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Green Communications and Networking
book

Green Communications and Networking

by F. Richard Yu, Xi Zhang, Victor C.M. Leung
April 2016
Intermediate to advanced content levelIntermediate to advanced
399 pages
11h 49m
English
CRC Press
Content preview from Green Communications and Networking
18 Power-Efficient Last Mile Access
as femtocells and BWA-FMDA have to limit their transmission power to meet
radio spectrum regulations and lower health concerns.
Taking microBS-6 as an example, we can extrapolate its spectral efficien-
cies at P
tx
=10
3
and P
tx
=10
4
mW/MHz per AE as 116.49 and 136.72 bps/Hz,
respectively. The corresponding energy consumption equals 87.54 and 141
watts. Thus, we can calculate the energy efficiency as 1.3307 bit/Joule when
P
tx
=10
3
mW/MHz and 0.9696 bit/Joule when P
tx
=10
4
mW/MHz. There-
fore, there exists a sudden drop on the micro BS energy efficiency for P
tx
larger than certain values in the range [10
3
,10
4
] mW/MHz. In practice, as
P
tx
becomes too large, the excessive micro BS transmit power will cause severe
interference to neighbor ...
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Publisher Resources

ISBN: 9781439899144