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BT Bandwidth required

Ted Thomas1
Prodigy 135 points

I know Bluetooth has available 79 1MHz channels.  What if the link were band-limited to 20 or 30 MHz?  

1) Would the link still work?

2) If it would, are there critical channel #s absolutely required to establish the link?

3) Would the link still support the same data rates assuming the available channels maintain adequate SNR?

4) Do your answers apply to BLE similarly?

Thank you, ted

  • 0
    TI__Expert 5840 points

    Hi,

    1. The Bluetooth spec defines the number of minimal active channels to 20 (Answer to Q1 is Yes).

    2. Inquiry/Inquiry Scan, Page/Page Scan use 32 channels which are homogeneously spread (as a fundtion of the BD Address of the IAC), the user/AFH can't control these channels. If they are blocked, the connection successful performance will be degraded. (it is hard to tell by how much as the channels are derived from the BD address)

    3. Once the link is established and 20 channels are used, data rates should be identical as if all channels are used.

    4. Yes

    Regards,

    Dotan