Question about Narrow band WLAN mode for long range for CYW4373

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FrYa_4831451
Level 2
Level 2
Distributor - Weikeng(GC)
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Hi,

I am studying the datesheet spec. of CYW4373. I found the description of IEEE 802.11ac PHY, but the feature is confused me as below:

   -   Narrow band (2.5, 5 & 10 MHz channel) WLAN mode for long range

May I ask what it is?

 

 

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raks_99
Moderator
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Hi @FrYa_4831451 ,

The CYW4373 supports narrowband modes having a bandwidth of 2.5, 5 & 10 MHz. This mode can be used where extended WiFi coverage is required and where 20Mhz  bandwidth signals cannot reach. 

10MHz usage, for example, noise power will be cut by half than 20Mhz receiving signal, which indicates 3dB SNR advantage (sensitivity gain) than 20Mhz. 5MHz can get 6dB SNR advantage than 20Mhz accordingly.

This mode of course has lesser throughput than 20/40/80Mhz modes. Applications include Vehicular communication (802.11p) , DSRC.

Thanks and Best Regards,

@raks_99 

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raks_99
Moderator
Moderator
Moderator
First question asked 250 replies posted 250 sign-ins

Hi @FrYa_4831451 ,

The CYW4373 supports narrowband modes having a bandwidth of 2.5, 5 & 10 MHz. This mode can be used where extended WiFi coverage is required and where 20Mhz  bandwidth signals cannot reach. 

10MHz usage, for example, noise power will be cut by half than 20Mhz receiving signal, which indicates 3dB SNR advantage (sensitivity gain) than 20Mhz. 5MHz can get 6dB SNR advantage than 20Mhz accordingly.

This mode of course has lesser throughput than 20/40/80Mhz modes. Applications include Vehicular communication (802.11p) , DSRC.

Thanks and Best Regards,

@raks_99 

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