RECOMMENDATION ITU-R SM.1046-1 DEFINITION OF SPECTRUM USE AND EFFICIENCY OF A RADIO SYSTEM
ANNEX 1 General criteria for the evaluation of spectrum utilization factor and spectrum efficiency
1 Spectrum utilization factor
2 Spectrum utilization efficiency (SUE)
3 Relative spectrum efficiency (RSE)
4 Comparison of spectrum efficiencies
ANNEX 2 Examples
1 Spectrum use by land mobile radio systems
    1.1 Spectrum efficiency of an indoor pico-cellular radio system
    1.2 RSE of land mobile radio systems
    1.3 SUE of land mobile radio systems
2 Spectrum use by radio-relay systems
    2.1 Introduction
    2.2 SUE for a long artery with branching links at the nodes
    2.3 SUE in randomly arranged radio-relay links
    2.4 Assessing spectrum conserving properties of new technology for digital radio-relay systems
    2.5 RSE of single-hop rural radio-relay links