Spectrum Efficiency Metrics
Additional Efficiency Considerations
These additional efficiency considerations need to be evaluated in addition to the spectrum efficiency metric so that a comprehensive determination of the satellite system efficiency is properly made.
Satellite system user value
is enhanced when the size
of the antenna is reduced.
There is a correlation
, however, between user antenna size and the spectrum efficiency metric.
Within certain limits
increasing the antenna size
hence decreasing user value
, will allow greater spectrum efficiency through the use of higher order modulations (i.e., moving from QPSK to 8PSK to 16QAM etc.). In terms of overall system
optimization and user value
, it is not always desirable to use the largest possible antenna sizes to achieve the greatest spectrum efficiency. Antenna size must therefore be included as an additional efficiency consideration when evaluating the spectrum efficiency metric of satellite systems.
bureaus -> Before the Federal Communications Commission Washington, D
bureaus -> Responses to Written fcc questions Dated August 25, 2000 Concerning the February 29, 2000
bureaus -> Remarks of Jamie Barnett, Rear Admiral (Retired) Chief, Public Safety & Homeland Security Bureau
bureaus -> Request for Review of the Decision of the Universal Service Administrator by
bureaus -> Federal Communications Commission fcc 00-207
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