Page 169 - Integrated Wireless Propagation Models

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M a c r o c e I P r e d i c t i o n M o d e I - s P a r t 2 : P o i n - t o - P o i n t M o d e I s 147

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The basic m i croce l concept
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U

m
FIGURE 3.1.7.2.1 Lee's i crocell syste .
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Intelligent mlcrocell capacity application

Microcell utilizes 01 JR1 = 4.6
for active zone separation
This provides a D = 3R for
microcell cell separation
R
This yields a K 3 = (O� )2
=
This is a 2 to 2.5 capacity

FIGURE 3.1.7.2.2 Capacity n creases n the i croce l system as n terference is reduced.
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trunking efficiency. The recent movement in digital modulation technology has helped
cope with the increase in subscribers' demands. In the early years, the analog systems
were sharing the frequency spectrum with the digital systems. There were more inter­
ference coming from the analog system into the digital systems. One economical
approach to solve this problem is to use the smart antenna.