Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
O
OpenXG UE
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Issues
0
Issues
0
List
Boards
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Analytics
Analytics
CI / CD
Repository
Value Stream
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
Michael Black
OpenXG UE
Commits
d5a9b78c
Commit
d5a9b78c
authored
Feb 08, 2021
by
Thomas Schlichter
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
gNB: Add PRACH reception support for 10 to 30 MHz (30 kHz SCS)
parent
dad1193a
Changes
1
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
96 additions
and
0 deletions
+96
-0
openair1/PHY/NR_TRANSPORT/nr_prach.c
openair1/PHY/NR_TRANSPORT/nr_prach.c
+96
-0
No files found.
openair1/PHY/NR_TRANSPORT/nr_prach.c
View file @
d5a9b78c
...
...
@@ -302,6 +302,102 @@ void rx_nr_prach_ru(RU_t *ru,
// do DFT
if
(
mu
==
1
)
{
switch
(
fp
->
samples_per_subframe
)
{
case
15360
:
// 10, 15 MHz @ 15.36 Ms/s
prach2
=
prach
[
aa
]
+
(
1
*
Ncp
);
// Ncp is for 30.72 Ms/s, so divide by 2 to bring to 15.36 Ms/s and multiply by 2 for I/Q
if
(
prach_sequence_length
==
0
)
{
if
(
prachFormat
==
0
||
prachFormat
==
1
||
prachFormat
==
2
)
{
dftlen
=
12288
;
dft
(
DFT_12288
,
prach2
,
rxsigF
[
aa
],
1
);
}
if
(
prachFormat
==
1
||
prachFormat
==
2
)
{
dft
(
DFT_12288
,
prach2
+
24576
,
rxsigF
[
aa
]
+
24576
,
1
);
reps
++
;
}
if
(
prachFormat
==
2
)
{
dft
(
DFT_12288
,
prach2
+
(
24576
*
2
),
rxsigF
[
aa
]
+
(
24576
*
2
),
1
);
dft
(
DFT_12288
,
prach2
+
(
24576
*
3
),
rxsigF
[
aa
]
+
(
24576
*
3
),
1
);
reps
+=
2
;
}
if
(
prachFormat
==
3
)
{
dftlen
=
3072
;
for
(
int
i
=
0
;
i
<
4
;
i
++
)
dft
(
DFT_3072
,
prach2
+
(
i
*
3072
*
2
),
rxsigF
[
aa
]
+
(
i
*
3072
*
2
),
1
);
reps
=
4
;
}
}
else
{
// 839 sequence
if
(
prachStartSymbol
==
0
)
prach2
+=
16
;
// 8 samples @ 15.36 Ms/s in first symbol of each half subframe (15/30 kHz only)
dftlen
=
512
;
dft
(
DFT_512
,
prach2
,
rxsigF
[
aa
],
1
);
if
(
prachFormat
!=
9
/*C0*/
)
{
dft
(
DFT_512
,
prach2
+
1024
,
rxsigF
[
aa
]
+
1024
,
1
);
reps
++
;
}
if
(
prachFormat
==
5
/*A2*/
||
prachFormat
==
6
/*A3*/
||
prachFormat
==
8
/*B4*/
||
prachFormat
==
10
/*C2*/
)
{
dft
(
DFT_512
,
prach2
+
1024
*
2
,
rxsigF
[
aa
]
+
1024
*
2
,
1
);
dft
(
DFT_512
,
prach2
+
1024
*
3
,
rxsigF
[
aa
]
+
1024
*
3
,
1
);
reps
+=
2
;
}
if
(
prachFormat
