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advanced-wireless [2022/03/09 15:43] – [Fragmentation Threshold]-formatting hogwild | advanced-wireless [2022/03/09 15:46] – [Bluetooth Coexistence] hogwild | ||
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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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* 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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**Auto: | **Auto: | ||
- | **Mixed Mode: **Mixed Mode transmissions can be decoded by 802.11a/g clients, providing backwards compatibility. In Mixed mode, 802.11n devices transmit a legacy format preamble, followed by an HT format preamble and a legacy radio signal. A Mixed mode device must also send legacy format CTS-to-Self or RTS/CTS (Request to Send/Clear to Send) frames before transmitting. These mechanisms let other 802.11a/b/g devices sense a busy network medium and wait for another turn to transmit. This alows for backwards compatiblity with earlier protocols, but reduces throughput, compared with Greenfield, or GF-BRCM modes. | + | **Mixed Mode: **Mixed Mode transmissions can be decoded by 802.11a/g clients, providing backwards compatibility. In Mixed mode, 802.11n devices transmit a legacy format preamble, followed by an HT format preamble and a legacy radio signal. A Mixed mode device must also send legacy format CTS-to-Self or RTS/CTS (Request to Send/Clear to Send) frames before transmitting. These mechanisms let other 802.11a/b/g devices sense a busy network medium and wait for another turn to transmit. This allows |
- | **Greenfield: | + | **Greenfield: |
**GF-BRCM: **TBD. \\ | **GF-BRCM: **TBD. \\ | ||
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==== Overlapping BSS Coexistence ==== | ==== Overlapping BSS Coexistence ==== | ||
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* opt. 2 AND opt. 3 | * opt. 2 AND opt. 3 | ||
* opt. 1 AND opt. 2 AND opt. 3 (All option enabled) \\ | * opt. 1 AND opt. 2 AND opt. 3 (All option enabled) \\ | ||
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==== Interference Mitigation ==== | ==== Interference Mitigation ==== | ||
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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 ==== |