Re: [Discuss-gnuradio] gr-ieee 802.11 transmitter frame interval confusion

[Bastian Bloessl]

Hi,

> On 13 Feb 2017, at 10:27, sumitstop <address@hidden> wrote:

> While using the transmitter of gr-ieee 802.11, there is a parameter named
> interval. This is an input to message strobe. 
> 
> And message strobe is supposed to send messages after every "interval". 
> 
> Between that "interval", there is no transmission right ? So is there any
> zero padding of complex samples. 

Depends, if you talk about simulations or experiments with hardware.

In simulations the flow graph will be idle between frame transmissions and the 
phy will output the frames back-to-back. This is why there is a packet pad 
block to add some zeros between frames in case you need it.

If you have an SDR connected, the SDR will stop transmitting when there is 
nothing to send, but the receiver will, of course, continue to sample and, 
therefore, output noise samples between frames.
The number of samples depends on the sample rate and the time between frames. 
However, this is only a rough timing. The inter arrival time might vary by some 
milliseconds.

Best,
Bastian