Re: [Discuss-gnuradio] How to minimize Spillage of energy in neighboring frequencies while transmission

[Sylvain Munaut]

Hi,

> You can see the spectrogram at the receiver. I want to do narrowband(1 kHz)
> transmission hence I am keeping the sampling freq at transmitter at 1k.

That sentence is just wrong. It's actually quite the opposite.

By keeping the sample rate at the transmitter at 1k, you're basically
leaving all the alias filtering to the hardware and it's just not that
good.
You would be much better off oversampling the TX by like 10 and then
do digital filtering to make sure you filter out anything in the
higher freq.


Cheers,

   Sylvain