Re: [Discuss-gnuradio] Decoding constellation (0, 1-1) using gnuradio

[abhinav narain]

Hi Marcus,

Will be really great if you could look at the last part of my mail.

My specific questions is -

Lets say I transmit two PPM frames... 1100 and 1101

say: 1100000000001101

The number of non-bold zeros are what I am filling in between the information frames at transmitter.

But at receiver, I get more number of non-bold zeroes than what I expect(=8).

Is this something that I cannot solve because of clock-drift/synchronization, or is my flow graph incorrect causing this ?

Thanks,

Abhinav

On Tue, Nov 10, 2015 at 12:58 PM, abhinav narain <address@hidden> wrote:

On Tue, Nov 10, 2015 at 12:45 PM, Marcus Müller <address@hidden> wrote:

Hi Abhinav,

sorry, I might just be tired right now, but I don't understand this
sentence:

On 10.11.2015 21:18, abhinav narain wrote:
> I have now fallen to doing PPM where I map {0,1} bits to {101,11}
> symbols on the transmitter side, where 0 in 101 is equivalent to x 1x1
> as I don't transmit anything in that slot too.

 

I'd expect Pulse Position Modulation symbols to have the same length,
but with the non-zero element being at a different position; maybe I'm
just misunderstanding?

Yes, sorry - lets say 1010 and 1100 as the two  PPM codes.

Thanks,

Abhinav

 

Best regards,
Marcus