Re: [Discuss-gnuradio] SRRC pulse shaping question

2012-12-04 Thread George Sklivanitis
I think this means creating a new block as I cannot come up with a quick way of implementing the above. In any case, thanks much. -George On 12/5/12 12:27 AM, Brian Padalino wrote: You'll need to figure out how to flush the filter state and send actual 0+0j samples through. Maybe you can set

Re: [Discuss-gnuradio] SRRC pulse shaping question

2012-12-04 Thread Brian Padalino
You'll need to figure out how to flush the filter state and send actual 0+0j samples through. Maybe you can set a flag and multiply the samples coming out by 1 or 0 depending if you are flushing or not? Brian On Wed, Dec 5, 2012 at 12:11 AM, George Sklivanitis < george.sklivani...@gmail.com> wr

Re: [Discuss-gnuradio] SRRC pulse shaping question

2012-12-04 Thread George Sklivanitis
The filter is consisted of 55 taps. I tried by sending zeros. Though zeros are interpreted in -1's from the modulation mapping block. Moreover, the zeros will be taken into account as symbols to be shaped, therefore, the same thing will happen. -George On 12/5/12 12:07 AM, Brian Padalino wrot

Re: [Discuss-gnuradio] SRRC pulse shaping question

2012-12-04 Thread Brian Padalino
Have you taken into account the group delay of the filter? How long is your filter? Try sending zeroes at the end to flush your filter state? Brian On Tue, Dec 4, 2012 at 11:35 PM, George Sklivanitis < george.sklivani...@gmail.com> wrote: > Hello all, > > I have a question applying to everybo

[Discuss-gnuradio] SRRC pulse shaping question

2012-12-04 Thread George Sklivanitis
Hello all, I have a question applying to everybody that have tried transmitting symbols in different kinds of modulation (BPSK, QPSK, GMSK etc). I am using the following configuration in GNU Radio ( random source block -> bytes to symbols -> SRRC block -> file sink) The attached figure plots the