3GPPFDD_UL_Rx_RefCH
Description: Uplink integrated reference measurement channel receiver
Library: 3GPPFDD, Base Station
Class: SDF3GPPFDD_UL_Rx_RefCH
Parameters
Name |
Description |
Default |
Unit |
Type |
Range |
|---|---|---|---|---|---|
SpecVersion |
version of specifications: Version_03_00, Version_12_00, Version_03_02 |
Version_12_00 |
|
enum |
|
RefCh |
reference measurement channel: UL_REF_12_2, UL_REF_64, UL_REF_144, UL_REF_384_10, UL_REF_384_20, UL_REF_768, UL_REF_2048 |
UL_REF_12_2 |
|
enum |
|
DPCCH_SltFmt |
DPCCH slot format |
0 |
|
int |
[0:5] |
ScrambleCode |
index of scramble code |
0 |
|
int |
[0:512] for uplink; |
ScrambleType |
scramble type: Long, Short |
Long |
|
enum |
|
SampleRate |
sample rate |
8 |
|
int |
[1:256] |
MaxDelaySample |
maximum delay boundary, in terms of samples |
1 |
|
int |
[0:2559] |
ChannelType |
select the channel type to be processed: CH_GAUSSIAN, CH_FADING |
CH_GAUSSIAN |
|
enum |
|
ChannelInfo |
fading channel information source: Known, Estimated |
Known |
|
enum |
|
ChannelInfoOffset |
offset between spread code and channel information in terms of sample |
0 |
|
int |
[0:MaxDelaySample] |
PathSearch |
path search frequency: EverySlot, Once |
Once |
|
enum |
|
SearchMethod |
path search method: Coherent, NonCoherent, Combined |
Coherent |
|
enum |
|
SearchSlotsNum |
number of slots for path search |
1 |
|
int |
[1:6] |
PathNum |
number of Rake fingers |
1 |
|
int |
[1:6] |
PathDelaySample |
delay for each finger, in terms of samples |
0 |
|
int array |
[0:MaxDelaySample]; |
Pin Inputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
1 |
inChip |
input data stream |
complex |
2 |
inRefDTCH |
reference DTCH |
int |
3 |
inRefDCCH |
reference DCCH |
int |
4 |
inRefDTCHCoder |
reference DTCH after channel coding |
int |
5 |
inRefDCCHCoder |
reference DCCH after channel coding |
int |
6 |
inRefDPDCH |
reference DCCH |
multiple int |
7 |
inChM |
channel information |
multiple complex |
Pin Outputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
8 |
DTCH |
DTCH data |
int |
9 |
RefDTCH |
synchronized reference DTCH |
int |
10 |
DTCH_CRC |
DTCH CRC |
int |
11 |
DCCH |
DCCH data |
int |
12 |
RefDCCH |
synchronized reference DCCH |
int |
13 |
DCCH_CRC |
DCCH CRC |
int |
14 |
DTCHCoder |
DTCH before channel decoding |
int |
15 |
RefDTCHCoder |
synchronized reference DTCH before channel decoding |
int |
16 |
DCCHCoder |
DCCH before channel decoding |
int |
17 |
RefDCCHCoder |
synchronized reference DCCH before channel decoding |
int |
18 |
DPDCH |
DPDCH data |
int |
19 |
RefDPDCH |
synchronized reference DPDCH |
int |
Notes/Equations
- This integrated receiver for UTRA/WCDMA 3GPP uplink decodes the uplink reference measurement channel defined in 3GPP specifications. The signal processing flow covers the full 3GPP physical layer. The process is symmetric but in reverse order as at the signal source side.
- The uplink Rake receiver is at the front of this receiver; refer to 3GPPFDD_UL_Rake for more information. The despread and demodulated bits obtained from the Rake receiver are fed to the transport channel processing models for rate de-matching, channel decoding, and so on.
- Note that the physical channel bit stream has been delayed 1 frame (15 slots or 10 msec). The delay for each of the two transport channels is equal to the TTI for the associated transport channel. Therefore, the reference outputs from the source are taken as inputs and are delayed to be aligned with the decoded bit stream. The delayed data will be discarded when measuring BER/FER.
- This design can be a template to set up integrated receivers for other multiplexed services.
- The TFCI is set as a constant to avoid propagating the TFCI decoding error to the final BER performance. A degradation of approximately 1 dB in BER performance occurs if the TFCI is input from the TFCI decoder. If the TFCI is variable, it is better to get the error-free TFCI from the signal source side.
- If the 3GPP signal is S(t), this signal may be delayed t1 by some filters (such as the Tx RC filters). So, the delayed signal is S(t-t1) and the signal from 0 to t1 is zero and the real 3GPP signal transmission starts from t1. When the delayed signals pass through a fading channel, the fading factor is applied to the overall signals starting from time 0. The offset t1 must be known if the receiver of the channel information is input from outside; this offset is expressed in terms of samples.
References
- Refer to References.