==
6
/*A3*/
||
prachFormat
==
8
/*B4*/
)
{
dft
(
DFT_512
,
prach2
+
1024
*
4
,
rxsigF
[
aa
]
+
1024
*
4
,
1
);
dft
(
DFT_512
,
prach2
+
1024
*
5
,
rxsigF
[
aa
]
+
1024
*
5
,
1
);
reps
+=
2
;
}
if
(
prachFormat
==
8
/*B4*/
)
{
for
(
int
i
=
6
;
i
<
12
;
i
++
)
dft
(
DFT_512
,
prach2
+
(
1024
*
i
),
rxsigF
[
aa
]
+
(
1024
*
i
),
1
);
reps
+=
6
;
}
}
break
;
case
30720
:
// 20, 25, 30 MHz @ 30.72 Ms/s
prach2
=
prach
[
aa
]
+
(
2
*
Ncp
);
// Ncp is for 30.72 Ms/s, so just multiply by 2 for I/Q
if
(
prach_sequence_length
==
0
)
{
if
(
prachFormat
==
0
||
prachFormat
==
1
||
prachFormat
==
2
)
{
dftlen
=
24576
;
dft
(
DFT_24576
,
prach2
,
rxsigF
[
aa
],
1
);
}
if
(
prachFormat
==
1
||
prachFormat
==
2
)
{
dft
(
DFT_24576
,
prach2
+
49152
,
rxsigF
[
aa
]
+
49152
,
1
);
reps
++
;
}
if
(
prachFormat
==
2
)
{
dft
(
DFT_24576
,
prach2
+
(
49152
*
2
),
rxsigF
[
aa
]
+
(
49152
*
2
),
1
);
dft
(
DFT_24576
,
prach2
+
(
49152
*
3
),
rxsigF
[
aa
]
+
(
49152
*
3
),
1
);
reps
+=
2
;
}
if
(
prachFormat
==
3
)
{
dftlen
=
6144
;
for
(
int
i
=
0
;
i
<
4
;
i
++
)
dft
(
DFT_6144
,
prach2
+
(
i
*
6144
*
2
),
rxsigF
[
aa
]
+
(
i
*
6144
*
2
),
1
);
reps
=
4
;
}
}
else
{
// 839 sequence
if
(
prachStartSymbol
==
0
)
prach2
+=
32
;
// 16 samples @ 30.72 Ms/s in first symbol of each half subframe (15/30 kHz only)
dftlen
=
1024
;
dft
(
DFT_1024
,
prach2
,
rxsigF
[
aa
],
1
);
if
(
prachFormat
!=
9
/*C0*/
)
{
dft
(
DFT_1024
,
prach2
+
2048
,
rxsigF
[
aa
]
+
2048
,
1
);
reps
++
;
}
if
(
prachFormat
==
5
/*A2*/
||
prachFormat
==
6
/*A3*/
||
prachFormat
==
8
/*B4*/
||
prachFormat
==
10
/*C2*/
)
{
dft
(
DFT_1024
,
prach2
+
2048
*
2
,
rxsigF
[
aa
]
+
2048
*
2
,
1
);
dft
(
DFT_1024
,
prach2
+
2048
*
3
,
rxsigF
[
aa
]
+
2048
*
3
,
1
);
reps
+=
2
;
}
if
(
prachFormat
==
6
/*A3*/
||
prachFormat
==
8
/*B4*/
)
{
dft
(
DFT_1024
,
prach2
+
2048
*
4
,
rxsigF
[
aa
]
+
2048
*
4
,
1
);
dft
(
DFT_1024
,
prach2
+
2048
*
5
,
rxsigF
[
aa
]
+
2048
*
5
,
1
);
reps
+=
2
;
}
if
(
prachFormat
==
8
/*B4*/
)
{
for
(
int
i
=
6
;
i
<
12
;
i
++
)
dft
(
DFT_1024
,
prach2
+
(
2048
*
i
),
rxsigF
[
aa
]
+
(
2048
*
i
),
1
);
reps
+=
6
;
}
}
break
;
case
61440
:
// 40, 50, 60 MHz @ 61.44 Ms/s
prach2
=
prach
[
aa
]
+
(
4
*
Ncp
);
// Ncp is for 30.72 Ms/s, so multiply by 2 for I/Q, and 2 to bring to 61.44 Ms/s
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment