DPDCH bit rates are 30 and 60 kbps for transport block size of 168 and 360 bits, respectively. The repeat rate is 56.25% after rate matching.
UL RACH Channel Coding
References
- 3GPP Technical Specification TS 25.944 V3.0.0 "Multiplexing and channel coding (FDD)" Release 1999.
- 3GPP Technical Specification TS 25.944 V3.3.0 "Multiplexing and channel coding (FDD)" Release 1999.