antenna: Configure Noise Insertion¶
This command enables you to inject noise into the grid through the available antennas. While currently not supported, the same command will also provide access to spectrum analysers.
Note: Antennas are not part of the testbed configuration at NICTA. However, they are available in the WINLAB testbed.
Syntax¶
antenna(selector).signal.resource = value
antenna(selector).signal {}
where:
- selector: expression to select the antenna set. The supported syntax for the selector can be found in defGroup.
- signal: path to noise generator.
- resource: name of parameter. Antenna parameters that can be configured are:
- bandwidth: Bandwidth of signal
- channel: 802.11 channel
- power: output power in dbM
- on: on when set to true and off when set to false.
- value: value to assign to parameter.
The locations of the antennas within the testbed can be found missing.
Usage¶
1 antenna(4,4).signal {|s|
2 s.bandwidth = 20
3 s.channel = 36
4 s.power = prop.noisePower
5 }
Channel Mapping¶
Channel for IEEE 802.11a¶
| Channel Identifier | Frequency in MHz |
|---|---|
| 34 | 5170 |
| 36 | 5180 |
| 38 | 5190 |
| 40 | 5200 |
| 42 | 5210 |
| 44 | 5220 |
| 46 | 5230 |
| 48 | 5240 |
| 52 | 5260 |
| 56 | 5280 |
| 60 | 5300 |
| 64 | 5320 |
| 149 | 5745 |
| 153 | 5765 |
| 157 | 5785 |
| 161 | 5805 |
Channel for IEEE 802.11b¶
| Channel Identifier | Frequency in MHz |
|---|---|
| 1 | 2412 |
| 2 | 2417 |
| 3 | 2422 |
| 4 | 2427 |
| 5 | 2432 |
| 6 | 2442 |
| 8 | 2447 |
| 9 | 2452 |
| 10 | 2457 |
| 11 | 2462 |
| 12 | 2467 |
| 13 | 2472 |
| 14 | 2484 |
Maximum Power Levels and Antenna Gains¶
IEEE 802.11a¶
An improper combination of power level and antenna gain can result in Effective Isotropic Radiated Power (EIRP) above the amount allowed per regulatory domain. The following table indicates the maximum power levels and antenna gains allowed for each IEEE 802.11a regulatory domain.
| Regulatory Domain | Maximum Power Level (mW) with 6-dBi Antenna Gain |
|---|---|
| Americas (-A)(160 mW EIRP maximum on channels 36-48, 800 mW EIRP maximum on channels 52-64) | 40 |
| Japan (-J) (10 mW/MHz EIRP maximum) | 40 |
| Singapore (-S) (100 mW EIRP maximum) | 20 |
| Taiwan (-T) (800 mW EIRP maximum) | 40 |
IEEE 802.11b
An improper combination of power level and antenna gain can result in EIRP above the amount allowed per regulatory domain. The following table indicates the antenna gains and the maximum power levels in mW allowed for each IEEE 802.11b regulatory domain.
- Americas (-A) (4 W EIRP maximum)
- EMEA (-E) (100 mW EIRP maximum)
- Israel (-I) (100 mW EIRP maximum)
- China (-C) (10 mW EIRP maximum)
- Japan (-J) (10 mW/MHz EIRP maximum)
| Antenna Gain (dBi) | -A | -E | -I | -C | -J |
|---|---|---|---|---|---|
| 0 | 100 | 100 | 100 | 5 | 50 |
| 2.2 | 100 | 50 | 50 | 5 | 30 |
| 5.2 | 100 | 30 | 30 | n/a | 30 |
| 6 | 100 | 30 | 30 | n/a | 30 |
| 8.5 | 100 | 5 | 5 | n/a | n/a |
| 12 | 100 | 5 | 5 | n/a | n/a |
| 13.5 | 100 | 5 | 5 | n/a | 5 |
| 21 | 20 | 1 | 1 | n/a | n/a |