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1
also reduces
times. In multiple cells capacity function can be drawn in
1
−
F
Equation (13)
N
sin
gle
N
=
=
N
⋅
(
−
F
)
multi
1
sin
gle
(13)
1
−
F
f
is frequency multiplexing factor
f
=
1
−
F
(14)
Equation (13),(14) will be inserted Equation (11) , Equation (15) can be drawn.
G
⋅
N
=
[
+
]
⋅
f
multi
E
(15)
(
b
)
⋅
∂
AF
N
o
Result analysis:
The limit capacity is relevant of many parameters of base stations
such as demodulation abilities, service active factor, spread spectrum factor and
multiplexing factor in a variety of channel conditions [9][10]. Higher is sensitivity of
base station and Stronger is demodulation ability, lower
E
b
requirements is
acquired by base station. It can help to increase the coverage and increase capacity to
base station [11]. Whereas in multiple cells environment, the frequency multiplexing
means that interference will increase.
/
N
0
4 Conclusions
This paper analyzes the capacity of uplink transmission channel based on the several
assumed parameters of the TD-SCDMA specifications and cell-loading concept.
Neighbor cell interference is analyzed and limit load-capacity can be calculated with
respect to the formula that has been deduced. Based on the analysis and evaluation of
uplink capacity TD-SCDMA system, the equations can be utilized for establishing the
effective cell planning and optimization scenario for TD-SCDMA system further
deployment. What's more, it provides a theoretical basis and technical support for
large-scale commercial operations.
Acknowledgment
The title selection is mainly originated from Tianjin science and technology
innovation special funds project(10FDZDGX00400) and Tianjin Key Laboratory for
Control Theory and Application in Complicated Systems, Tianjin University of
Technology, Tianjin 300384, China. The name of the project is “the research and
development, demonstration and application of new generation mobile
communication network coverage key technology”.
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