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| 型號： | ZFBLEWP |
| 英文描述： | ZF-BLE Joint Detection for TD-SCDMA |
| 中文描述： | 迫零線性均衡的聯(lián)合檢測的TD - SCDMA |
| 文件頁數(shù)： | 10/20頁 |
| 文件大?。?/td> | 316K |
| 代理商： | ZFBLEWP |
10
3.
System Model
3.1.
Channel Model
In a TD-SCDMA system, we have K users who access the channel simultaneously. On
the same frequency and in the same time slot. Figure 3-1 shows a general model of a TD-
SCDMA System.
C
(1)
C
(k)
C
(K)
h
(1)
h
(k)
h
(K)
n
mation
M
M
M
M
M
M
e
)
b
)
b
)
b
Data
Esti -
)
d
)
(
k
d
)
(
K
d
)
d
)
(
k
d
)
(
K
d
(
K
(
k
Figure 3-1 Discrete base band model of a block transmission CDMA system.
In the system of Figure 3-1 we assume that there are K
a
antennas for the receiver .
The k
th
user transmits a data symbol sequence block with N symbols:
(
N
d
d
d
2
1
,
K
d
[
d
d
d
d
2
1
1
1
,
,
,
K
d
)
T
k
k
k
k
)
(
)
(
)
(
)
(
=
k = 1,2,…..,K
(1)
]
T
k
N
N
N
k
k
k
d
d
d
d
d
)
(
)
(
)
)
(
2
)
(
2
)
)
(
)
(
)
)
(
,
,
,
,
,
,
K
K
K
=
(2)
Where N is the number of symbols in each data block.
(
Q
d
c
c
2
1
K
c
)
T
k
k
k
k
)
(
)
(
)
(
)
(
=
k = 1, 2 … K
(3)
)
(
k
c
spreading factor. All users are assumed to be at the same spreading factor.
Each of the K channels in the system is characterized by its impulse response
[
W
h
h
h
2
1
K
h
is the k
th
user signature, N is the number of symbols in each data block and Q is the
]
T
k
k
k
k
)
(
)
(
)
(
)
(
=
k = 1,2 … K
(4)
Where W is the number of taps in the channel.
Similarly, we have the noise vector for antenna k
a
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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