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RECOMMENDATION ITU-R F.592-4    2
Vocabulary of terms for the fixed service    2
Scope    3
1    Terms relating to radio transmission 3
       1.1    Fixed wireless system (FWS) 3
       1.2    Radio-relay system   4
       1.3    High‑density applications in the fixed service (HDFS) 4
       1.4    High altitude platform station (HAPS) 4
       1.5    Fixed wireless access (FWA) 5
       1.6    Trans-horizon radio-relay system   5
       1.7    Point-to-point communication 5
                 1.7.1    Terminal station (point-to-point) 6
                 1.7.2    Repeater station (point-to-point) 6
                 1.7.3    Drop-insert (of a payload) 6
       1.8    Point-to-multipoint communication 7
                 1.8.1    Digital radio concentrator (system) 7
                 1.8.2    Central station 7
                 1.8.3    Terminal station (point-to-multipoint) 7
A:    7
محطة مركزية (من نقطة إلى عدة نقاط)    7
R    7
оконечная станция (при связи пункта со многими пунктами)    7
                 1.8.4    Repeater station (point-to-multipoint) 8
       1.9    Terms related to channel arrangements 8
                 1.9.1    (Orthogonal) co-channel 8
                 1.9.2    Alternated 8
                 1.9.3    Interleaved 8
                 1.9.4    Co-channel dual polarization/polarized (CCDP) 9
      1.10    Terms related to diversity 9
                 1.10.1    Diversity reception 9
                 1.10.2    Order of diversity 9
                 1.10.3    Space diversity reception 10
                 1.10.4    Frequency diversity reception 10
      1.11    Cross polarization interference canceller (XPIC) (circuit) 10
      1.12    Multi-carrier transmission 11
      1.13    Automatic transmit power control (ATPC) 11
2    Terms relating to availability and error performance for digital paths and connections (See ITU‑T Recommendations G.821, G.826, G.827 and G.828)    11
       2.1    Availability performance 11
       2.2    Error performance 12
                 2.2.1    Terms relating to international digital connections at a bit rate below the primary rate    12
Events    12
Parameters    13
                 2.2.2    Terms relating to international digital paths at a bit rate at or above the primary rate    14
Events    14
Parameters    14
3    Terms relating to sharing studies 14
       3.1    Fractional degradation in performance (FDP) 14
       3.2    Reference radiation pattern 15
4    Terms relating to digital modulation 15
       4.1    n-state quadrature amplitude modulation (symbol: n-QAM) 15
       4.2    Simple modulation 15
       4.3    Multi-level modulation 16
       4.4    Multi-state modulation 16
       4.5    Adaptive modulation 16
5    Acronyms 16

CONTENTS