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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： | 10/23页 |
| 文件大小： | 415K |
| 代理商： | TPTDSCDMAWP |
Spatial Temporal Processing in TD-SCDMA
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18
7.
Estimation of transmitted data
Based on the directional channel impulse response, we will estimate the transmitted data. As we
will see, beam-forming will be generated for each DoA path and all the DoA paths of the same
user will be coherently combined to enhance the system’s performance.
We define vector d as the transmitted data column vector of length KN for all K users;
d = [d
(1)T, d(2)T,……, d(K)T]T
where d
(k)T is user k’s transmitted data vector of length N
Define matrix E the received signal matrix with dimension (NQ+W-1) x Ka:
E = [ e
(1), e(2),….., e(Ka)],
where e
(ka) is the received signal vector of length NQ+W-1 from
antenna ka. And we also define e = vec{E} and the combined noise vector
n = [n
(1)T, n(2)T,……, n(K)T]T
of length (NQ+W-1)Ka:
The data d has to been spreaded by the special signature code before it can be transmitted, thus
we define the spreading signature code matrix for user k:
N blocks = NQ rows
Q
N
C
(k) = I(N)
c(k) =
Figure 7-1 Structure of the Spreading signature code matrix
Where c
(k) is the special signature code for user k, k=1…K. Stack all C(k) k=1…K together to form
the combined signature code matrix
C = blockdiag[ C
(1)
, C
(2)
,….., C
(K)
]
The spreaded data can be written as:
C d = blockdiag[ C
(1)
, C
(2)
,….., C
(K)
] [d
(1)T, d(2)T,……, d(K)T]T
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