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canghaiwuhen
OpenXG-RAN
Commits
12f4c55f
Commit
12f4c55f
authored
May 24, 2018
by
Guy De Souza
Browse files
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Plain Diff
PBCH RE mapping
parent
2ef63f24
Changes
1
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1 changed file
with
67 additions
and
33 deletions
+67
-33
openair1/PHY/NR_TRANSPORT/nr_pbch.c
openair1/PHY/NR_TRANSPORT/nr_pbch.c
+67
-33
No files found.
openair1/PHY/NR_TRANSPORT/nr_pbch.c
View file @
12f4c55f
...
@@ -37,6 +37,7 @@
...
@@ -37,6 +37,7 @@
//#define DEBUG_PBCH
//#define DEBUG_PBCH
//#define DEBUG_PBCH_ENCODING
//#define DEBUG_PBCH_ENCODING
//#define DEBUG_PBCH_DMRS
extern
short
nr_mod_table
[
NR_MOD_TABLE_SIZE_SHORT
];
extern
short
nr_mod_table
[
NR_MOD_TABLE_SIZE_SHORT
];
...
@@ -58,7 +59,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
...
@@ -58,7 +59,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
for
(
int
m
=
0
;
m
<
NR_PBCH_DMRS_LENGTH
;
m
++
)
{
for
(
int
m
=
0
;
m
<
NR_PBCH_DMRS_LENGTH
;
m
++
)
{
mod_dmrs
[
m
<<
1
]
=
nr_mod_table
[((
NR_MOD_TABLE_BPSK_OFFSET
+
((
gold_pbch_dmrs
[
m
>>
5
]
&
(
1
<<
(
m
&
0x1f
)))
>>
(
m
&
0x1f
)))
<<
1
)];
mod_dmrs
[
m
<<
1
]
=
nr_mod_table
[((
NR_MOD_TABLE_BPSK_OFFSET
+
((
gold_pbch_dmrs
[
m
>>
5
]
&
(
1
<<
(
m
&
0x1f
)))
>>
(
m
&
0x1f
)))
<<
1
)];
mod_dmrs
[(
m
<<
1
)
+
1
]
=
nr_mod_table
[((
NR_MOD_TABLE_BPSK_OFFSET
+
((
gold_pbch_dmrs
[
m
>>
5
]
&
(
1
<<
(
m
&
0x1f
)))
>>
(
m
&
0x1f
)))
<<
1
)
+
1
];
mod_dmrs
[(
m
<<
1
)
+
1
]
=
nr_mod_table
[((
NR_MOD_TABLE_BPSK_OFFSET
+
((
gold_pbch_dmrs
[
m
>>
5
]
&
(
1
<<
(
m
&
0x1f
)))
>>
(
m
&
0x1f
)))
<<
1
)
+
1
];
#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
_DMRS
printf
(
"m %d mod_dmrs %d %d
\n
"
,
m
,
mod_dmrs
[
2
*
m
],
mod_dmrs
[
2
*
m
+
1
]);
printf
(
"m %d mod_dmrs %d %d
\n
"
,
m
,
mod_dmrs
[
2
*
m
],
mod_dmrs
[
2
*
m
+
1
]);
#endif
#endif
}
}
...
@@ -75,7 +76,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
...
@@ -75,7 +76,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
l
=
ssb_start_symbol
+
1
;
l
=
ssb_start_symbol
+
1
;
for
(
int
m
=
0
;
m
<
60
;
m
++
)
{
for
(
int
m
=
0
;
m
<
60
;
m
++
)
{
#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
_DMRS
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
#endif
#endif
((
int16_t
*
)
txdataF
[
aa
])[(
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
]
=
(
a
*
mod_dmrs
[
m
<<
1
])
>>
15
;
((
int16_t
*
)
txdataF
[
aa
])[(
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
]
=
(
a
*
mod_dmrs
[
m
<<
1
])
>>
15
;
...
@@ -91,7 +92,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
...
@@ -91,7 +92,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
l
++
;
l
++
;
for
(
int
m
=
60
;
m
<
84
;
m
++
)
{
for
(
int
m
=
60
;
m
<
84
;
m
++
)
{
#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
_DMRS
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
#endif
#endif
((
int16_t
*
)
txdataF
[
aa
])[(
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
]
=
(
a
*
mod_dmrs
[
m
<<
1
])
>>
15
;
((
int16_t
*
)
txdataF
[
aa
])[(
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
]
=
(
a
*
mod_dmrs
[
m
<<
1
])
>>
15
;
...
