Aircraft Interferer Vs Aircraft Victim; Separation Distances

AMCP/WG-B14/WP-4

13/01/03

VDL MODE 2/3 INTERFERENCE TO AM-DSB

(based on free space propagation at 128 MHz)

Aircraft INTERFER vs Aircraft VICTIM

Based on "new mask" but before WG B had agreed on values

For feeder loss and antenna gain

Channel Offset (measurement bandwidth (kHz) / 1st (16 kHz) / 2nd (25 kHz) / 4th (25 kHz) / 8th (25 kHz) / 16th (25 kHz) / 32nd (25 kHz)
Desired signal level at the receiver antenna (dBm) / -82 / -82 / -82 / -82 / -82 / -82
Receiver antenna gain (dB) / 0 / 0 / 0 / 0 / 0 / 0
Receiver feeder loss (dB) / 0 / 0 / 0 / 0 / 3 / 0
D/U in receiver passband (dB) / 30 / 30 / 30 / 30 / 30 / 30
Maximum level of interfering signal (dBm) / -112 / -112 / -112 / -112 / -112 / -112
Modulation scheme mask (dBm) / -18 / -28 / -38 / -43 / -48 / -53
Bandwidth correction factor (dB) / 0 / 2 / 2 / 2 / 2 / 2
Transmitter feeder loss (dB) / 0 / 0 / 0 / 0 / 0 / 0
Transmitter antenna gain (dB) / 0 / 0 / 0 / 0 / 0 / 0
Receiver antenna gain (dB) / 0 / 0 / 0 / 0 / 0 / 0
Receiver feeder loss (dB) / 0 / 0 / 0 / 0 / 0 / 0
Minimum required path loss (dB) / 94 / 82 / 72 / 67 / 62 / 57
Required Separation distance (nmi) / 5.03 / 1.26 / .40 / .23 / .13 / .07
Required Separation distance (m) / 9324 / 2342 / 741 / 417 / 234 / 132

The Following is excerpted from

Annex D of WG B Toulouse meeting

September 99

(with added columns for 3rd and 5th channel offset using linear interpolation in dB)

Aircraft INTERFER vs Aircraft VICTIM

Channel Offset (measurement bandwidth (kHz) / 1st (16 kHz) / 2nd (25 kHz) / 3rd (25 kHz) / 4th (25 kHz) / 5th (25 kHz) / 8th (25 kHz) / 16th (25 kHz) / 32nd (25 kHz)
Desired signal level at the receiver antenna (dBm) / -82 / -82 / -82 / -82 / -82 / -82 / -82 / -82
Receiver antenna gain (dB) / 0 / 0 / 0 / 0 / 0 / 0 / 0 / 0
Receiver feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
D/U in receiver passband (dB) / 30 / 30 / 30 / 30 / 30 / 30 / 30 / 30
Maximum level of interfering signal (dBm) / -115 / -115 / -115 / -115 / -115 / -115 / -115 / -115
Modulation scheme mask (dBm) / -18 / -28 / -33* / -38 / -39.25* / -43 / -48 / -53
Bandwidth correction factor (dB) / 0 / 2 / 2 / 2 / 2 / 2 / 2 / 2
Transmitter feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
Transmitter antenna gain (dB) / 0 / 0 / 0 / 0 / 0 / 0 / 0 / 0
Receiver antenna gain (dB) / 0 / 0 / 0 / 0 / 0 / 0 / 0 / 0
Receiver feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
Minimum required path loss (dB) / 91 / 79 / 74 / 69 / 67.75 / 64 / 59 / 54
Required Separation distance (m) / 6683 / 1679 / 932 / 531 / 454 / 299 / 168 / 94

