Re: [Discuss-gnuradio] Sampling rate of gr-ieee 802.15.4

Hi,

> On 9. Nov 2017, at 17:25, Sumit Kumar <sumit.kumar@alumni.iiit.ac.in> 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
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