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| 型号： | TPTDSCDMAWP |
| 英文描述： | Spatial Temporal Processing in TD-SCDMA |
| 中文描述： | 时间空间处理在TD - SCDMA |
| 文件页数： | 9/23页 |
| 文件大小： | 415K |
| 代理商： | TPTDSCDMAWP |
Spatial Temporal Processing in TD-SCDMA
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17
6.
Directional channel impulse response
The directional channel impulse response is based on each directional signal path. It is the
impulse response between a given directional signal path and reference point. Based on (7)
T
k
d
T
kd
k
kd
k
Kd
kd
k
)
(
)
(
)
,
(
)
,
(
d
)
(
1
)
(
A
H
a
h
H
=
∑
=
if H
(k) and A(k)T can be obtained or estimated, then H
d
(k) can be derived.
From
e
m = vec{G H } + nm = Gdhd + nm
we have the ML estimator of hd
m
d
H
d
m
d
H
d
e
R
G
R
G
h
1
)
~
(
)
~
(
=
where
1
)
~
(
=
d
m
d
H
d
m
G
R
G
X
is the decorrelator filter and
1
)
~
@
(
m
d
H
d
R
G
is the
spatial-temporal whitening matched filter and
()
()
=
=
1
)
1
(
1
)
1
(
1
)
1
(
1
)
1
(
1
)
(
)
(
1
)
1
(
)
1
(
1
~
)
(
m
H
d
m
H
d
m
d
K
m
d
m
d
H
d
R
G
R
A
R
G
R
A
R
G
A
R
G
A
R
G
H
Then we have
~
Vec{G
(1)HR
m
-1 Em (Rd -1)*A(1)* }
Vec{G
(2)HR
m
-1 E
m (Rd
-1)*A(2)* }
Vec{G
(K)HR
m
-1 Em (Rd -1)*A(K)* }
Gd
H(R
d
Rm) -1 vec{Em}=
Where G
(k)HR
m
-1 is the temporal whitening matched filter and (R
d
-1)*A(k)* is the spatial whitening
matched filter of the user k.
We define the spatial whitening matched filter
W
(k) =(R
d
-1)*A(k)* = [ w(k,1), w(k,2),….., w(k,Kd(k))], thus w(k,kd) is beanformed for the k
d’s DoA.
~
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