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advanced-wireless [2022/03/09 15:44] – [AC-PHY Interference Mitigation] hogwild | advanced-wireless [2022/06/10 09:51] – [Country Rev] m_ars | ||
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====== Advanced Wireless ====== | ====== Advanced Wireless ====== | ||
- | The Advanced Wireless menu contains settings for advanced tuning of Wi-Fi interfaces. Changing these settings from the defaults is not recommended unless you are experienced with advanced | + | The Advanced Wireless menu contains settings for advanced tuning of WiFi interfaces. Changing these settings from the defaults is not recommended unless you are experienced with advanced |
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==== Country / Region ==== | ==== Country / Region ==== | ||
- | (Default: Singapore / 12) | + | (Default: Singapore / 12) [ARM] |
Country code AND rev(ision) define the possible channel list, power and other regulations for each country. The current wireless driver (year 2020 and newer) supports approximately 290 countries and 2000 combinations of country code and revision. | Country code AND rev(ision) define the possible channel list, power and other regulations for each country. The current wireless driver (year 2020 and newer) supports approximately 290 countries and 2000 combinations of country code and revision. | ||
- | //Example Country / Region and Country Rev choices:// | + | //Example Country / Region and Country Rev choices |
* CY / 4 - Country: CY (Cyprus) AND Country Rev: 4 | * CY / 4 - Country: CY (Cyprus) AND Country Rev: 4 | ||
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* AU / 44 - Country: AU (Australia) AND Country Rev: 44 | * AU / 44 - Country: AU (Australia) AND Country Rev: 44 | ||
* SG / 12 - Country: SG (Singapore) AND Country Rev: 12 (default *) | * SG / 12 - Country: SG (Singapore) AND Country Rev: 12 (default *) | ||
+ | |||
+ | //Example Country / Region and Country Rev choices (MIPS Router, RT-N and RT-AC):// | ||
+ | |||
+ | * EU / 4 - Country: EU (Europe) AND Country Rev: 4 | ||
+ | * EU / 13 - Country: EU (Europe) AND Country Rev: 13 | ||
+ | * PL / 2 - Country: PL (Poland) AND Country Rev: 2 | ||
+ | * DE / 3 - Country: DE (Germany) AND Country Rev: 3 | ||
+ | * US / 10 - Country: US (USA) AND Country Rev: 10 | ||
+ | * CN / 1 - Country: CN (China) AND Country Rev: 1 | ||
+ | * TW / 4 - Country: TW (Taiwan) AND Country Rev: 4 | ||
Some combinations of Country and revision codes are invalid, and will not work together. For example, if you set country to USA, and change only country to " | Some combinations of Country and revision codes are invalid, and will not work together. For example, if you set country to USA, and change only country to " | ||
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Most users will be able to choose the correct settings from those in the Wireless menu. However, there are many more settings. | Most users will be able to choose the correct settings from those in the Wireless menu. However, there are many more settings. | ||
- | //Advanced users can see the complete list of settings and their code commit entries here:// | + | //Advanced users can see the complete list of settings and their code commit entries here:// |
+ | |||
+ | For SDK6 ARM router: \\ [[https:// | ||
+ | |||
+ | For SDK7 ARM router: \\ [[https:// | ||
+ | |||
+ | For SDK6 Mips (RT-AC) router: \\ [[https:// | ||
- | For SDK7 routers: \\ [[https:// | + | For SDK5 Mips (RT-N) router: \\ [[https:// |
- | For example, | + | Example: |
<code -> | <code -> | ||
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- | NOTE: For MIPS SDK5 (RT and RT-N) builds, there is currently | + | For MIPS SDK5 (RT) builds, there is only a country selection setting. |
+ | | ||
==== Country Rev ==== | ==== Country Rev ==== | ||
- | See the Country/ | + | See the Country/ |
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* Preemption | * Preemption | ||
- | Bluetooth and 2.4 GHz Wi-Fi radio waves can interfere with each other, since both operate on the same (2.4 GHz) frequency band. Choosing **Enable** can help to reduce that interference, | + | Bluetooth and 2.4 GHz WiFi radio waves can interfere with each other, since both operate on the same (2.4 GHz) frequency band. Choosing **Enable** can help to reduce that interference, |
The **Preemptive** function will make FreshTomato inform the Bluetooth device about which Bluetooth channel it's operating on. The Bluetooth device can then mark that channel as "in use" and use alternate channels for its own communications. | The **Preemptive** function will make FreshTomato inform the Bluetooth device about which Bluetooth channel it's operating on. The Bluetooth device can then mark that channel as "in use" and use alternate channels for its own communications. | ||
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In theory, this modulation method makes it possible to transmit more bits per symbol, and thus increase data rates. In reality, most claims of big increases in transfer rates are likely exaggerated. QAM links are more susceptible to noise. As a result, Turbo QAM is generally only useful in very low-noise/ | In theory, this modulation method makes it possible to transmit more bits per symbol, and thus increase data rates. In reality, most claims of big increases in transfer rates are likely exaggerated. QAM links are more susceptible to noise. As a result, Turbo QAM is generally only useful in very low-noise/ | ||
+ | \\ | ||
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+ | \\ | ||
==== Explicit beamforming ==== | ==== Explicit beamforming ==== | ||
- | Checking this enables Explicit beamforming technology. Traditionally, | + | Checking this enables Explicit beamforming technology. Traditionally, |
Beamforming radiates signals towards the receiver, instead of in an omnidirectional pattern. If the hardware has adequate information to send the radio energy in one particular direction, it will do so. The result can be an increase the signal-to-noise ratio and data rates between the two devices. | Beamforming radiates signals towards the receiver, instead of in an omnidirectional pattern. If the hardware has adequate information to send the radio energy in one particular direction, it will do so. The result can be an increase the signal-to-noise ratio and data rates between the two devices. | ||
- | Beamforming was introduced starting with 802.11n. but vendors used different standards. This meant beamforming made little | + | Beamforming was introduced starting with 802.11n. but vendors used different standards. This meant beamforming made little |
Beamforming works best at medium range. At short range, the signal power is high enough that the signal-to-noise ratio will support the maximum data rate. At long ranges, beamforming does not offer gains over an omnidirectional antenna. | Beamforming works best at medium range. At short range, the signal power is high enough that the signal-to-noise ratio will support the maximum data rate. At long ranges, beamforming does not offer gains over an omnidirectional antenna. | ||
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==== Universal/ | ==== Universal/ | ||
- | Beamforming is a performance feature included in Wi-Fi protocols starting with 802.11n. | + | Beamforming is a performance feature included in WiFi protocols starting with 802.11n. |
- | Traditionally, | + | Traditionally, |
With 802.11n, several beamforming methods were allowed, but no standard method existed. A lack of standardization meant beamforming usually provided little performance improvement. | With 802.11n, several beamforming methods were allowed, but no standard method existed. A lack of standardization meant beamforming usually provided little performance improvement. |