Spectrum Efficiency Metrics



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Point-to-point Systems


Point-to-point satellite systems are intended to establish many individual communication links between two points (senders and receivers) to allow information, typically digital data, to flow between those two points. The satellite system establishes this capability across the satellite’s service area (coverage area). Because adding users does consume system capacity, unlike broadcast satellite systems, consideration does need to be given to the system capacity per area, since the number of potential users is proportional to the size of the service area. Capacity per service area can be increased via frequency re-use, similar to terrestrial cellular systems, so the spectrum efficiency metric should give credit to higher levels of frequency re-use.8
The proposed spectrum efficiency metric is Information bits per second per Hz of spectrum consumed per square kilometer of service area (“bits / (second – Hz – sq. km.)”).



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