@@ -107,7 +108,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
...
@@ -107,7 +108,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
l
++
;
l
++
;
for
(
int
m
=
84
;
m
<
NR_PBCH_DMRS_LENGTH
;
m
++
)
{
for
(
int
m
=
84
;
m
<
NR_PBCH_DMRS_LENGTH
;
m
++
)
{
#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
_DMRS
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
#endif
#endif
((
int16_t
*
)
txdataF
[
aa
])[(
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
]
=
(
a
*
mod_dmrs
[
m
<<
1
])
>>
15
;
((
int16_t
*
)
txdataF
[
aa
])[(
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
]
=
(
a
*
mod_dmrs
[
m
<<
1
])
>>
15
;
...
@@ -121,8 +122,8 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
...
@@ -121,8 +122,8 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
}
}
#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
_DMRS
write_output
(
"txdataF
.m"
,
"txdataF
"
,
txdataF
[
0
],
frame_parms
->
samples_per_frame_wCP
>>
1
,
1
,
1
);
write_output
(
"txdataF
_pbch_dmrs.m"
,
"txdataF_pbch_dmrs
"
,
txdataF
[
0
],
frame_parms
->
samples_per_frame_wCP
>>
1
,
1
,
1
);
#endif
#endif
return
0
;
return
0
;
}
}
...
@@ -161,7 +162,7 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
...
@@ -161,7 +162,7 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
NR_DL_FRAME_PARMS
*
frame_parms
)
NR_DL_FRAME_PARMS
*
frame_parms
)
{
{
int
m
,
k
,
l
;
int
k
,
l
,
ssb_sc_idx
;
int16_t
a
;
int16_t
a
;
int16_t
mod_pbch_e
[
NR_POLAR_PBCH_E
<<
1
];
int16_t
mod_pbch_e
[
NR_POLAR_PBCH_E
<<
1
];
uint8_t
sfn_4lsb
,
idx
=
0
;
uint8_t
sfn_4lsb
,
idx
=
0
;
...
@@ -182,18 +183,27 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
...
@@ -182,18 +183,27 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
pbch
->
pbch_a
[
NR_PBCH_PDU_BITS
+
4
]
=
n_hf
;
// half frame index bit
pbch
->
pbch_a
[
NR_PBCH_PDU_BITS
+
4
]
=
n_hf
;
// half frame index bit
pbch
->
pbch_a
[
NR_PBCH_PDU_BITS
+
5
]
=
(
config
->
sch_config
.
ssb_subcarrier_offset
.
value
>>
5
)
&
1
;
//MSB of k0 -- Note the case Lssb=64 is not supported (FR2)
pbch
->
pbch_a
[
NR_PBCH_PDU_BITS
+
5
]
=
(
config
->
sch_config
.
ssb_subcarrier_offset
.
value
>>
5
)
&
1
;
//MSB of k0 -- Note the case Lssb=64 is not supported (FR2)
#ifdef DEBUG_PBCH_ENCODING
#endif
// Scrambling
// Scrambling
nr_pbch_scrambling
((
uint32_t
)
config
->
sch_config
.
physical_cell_id
.
value
,
pbch
->
pbch_a
,
NR_POLAR_PBCH_PAYLOAD_BITS
);
nr_pbch_scrambling
((
uint32_t
)
config
->
sch_config
.
physical_cell_id
.