*linear interpolation in dB

ground station INTERFERER vs Aircraft VICTIM

*Linear extrapolation in dB

Channel Offset (measurement bandwidth (kHz) / 1st (16 kHz) / 2nd (25 kHz) / 3rd (25 kHz) / 4th (25 kHz) / 5th (25 kHz) / 8th (25 kHz) / 16th (25 kHz) / 32nd (25 kHz)
Desired signal level at the receiver antenna (dBm) / -82 / -82 / -82 / -82 / -82 / -82 / -82 / -82
Receiver antenna gain (dB) / 0 / 0 / 0 / 0 / 0 / 0 / 0 / 0
Receiver feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
D/U in receiver passband (dB) / 30 / 30 / 30 / 30 / 30 / 30 / 30 / 30
Maximum level of interfering signal (dBm) / -115 / -115 / -115 / -115 / -115 / -115 / -115 / -115
Modulation scheme mask (dBm) / -18 / -28 / -33* / -38 / -39.25* / -43 / -48 / -53
Bandwidth correction factor (dB) / 0 / 2 / 2 / 2 / 2 / 2 / 2 / 2
Transmitter feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
Transmitter antenna gain (dB) / 2 / 2 / 2 / 2 / 2 / 2 / 2 / 2
Receiver antenna gain (dB) / 0 / 0 / 0 / 0 / 0 / 0 / 0 / 0
Receiver feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
Minimum required path loss (dB) / 93 / 81 / 72 / 71 / 65.75 / 66 / 61 / 56
Required Separation distance (m) / 8414 / 2113 / 741 / 668 / 361 / 376 / 211 / 119

Aircraft INTERFERER vs ground station VICTIM

Channel Offset (measurement bandwidth (kHz) / 1st (16 kHz) / 2nd (25 kHz) / 3rd (25 kHz) / 4th (25 kHz) / 5th (25 kHz) / 8th (25 kHz) / 16th (25 kHz) / 32nd (25 kHz)
Desired signal level at the receiver antenna (dBm) / -93 / -93 / -93 / -93 / -93 / -93 / -93 / -93
Receiver antenna gain (dB) / 2 / 2 / 2 / 2 / 2 / 2 / 2 / 2
Receiver feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
D/U in receiver passband (dB) / 30 / 30 / 30 / 30 / 30 / 30 / 30 / 30
Maximum level of interfering signal (dBm) / -124 / -124 / -124 / -124 / -124 / -124 / -124 / -124
Modulation scheme mask (dBm) / -18 / -28 / -33* / -38 / -39.25* / -43 / -48 / -53
Bandwidth correction factor (dB) / 0 / 2 / 2 / 2 / 2 / 2 / 2 / 2
Transmitter feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
Transmitter antenna gain (dB) / 0 / 0 / 0 / 0 / 0 / 0 / 0 / 0
Receiver antenna gain (dB) / 2 / 2 / 2 / 2 / 2 / 2 / 2 / 2
Receiver feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
Minimum required path loss (dB) / 102 / 90 / 85 / 80 / 78.75 / 75 / 70 / 65
Required Separation distance (m) / 23714 / 5957 / 3308 / 1884 / 1611 / 1059 / 596 / 335

*Linear extrapolation in dB

GROUND STATION INTERFERER vs ground station VICTIM

Channel Offset (measurement bandwidth (kHz) / 1st (16 kHz) / 2nd (25 kHz) / 3rd (25 kHz) / 4th (25 kHz) / 5th (25 kHz) / 8th (25 kHz) / 16th (25 kHz) / 32nd (25 kHz)
Desired signal level at the receiver antenna (dBm) / -93 / -93 / -93 / -93 / -93 / -93 / -93 / -93
Receiver antenna gain (dB) / 2 / 2 / 2 / 2 / 2 / 2 / 2 / 2
Receiver feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
D/U in receiver passband (dB) / 30 / 30 / 30 / 30 / 30 / 30 / 30 / 30
Maximum level of interfering signal (dBm) / -124 / -124 / -124 / -124 / -124 / -124 / -124 / -124
Modulation scheme mask (dBm) / -18 / -28 / -33* / -38 / -39.25* / -43 / -48 / -53
Bandwidth correction factor (dB) / 0 / 2 / 2 / 2 / 2 / 2 / 2 / 2
Transmitter feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
Transmitter antenna gain (dB) / 2 / 2 / 0 / 2 / 0 / 2 / 2 / 2
Receiver antenna gain (dB) / 2 / 2 / 0 / 2 / 0 / 2 / 2 / 2
Receiver feeder loss (dB) / 3 / 3 / 3 / 3 / 3 / 3 / 3 / 3
Minimum required path loss (dB) / 104 / 92 / 87 / 82 / 80.75 / 77 / 72 / 67
Required Separation distance (m) / 29854 / 7499 / 4165 / 2371 / 2028 / 1334 / 750 / 422

*Linear extrapolation in dB