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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： | 2/23页 |
| 文件大小： | 415K |
| 代理商： | TPTDSCDMAWP |
Spatial Temporal Processing in TD-SCDMA
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10
Similarly, we have the noise vector for antenna ka
[
]T
ka
W
NQ
ka
n
)
(
1
)
(
2
)
(
1
)
(
+
=
n
(5)
and
[]T
Ka )
(
)
2
(
)
1
(
n
N
=
n = vec [N]
(6)
The transmission of the block on N symbols can be modeled by a system of
linear equations that relates the spreading codes, the channel’s input response
and the impact of noise in the signal.
3.2.
Received Signal Model
The received sequence received at chip rate from the ka
th antenna is:
e
(ka)
= (e
1
(ka)
, e
2
(ka)
, . . . , e
NQ+W-1
(ka)
)
T
(7)
where Q again is the spreading factor of the data symbol and W is the number
of taps in channel.
[]T
Ka )
(
)
2
(
)
1
(
.
,
e
E
=
e = vec[E]
(8)
From Figure 3-1 we can see that
()
)
,
(
)
,
(
1
)
,
(
2
)
,
(
1
)
,
(
*
)
(
,
ka
k
T
ka
k
W
Q
ka
k
ka
k
ka
k
b
h
c
b
=
+
(9)
Is the convolution of the channel input response with the corresponding spreading code.
(
)
,
(
ka
k
h
is the channel impulse response between the user k and antenna ka, c(k) is the
spreading code of the user k.)
Then the we can see that the signal arriving at the receiver can be described by
a linear system of equations that relate the user’s signal and the receiver input:
N
d
I
A
E
+
=
)
(
)
( Ka
(10)
Where,
8 is the Kronecker product .
Or
n
Ad
e
+
=
(11)
The matrix A is called channel matrix and is defined as
[]T
Ka )
(
)
2
(
)
1
(
A
=
(12)
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