value
,
pbch
->
pbch_a
,
NR_POLAR_PBCH_PAYLOAD_BITS
);
#ifdef DEBUG_PBCH_ENCODING
#endif
/// CRC, coding and rate matching
/// CRC, coding and rate matching
polar_encoder
(
pbch
->
pbch_a
,
pbch
->
pbch_e
,
&
frame_parms
->
pbch_polar_params
);
polar_encoder
(
pbch
->
pbch_a
,
pbch
->
pbch_e
,
&
frame_parms
->
pbch_polar_params
);
#ifdef DEBUG_PBCH_ENCODING
#endif
/// QPSK modulation
/// QPSK modulation
for
(
int
i
=
0
;
i
<
NR_POLAR_PBCH_E
>>
2
;
i
++
){
for
(
int
i
=
0
;
i
<
NR_POLAR_PBCH_E
>>
1
;
i
++
){
idx
=
(
pbch
->
pbch_e
[
i
<<
2
]
&
1
)
^
((
pbch
->
pbch_e
[(
i
<<
2
)
+
1
]
&
1
)
<<
1
);
idx
=
(
pbch
->
pbch_e
[
i
<<
1
]
&
1
)
^
((
pbch
->
pbch_e
[(
i
<<
1
)
+
1
]
&
1
)
<<
1
);
mod_pbch_e
[
i
<<
2
]
=
nr_mod_table
[(
NR_MOD_TABLE_QPSK_OFFSET
+
idx
)
<<
1
];
mod_pbch_e
[
i
<<
1
]
=
nr_mod_table
[(
NR_MOD_TABLE_QPSK_OFFSET
+
idx
)
<<
1
];
mod_pbch_e
[(
i
<<
2
)
+
1
]
=
nr_mod_table
[((
NR_MOD_TABLE_QPSK_OFFSET
+
idx
)
<<
1
)
+
1
];
mod_pbch_e
[(
i
<<
1
)
+
1
]
=
nr_mod_table
[((
NR_MOD_TABLE_QPSK_OFFSET
+
idx
)
<<
1
)
+
1
];
#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
printf
(
"i %d mod_pbch %d %d
\n
"
,
i
,
mod_pbch_e
[
2
*
i
],
mod_pbch_e
[
2
*
i
+
1
]);
printf
(
"i %d mod_pbch %d %d
\n
"
,
i
,
mod_pbch_e
[
2
*
i
],
mod_pbch_e
[
2
*
i
+
1
]);
...
@@ -201,55 +211,79 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
...
@@ -201,55 +211,79 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
}
}
/// Resource mapping
/// Resource mapping
/*
a = (config->rf_config.tx_antenna_ports.value == 1) ? amp : (amp*ONE_OVER_SQRT2_Q15)>>15;
a
=
(
config
->
rf_config
.
tx_antenna_ports
.
value
==
1
)
?
amp
:
(
amp
*
ONE_OVER_SQRT2_Q15
)
>>
15
;
for
(
int
aa
=
0
;
aa
<
config
->
rf_config
.
tx_antenna_ports
.
value
;
aa
++
)
for
(
int
aa
=
0
;
aa
<
config
->
rf_config
.
tx_antenna_ports
.
value
;
aa
++
)
{
{
// PBCH
DMRS are mapped within the SSB block on every fourth subcarrier starting from nushift of symbols 1, 2, 3
// PBCH
modulated symbols are mapped within the SSB block on symbols 1, 2, 3 excluding the subcarriers used for the PBCH DMRS
///symbol 1 [0
+nushift:4:236+nushift] -- 6
0 mod symbols
///symbol 1 [0
:239] -- 18
0 mod symbols
k = frame_parms->first_carrier_offset + frame_parms->ssb_start_subcarrier
+ nushift
;
k
=
frame_parms
->
first_carrier_offset
+
frame_parms
->
ssb_start_subcarrier
;
l
=
ssb_start_symbol
+
1
;
l
=
ssb_start_symbol
+
1
;
ssb_sc_idx
=
0
;
for (int m = 0; m <
6
0; m++) {
for
(
int
m
=
0
;
m
<
18
0
;
m
++
)
{
#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
#endif
#endif
((int16_t*)txdataF[aa])[(l*frame_parms->ofdm_symbol_size + k)<<1] = (a * mod_dmrs[m<<1]) >> 15;
if
((
ssb_sc_idx
&
3
)
==
nushift
)
{
//skip DMRS
((int16_t*)txdataF[aa])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1] = (a * mod_dmrs[(m<<1) + 1]) >> 15;
k
++
;
k+=4;
ssb_sc_idx
++
;
}
else
{
((
int16_t
*
)
txdataF
[
aa
])[(
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
]
=
(
a
*
mod_pbch_e
[
m
<<
1
])
>>
15
;
((
int16_t
*
)
txdataF
[
aa
])[((
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
)
+
1
]
=
(
a
*
mod_pbch_e
[(
m
<<
1
)
+
1
])
>>
15
;
k
++
;
ssb_sc_idx
++
;
}
if
(
k
>=
frame_parms
->
ofdm_symbol_size
)
if
(
k
>=
frame_parms
->
ofdm_symbol_size
)
k
-=
frame_parms
->
ofdm_symbol_size
;
k
-=
frame_parms
->
ofdm_symbol_size
;
}
}
///symbol 2 [0
+u:4:44+nushift ; 192+nu:4:236+nushift] -- 24
mod symbols
///symbol 2 [0
:47 ; 192:239] -- 72
mod symbols
k = frame_parms->first_carrier_offset + frame_parms->ssb_start_subcarrier
+ nushift
;
k
=
frame_parms
->
first_carrier_offset
+
frame_parms
->
ssb_start_subcarrier
;
l
++
;
l
++
;
ssb_sc_idx
=
0
;
for (int m =
60; m < 84
; m++) {
for
(
int
m
=
180
;
m
<
252
;
m
++
)
{
#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
#endif
#endif
((int16_t*)txdataF[aa])[(l*frame_parms->ofdm_symbol_size + k)<<1] = (a * mod_dmrs[m<<1]) >> 15;
if
((
ssb_sc_idx
&
3
)
==
nushift
)
{
((int16_t*)txdataF[aa])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1] = (a * mod_dmrs[(m<<1) + 1]) >> 15;
k
+=
(
m
==
47
)
?
