MIL-STD-187-721 Interoperability And Performance Standard For Advanced Adaptive Hf RadioThe purpose of this document is to describe the technical parameters for adaptive high frequency HF radio that are more advanced than those described in MIL-STD-188-141. The advanced technology contained in this standard will guide the planning of military adaptive HF radio network technology into the 21st century. To fully understand and utilize this document, it is necessary to refer to portions of MIL-STD-188-141.

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MIL-STD-187-721D

FIGURE 26.  HFDLP ALM assign frequency CMD. .....................................................................51

FIGURE 27.  HFDLP ALM change frequency CMD.....................................................................52

FIGURE 28.  HFDLP ALM adjust power CMD............................................................................52

FIGURE 29.  HFDLP ALM CMD embedding in data frame..........................................................53

FIGURE 30.  Coarse location CMD..............................................................................................54

FIGURE 31.  One-Minute location CMD. .....................................................................................55

Table

TABLES

TABLE I.  New ALE or orderwire CMD words............................................................................13

TABLE II.  Example, sounding interval calculation. ......................................................................17

TABLE III.  Tune time encoding...................................................................................................21

TABLE IV.  Mode field encoding. ................................................................................................21

TABLE V.  Control bit assignments (LQA report CMD word)......................................................24

TABLE VI.  Age field encoding. ...................................................................................................26

TABLE VII.  ALE tone weighting factors.....................................................................................27

TABLE VIII.  Ei  to Wi  conversion (1 dB    Ei     12 dB)..................................................................28

TABLE IX.   Maximum BER for each spectral distortion region (boundary coordinates)...............30

TABLE X.  PBER code ranges for each spectral distortion region.................................................32

TABLE XI.  Word error statistics. ................................................................................................33

TABLE XII.  Available data capacity symbols...............................................................................34

TABLE XIII.  Epoch field encoding..............................................................................................35

TABLE XIV.  Control bit assignments. .........................................................................................36

TABLE XV.  Channel quality measure selector bit assignments.....................................................37

TABLE XVI.  Quantization of channel quality measure thresholds, error-free interval reports, and exceedance percentages..........................................................................................38

TABLE XVII.  Analog port selection bits......................................................................................42

TABLE XVIII.  Groups of ALE scheduling functions. ..................................................................44

TABLE XIX.  Time codes for scheduling......................................................................................45

TABLE XX.  HFDLP ALM commands.........................................................................................50

TABLE XXI.  Flags in HFDLP ALM frequency CMDs.................................................................51

TABLE XXII.  Flags in HFDLP ALM adjust power CMD............................................................52

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