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Re: [Discuss-gnuradio] Sampling rate of gr-ieee 802.15.4
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From: |
Bastian Bloessl |
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Subject: |
Re: [Discuss-gnuradio] Sampling rate of gr-ieee 802.15.4 |
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Date: |
Thu, 9 Nov 2017 20:02:16 +0000 |
Hi,
> On 9. Nov 2017, at 17:25, Sumit Kumar <address@hidden> wrote:
>
> Hi,
>
> The 802.15.4 spec says that the channels should be 2 MHz wide with 5 MHz
> inter channel spacing.
>
> Why does gr-ieee 802.15.4 uses a sampling rate of 4MHz instead of 2 MHz ?
>
> Off course it works with commercial devices, but I am curious why 4 MHz and
> not 2 MHz.
With 4Mhz, the receiver samples the signal at a rate of 2 samples per chip. You
could also use less or more, it’s a trade-off between computational complexity
and performance.
Best,
Bastian