145
:
1
;
k+=(m==71)?148:4; // Jump from 44+nu to 192+nu
ssb_sc_idx
+=
(
m
==
47
)
?
145
:
1
;
}
else
{
((
int16_t
*
)
txdataF
[
aa
])[(
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
]
=
(
a
*
mod_pbch_e
[
m
<<
1
])
>>
15
;
((
int16_t
*
)
txdataF
[
aa
])[((
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
)
+
1
]
=
(
a
*
mod_pbch_e
[(
m
<<
1
)
+
1
])
>>
15
;
k
+=
(
m
==
47
)
?
145
:
1
;
ssb_sc_idx
+=
(
m
==
47
)
?
145
:
1
;
}
if
(
k
>=
frame_parms
->
ofdm_symbol_size
)
if
(
k
>=
frame_parms
->
ofdm_symbol_size
)
k
-=
frame_parms
->
ofdm_symbol_size
;
k
-=
frame_parms
->
ofdm_symbol_size
;
}
}
///symbol 3 [0
+nushift:4:236+nushift] -- 6
0 mod symbols
///symbol 3 [0
:239] -- 18
0 mod symbols
k = frame_parms->first_carrier_offset + frame_parms->ssb_start_subcarrier
+ nushift
;
k
=
frame_parms
->
first_carrier_offset
+
frame_parms
->
ssb_start_subcarrier
;
l
++
;
l
++
;
ssb_sc_idx
=
0
;
for (int m =
84; m < NR_PBCH_DMRS_LENGTH
; m++) {
for
(
int
m
=
252
;
m
<
NR_POLAR_PBCH_E
>>
1
;
m
++
)
{
#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
printf
(
"m %d at k %d of l %d
\n
"
,
m
,
k
,
l
);
#endif
#endif
((int16_t*)txdataF[aa])[(l*frame_parms->ofdm_symbol_size + k)<<1] = (a * mod_dmrs[m<<1]) >> 15;
if
((
ssb_sc_idx
&
3
)
==
nushift
)
{
((int16_t*)txdataF[aa])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1] = (a * mod_dmrs[(m<<1) + 1]) >> 15;
k
++
;
k+=4;
ssb_sc_idx
++
;
}
else
{
((
int16_t
*
)
txdataF
[
aa
])[(
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
]
=
(
a
*
mod_pbch_e
[
m
<<
1
])
>>
15
;
((
int16_t
*
)
txdataF
[
aa
])[((
l
*
frame_parms
->
ofdm_symbol_size
+
k
)
<<
1
)
+
1
]
=
(
a
*
mod_pbch_e
[(
m
<<
1
)
+
1
])
>>
15
;
k
++
;
ssb_sc_idx
++
;
}
if
(
k
>=
frame_parms
->
ofdm_symbol_size
)
if
(
k
>=
frame_parms
->
ofdm_symbol_size
)
k
-=
frame_parms
->
ofdm_symbol_size
;
k
-=
frame_parms
->
ofdm_symbol_size
;
...
@@ -259,9 +293,9 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
...
@@ -259,9 +293,9 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
write_output("txdataF
.m", "txdataF
", txdataF[0], frame_parms->samples_per_frame_wCP>>1, 1, 1);
write_output
(
"txdataF
_pbch.m"
,
"txdataF_pbch
"
,
txdataF
[
0
],
frame_parms
->
samples_per_frame_wCP
>>
1
,
1
,
1
);
#endif
#endif
*/
return
0
;
return
0
;
}
}
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