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Michael Black
OpenXG UE
Commits
160d71a4
Commit
160d71a4
authored
Apr 11, 2019
by
Javier Morgade
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Implemented FeMBMS Channel Estimation (1.25 KHz @ 25 RB)
parent
f71ed4af
Changes
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openair1/PHY/LTE_ESTIMATION/lte_dl_mbsfn_channel_estimation.c
...air1/PHY/LTE_ESTIMATION/lte_dl_mbsfn_channel_estimation.c
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openair1/PHY/LTE_ESTIMATION/lte_dl_mbsfn_channel_estimation.c
View file @
160d71a4
...
@@ -24,6 +24,8 @@
...
@@ -24,6 +24,8 @@
#include "lte_estimation.h"
#include "lte_estimation.h"
#include "PHY/LTE_REFSIG/lte_refsig.h"
#include "PHY/LTE_REFSIG/lte_refsig.h"
#include "filt96_32_khz_1dot25.h"
//#define DEBUG_CH
//#define DEBUG_CH
int
lte_dl_mbsfn_channel_estimation
(
PHY_VARS_UE
*
ue
,
int
lte_dl_mbsfn_channel_estimation
(
PHY_VARS_UE
*
ue
,
module_id_t
eNB_id
,
module_id_t
eNB_id
,
...
@@ -769,3 +771,185 @@ int lte_dl_mbsfn_channel_estimation(PHY_VARS_UE *ue,
...
@@ -769,3 +771,185 @@ int lte_dl_mbsfn_channel_estimation(PHY_VARS_UE *ue,
return
(
0
);
return
(
0
);
}
}
#if (LTE_RRC_VERSION >= MAKE_VERSION(14, 0, 0))
int
lte_dl_mbsfn_khz_1dot25_channel_estimation
(
PHY_VARS_UE
*
ue
,
module_id_t
eNB_id
,
uint8_t
eNB_offset
,
int
subframe
)
{
int
pilot_khz_1dot25
[
600
]
__attribute__
((
aligned
(
16
)));
unsigned
char
aarx
,
aa
;
unsigned
int
rb
;
int16_t
ch
[
2
];
short
*
pil
,
*
rxF
,
*
dl_ch
,
*
ch0
,
*
ch1
,
*
ch11
,
*
chp
,
*
ch_prev
;
int
ch_offset
,
symbol_offset
;
int
pilot_cnt
;
int16_t
*
f
,
*
f2
,
*
fl
,
*
f2l2
,
*
fr
,
*
f2r2
,
*
f2_dc
,
*
f_dc
;
unsigned
int
ofdm_symbol_size
;
unsigned
int
m
,
s
;
unsigned
int
k
;
// unsigned int n;
// int i;
int
**
dl_ch_estimates
=
ue
->
common_vars
.
common_vars_rx_data_per_thread
[
ue
->
current_thread_id
[
subframe
]].
dl_ch_estimates
[
0
];
int
**
rxdataF
=
ue
->
common_vars
.
common_vars_rx_data_per_thread
[
ue
->
current_thread_id
[
subframe
]].
rxdataF
;
ch_offset
=
0
;
//(l*(ue->frame_parms.ofdm_symbol_size));
symbol_offset
=
0
;
//ch_offset;//phy_vars_ue->lte_frame_parms.ofdm_symbol_size*l;
AssertFatal
(
ue
->
frame_parms
.
N_RB_DL
==
25
,
"OFDM symbol size %d not yet supported for FeMBMS %d
\n
"
,
ue
->
frame_parms
.
N_RB_DL
);
if
(
(
subframe
&
0x1
)
==
0
){
f
=
filt24_0_khz_1dot25
;
f2
=
filt24_2_khz_1dot25
;
fl
=
filt24_0_khz_1dot25
;
f2l2
=
filt24_2_khz_1dot25
;
fr
=
filt24_0r2_khz_1dot25
;
f2r2
=
filt24_2r_khz_1dot25
;
f_dc
=
filt24_0_dcr_khz_1dot25
;
f2_dc
=
filt24_2_dcl_khz_1dot25
;
}
else
{
f
=
filt24_0_khz_1dot25
;
f2
=
filt24_2_khz_1dot25
;
fl
=
filt24_0_khz_1dot25
;
f2l2
=
filt24_2_khz_1dot25
;
fr
=
filt24_0r2_khz_1dot25
;
f2r2
=
filt24_2r_khz_1dot25
;
f_dc
=
filt24_0_dcr_khz_1dot25
;
f2_dc
=
filt24_2_dcl_khz_1dot25
;
}
for
(
aarx
=
0
;
aarx
<
ue
->
frame_parms
.
nb_antennas_rx
;
aarx
++
)
{
// generate pilot
lte_dl_mbsfn_khz_1dot25_rx
(
ue
,
&
pilot_khz_1dot25
[
0
],
subframe
);
pil
=
(
short
*
)
&
pilot_khz_1dot25
[
0
];
rxF
=
(
short
*
)
&
rxdataF
[
aarx
][((
ue
->
frame_parms
.
first_carrier_offset_khz_1dot25
))];
dl_ch
=
(
short
*
)
&
dl_ch_estimates
[
aarx
][
ch_offset
];
memset
(
dl_ch
,
0
,
4
*
(
ue
->
frame_parms
.
ofdm_symbol_size_khz_1dot25
));
int
shift
;
if
(
(
subframe
&
0x1
)
==
0
){
rxF
+=
0
;
shift
=
0
;
k
=
0
;
}
else
{
rxF
+=
6
;
//2*3;
k
=
3
;
}
if
(
ue
->
frame_parms
.
N_RB_DL
==
25
){
ch
[
0
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
0
]
-
(
int32_t
)
pil
[
1
]
*
rxF
[
1
])
>>
15
);
ch
[
1
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
1
]
+
(
int32_t
)
pil
[
1
]
*
rxF
[
0
])
>>
15
);
multadd_real_vector_complex_scalar
(
fl
,
ch
,
dl_ch
,
24
);
pil
+=
2
;
// Re Im
rxF
+=
12
;
dl_ch
+=
8
;
ch
[
0
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
0
]
-
(
int32_t
)
pil
[
1
]
*
rxF
[
1
])
>>
15
);
ch
[
1
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
1
]
+
(
int32_t
)
pil
[
1
]
*
rxF
[
0
])
>>
15
);
multadd_real_vector_complex_scalar
(
f2l2
,
ch
,
dl_ch
,
24
);
pil
+=
2
;
// Re Im
rxF
+=
12
;
dl_ch
+=
16
;
for
(
pilot_cnt
=
2
;
pilot_cnt
<
299
;
pilot_cnt
+=
2
){
ch
[
0
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
0
]
-
(
int32_t
)
pil
[
1
]
*
rxF
[
1
])
>>
15
);
ch
[
1
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
1
]
+
(
int32_t
)
pil
[
1
]
*
rxF
[
0
])
>>
15
);
multadd_real_vector_complex_scalar
(
f
,
ch
,
dl_ch
,
24
);
pil
+=
2
;
// Re Im
rxF
+=
12
;
dl_ch
+=
8
;
ch
[
0
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
0
]
-
(
int32_t
)
pil
[
1
]
*
rxF
[
1
])
>>
15
);
ch
[
1
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
1
]
+
(
int32_t
)
pil
[
1
]
*
rxF
[
0
])
>>
15
);
multadd_real_vector_complex_scalar
(
f2
,
ch
,
dl_ch
,
24
);
pil
+=
2
;
rxF
+=
12
;
dl_ch
+=
16
;
}
rxF
=
(
int16_t
*
)
&
rxdataF
[
aarx
][((
symbol_offset
+
1
+
k
))];
//Skip DC offset
for
(
pilot_cnt
=
0
;
pilot_cnt
<
297
;
pilot_cnt
+=
2
){
ch
[
0
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
0
]
-
(
int32_t
)
pil
[
1
]
*
rxF
[
1
])
>>
15
);
ch
[
1
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
1
]
+
(
int32_t
)
pil
[
1
]
*
rxF
[
0
])
>>
15
);
multadd_real_vector_complex_scalar
(
f
,
ch
,
dl_ch
,
24
);
pil
+=
2
;
rxF
+=
12
;
dl_ch
+=
8
;
ch
[
0
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
0
]
-
(
int32_t
)
pil
[
1
]
*
rxF
[
1
])
>>
15
);
ch
[
1
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
1
]
+
(
int32_t
)
pil
[
1
]
*
rxF
[
0
])
>>
15
);
multadd_real_vector_complex_scalar
(
f2
,
ch
,
dl_ch
,
24
);
pil
+=
2
;
rxF
+=
12
;
dl_ch
+=
16
;
}
ch
[
0
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
0
]
-
(
int32_t
)
pil
[
1
]
*
rxF
[
1
])
>>
15
);
ch
[
1
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
1
]
+
(
int32_t
)
pil
[
1
]
*
rxF
[
0
])
>>
15
);
multadd_real_vector_complex_scalar
(
fr
,
ch
,
dl_ch
,
24
);
pil
+=
2
;
// Re Im
rxF
+=
12
;
dl_ch
+=
8
;
ch
[
0
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
0
]
-
(
int32_t
)
pil
[
1
]
*
rxF
[
1
])
>>
15
);
ch
[
1
]
=
(
int16_t
)(((
int32_t
)
pil
[
0
]
*
rxF
[
1
]
+
(
int32_t
)
pil
[
1
]
*
rxF
[
0
])
>>
15
);
multadd_real_vector_complex_scalar
(
f2r2
,
ch
,
dl_ch
,
24
);
}
}
return
(
0
);
}
#endif
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